{"id":1697676,"date":"2026-01-08T13:31:17","date_gmt":"2026-01-08T10:31:17","guid":{"rendered":"https:\/\/analyse.optim.biz\/?p=1697676"},"modified":"2026-01-08T13:31:17","modified_gmt":"2026-01-08T10:31:17","slug":"the-shampoo-in-your-shower-may-past-its-prime-heres-how-to-tell-when-its-expired","status":"publish","type":"post","link":"https:\/\/analyse.optim.biz\/?p=1697676","title":{"rendered":"The Shampoo in Your Shower May Past Its Prime\u2014Here&#8217;s How to Tell When It&#8217;s Expired"},"content":{"rendered":"<p><main id=\"main_1-0\" class=\"comp main layout-body--continuous-scroll mntl-block\" data-tracking-container=\"true\"><\/p>\n<article id=\"beauty-article--sc_1-0\" class=\"comp beauty-article--sc beauty-article mntl-article mntl-article--three-column sc-ad-container\" data-tracking-container=\"true\">\n<div class=\"loc article-header\">\n<div id=\"article-header_1-0\" class=\"comp article-header mntl-block article-top\">\n<h1 id=\"article-heading_1-0\" class=\"comp article-heading mntl-text-block\">The Shampoo in Your Shower May Past Its Prime\u2014Here&#8217;s How to Tell When It&#8217;s Expired<\/h1>\n<p id=\"article-subheading_1-0\" class=\"comp article-subheading mntl-text-block\">Time to toss.<\/p>\n<div id=\"article-meta_1-0\" class=\"comp article-meta mntl-article-meta mntl-block\" data-tracking-container=\"true\">\n<div id=\"bylines_1-0\" class=\"comp bylines beauty-bylines mntl-bylines\" data-tracking-container=\"true\">\n<div id=\"mntl-bylines__group_1-0\" class=\"comp mntl-bylines__group mntl-block mntl-bylines__group--author\">\n<div id=\"mntl-bylines__item_1-0\" class=\"comp mntl-bylines__item mntl-attribution__item mntl-attribution__item--has-date\"><span class=\"mntl-attribution__item-descriptor\">By<\/span><\/p>\n<div data-tooltip=\"Beth Krietsch is a health and food writer with a Masters's Degree in Public Health Nutrition. She covers wellness for Byrdie, with an emphasis on food and nutrition.\" data-inline-tooltip=\"true\"> Beth Krietsch<\/p>\n<div id=\"mntl-author-tooltip_1-0\" class=\"comp mntl-author-tooltip mntl-tooltip mntl-group\">\n<div class=\"mntl-author-tooltip__top \">\n<div class=\"mntl-author-tooltip__image-wrapper\">\n<div class=\"img-placeholder\"><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" alt=\"Beth Krietsch\" class=\"lazyload mntl-author-tooltip__image mntl-image universal-image__image\" src=\"https:\/\/analyse.optim.biz\/wp-content\/uploads\/2026\/02\/krietsch_headshot-1ca84485031f4b489cdd4fbe735bf6d5.webp\" title=\"krietsch_headshot-1ca84485031f4b489cdd4fbe735bf6d5\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/analyse.optim.biz\/wp-content\/uploads\/2026\/02\/krietsch_headshot-1ca84485031f4b489cdd4fbe735bf6d5.webp\" width=\"200\" height=\"200\" class=\"img--noscript mntl-author-tooltip__image mntl-image universal-image__image\" alt=\"Beth Krietsch\" title=\"krietsch_headshot-1ca84485031f4b489cdd4fbe735bf6d5\"><\/div>\n<\/div>\n<div id=\"mntl-author-tooltip__name_1-0\" class=\"comp mntl-author-tooltip__name mntl-attribution__item \">\nBeth Krietsch\n<\/div>\n<div id=\"mntl-author-tooltip__social-nav_1-0\" class=\"comp mntl-author-tooltip__social-nav beauty-social-nav mntl-social-nav social-nav--tooltip\" data-tracking-container=\"true\">\n<ul class=\"social-nav__list\">\n<li class=\"social-nav__item social-nav__item--instagram\">\n<li class=\"social-nav__item social-nav__item--x\"><\/ul>\n<\/div>\n<div class=\"mntl-author-tooltip__bio\">\nBeth Krietsch is a health and food writer with a Masters&#8217;s Degree in Public Health Nutrition. She covers wellness for Byrdie, with an emphasis on food and nutrition.\n<\/div>\n<\/div>\n<div class=\"mntl-author-tooltip__bottom\">\nByrdie&#8217;s Editorial Guidelines\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"mntl-attribution__item-date\">Published on January 08, 2026 08:31AM<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"loc article-left-rail\">\n<div id=\"beauty-sticky-toc_1-0\" class=\"comp beauty-sticky-toc mntl-block js-sticky-container sticky-toc__wrapper\">\n<div id=\"sticky-toc_1-0\" class=\"comp sticky-toc mntl-universal-sticky-toc mntl-sticky-toc mntl-block sticky-toc-widget\" data-desktop-bp=\"70em\">\n<div id=\"toc-wrapper_1-0\" class=\"comp toc-wrapper mntl-toc mntl-block\" data-chop-mobile=\"false\" data-offset=\"60\" data-tracking-container=\"true\">\n<div id=\"mntl-toc__inner_1-0\" class=\"comp mntl-toc__inner mntl-block\">\n<div id=\"mntl-toc__heading_1-0\" class=\"comp mntl-toc__heading mntl-block js-toc-toggle\"><span id=\"mntl-toc__heading-text_1-0\" class=\"comp mntl-toc__heading-text mntl-text-block\">In This Article<\/span><\/p>\n<div id=\"mntl-toc-toggle_1-0\" class=\"comp mntl-toc-toggle mntl-block\">\n<div id=\"mntl-toc-toggle__btn_1-0\" class=\"comp mntl-toc-toggle__btn mntl-text-block js-mntl-toc-toggle text-label-300\" data-click-tracked=\"true\" data-collapsed-text=\"View All\" data-expanded-text=\"View Less\">View All<\/div>\n<\/div>\n<\/div>\n<div id=\"mntl-toc__mobile-toggle_1-0\" class=\"comp mntl-toc__mobile-toggle mntl-block js-sticky-toggle\"><span id=\"mntl-toc__heading-text_2-0\" class=\"comp mntl-toc__heading-text mntl-text-block\">In This Article<\/span><\/div>\n<ul id=\"mntl-toc__list_1-0\" class=\"comp mntl-toc__list mntl-toc__list-heading expert-content text-utility-300\">\n<li id=\"mntl-toc__list-item_1-0\" class=\"comp mntl-toc__list-item mntl-block\">\n<div id=\"mntl-toc__list-item-heading_1-0\" class=\"comp mntl-toc__list-item-heading mntl-block\"><span class=\"link__wrapper\">Do Shampoo and Conditioner Expire?<\/span><\/div>\n<\/li>\n<li id=\"mntl-toc__list-item_2-0\" class=\"comp mntl-toc__list-item mntl-block\">\n<div id=\"mntl-toc__list-item-heading_2-0\" class=\"comp mntl-toc__list-item-heading mntl-block\"><span class=\"link__wrapper\">How Long They Last<\/span><\/div>\n<\/li>\n<li id=\"mntl-toc__list-item_3-0\" class=\"comp mntl-toc__list-item mntl-block\">\n<div id=\"mntl-toc__list-item-heading_3-0\" class=\"comp mntl-toc__list-item-heading mntl-block\"><span class=\"link__wrapper\">Risks of Using Expired Products<\/span><\/div>\n<\/li>\n<li id=\"mntl-toc__list-item_4-0\" class=\"comp mntl-toc__list-item mntl-block\">\n<div id=\"mntl-toc__list-item-heading_4-0\" class=\"comp mntl-toc__list-item-heading mntl-block\"><span class=\"link__wrapper\">Signs of Expiration<\/span><\/div>\n<\/li>\n<li id=\"mntl-toc__list-item_5-0\" class=\"comp mntl-toc__list-item mntl-block\">\n<div id=\"mntl-toc__list-item-heading_5-0\" class=\"comp mntl-toc__list-item-heading mntl-block\"><span class=\"link__wrapper\">The Final Takeaway<\/span><\/div>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"loc article-content\">\n<div id=\"article__broad-video-jw_1-0\" class=\"comp article__broad-video-jw mntl-jwplayer-broad mntl-block is-hidden\" data-pixel-depth=\"100\">\n<div id=\"mntl-jwplayer-broad__title_1-0\" class=\"comp mntl-jwplayer-broad__title mntl-block\"><button id=\"mntl-jwplayer-broad__title-icon--close_1-0\" class=\"comp mntl-jwplayer-broad__title-icon--close mntl-block text-label-100\" data-click-tracked=\"false\"><span id=\"mntl-text-block_2-0\" class=\"comp mntl-text-block\">Close<\/span><\/button><\/div>\n<\/div>\n<div id=\"mntl-block_2-0\" class=\"comp mntl-block article__body right-rail\">\n<figure id=\"mntl-universal-primary-image_1-0\" class=\"comp mntl-universal-primary-image primary-image\" data-tracking-container=\"true\">\n<div class=\"primary-image__media\">\n<div class=\"img-placeholder\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/analyse.optim.biz\/wp-content\/uploads\/2026\/02\/shampoo-1-806ff350bfaf49a5ba0c632183b7dd3a-3.webp\" width=\"1155\" height=\"867\" alt=\"A hand holding a pump bottle partially filled with liquid soap or shampoo against a white background\" class=\" primary-image__image mntl-primary-image--blurry\" title=\"shampoo-1-806ff350bfaf49a5ba0c632183b7dd3a-3\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/analyse.optim.biz\/wp-content\/uploads\/2026\/02\/shampoo-1-806ff350bfaf49a5ba0c632183b7dd3a-3.webp\" width=\"1155\" height=\"867\" class=\"loaded primary-img--noscript primary-image__image mntl-primary-image--blurry\" alt=\"A hand holding a pump bottle partially filled with liquid soap or shampoo against a white background\" title=\"shampoo-1-806ff350bfaf49a5ba0c632183b7dd3a-3\"><\/div>\n<\/div><figcaption id=\"primary-image__figcap_1-0\" class=\"comp primary-image__figcap mntl-figure-caption figure-article-caption\"><span class=\"figure-article-caption-owner\"><\/p>\n<p>Stocksy<\/p>\n<p><\/span><\/figcaption><\/figure>\n<div id=\"mntl-sc-page_1-0\" class=\"comp mntl-sc-page mntl-block\" data-sc-sticky-offset=\"125\" data-sc-ad-label-height=\"16\" data-sc-ad-track-spacing=\"100\" data-sc-min-track-height=\"250\" data-sc-max-track-height=\"600\" data-sc-breakpoint=\"50em\" data-sc-load-immediate=\"5\" data-sc-content-positions=\"[1, 1250, 1, 1, 1, 1, 1, 1, 1]\" data-bind-scroll-on-start=\"true\">\n<div id=\"mntl-sc-block_1-0\" class=\"comp mntl-sc-block beauty-sc-block-callout--finalverdict beauty-sc-block-callout mntl-sc-block-callout mntl-block theme-finalverdict\" data-tracking-id=\"mntl-sc-block-callout\" data-tracking-container=\"true\">\n<p id=\"mntl-sc-block-callout-heading_1-0\" class=\"comp mntl-sc-block-callout-heading mntl-text-block\">Key Takeaways<\/p>\n<div id=\"mntl-sc-block-callout-body_1-0\" class=\"comp mntl-sc-block-callout-body mntl-text-block\">\n<ul>\n<li>\n<p>Shampoo and conditioner can become unstable and potentially irritating once they&#8217;ve expired.<\/p>\n<\/li>\n<li>\n<p>Opened shampoo and conditioner typically expire within six months to a year, while unopened bottles can last longer.<\/p>\n<\/li>\n<li>\n<p>Expired hair products may have signs like separating ingredients, a bad smell, or changes in texture or color.<\/p>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p id=\"mntl-sc-block_2-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Maybe you only shampoo and condition your hair once a week, or perhaps you rotate through many different products. In either case, a bottle of shampoo or conditioner may last you a really long time. This can be great in some ways, but it also raises one big question that many people never really think about: Do shampoo and conditioner expire? It turns out that yes, shampoo and conditioner both expire, and when they do, it&#8217;s not a great idea to use either product. <strong>Ahead, a dermatologist and a cosmetic chemist explain all you need to know about shampoo and conditioner expiration, including signs of when to toss your bottle.<\/strong><\/p>\n<div id=\"mntl-sc-block_4-0\" class=\"comp mntl-sc-block beauty-sc-block-callout--meetourexpert beauty-sc-block-callout mntl-sc-block-callout mntl-block theme-meetourexpert\" data-tracking-id=\"mntl-sc-block-callout\" data-tracking-container=\"true\">\n<p id=\"mntl-sc-block-callout-heading_2-0\" class=\"comp mntl-sc-block-callout-heading mntl-text-block\">Meet the Experts<\/p>\n<div id=\"mntl-sc-block-callout-body_2-0\" class=\"comp mntl-sc-block-callout-body mntl-text-block\">\n<ul>\n<li>David Kim, MD, is a board-certified dermatologist at Idriss Dermatology in New York City. He is also the Founder of LIGHTSAVER.<\/li>\n<li>David Petrillo, is a cosmetic skincare chemist and the founder of Perfect Image, a skincare brand focused on providing professional-grade peels and other products to consumers at an accessible price point.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<h2 id=\"mntl-sc-block_5-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> Do Shampoo and Conditioner Expire? <\/span><\/h2>\n<p id=\"mntl-sc-block_6-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"><strong>The answer here is simple: Yes, shampoo and conditioner can both expire.<\/strong> This means you should be on the lookout for the product&#8217;s expiration date and any signs that it may have passed its prime. Typically, the expiration date is listed on the bottle or somewhere on the packaging\u2014you may need to look at the box it came in. If you can&#8217;t find that information, try getting in touch with the company who made the product. &#8220;It would be a good idea to reach out to the manufacturer to get some additional information on batch identification or when it expires,&#8221; says cosmetic skincare chemist David Petrillo. &#8220;If they are unable to identify the product, then it may be a good idea to return the product or throw it away.&#8221;\n<\/p>\n<h2 id=\"mntl-sc-block_8-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> How Long Do Shampoo and Conditioner Last Before Expiring? <\/span><\/h2>\n<p id=\"mntl-sc-block_9-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Most shampoo and conditioner lasts at least six months or longer, though the specifics vary from one product to the next. An open bottle of shampoo or conditioner usually lasts between six months and a year, Petrillo says\u2014but if the bottle hasn&#8217;t been opened, it may last up to two or three years. &#8220;You will want to look for a PAO (period after opening) date, which is usually labeled as 6M, 12M, 18M, or 24M,&#8221; Petrillo says. &#8220;The M stands for months, and this should tell you how long the product is good for after you&#8217;ve opened it, as long as it&#8217;s stored in proper conditions.<\/p>\n<h2 id=\"mntl-sc-block_11-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> Is Okay to Use Expired Shampoo? <\/span><\/h2>\n<p id=\"mntl-sc-block_12-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> When shampoo and conditioner expire, they can become unstable, so you shouldn&#8217;t use them. The product may not only lose its effectiveness, but it could also irritate your skin or be harmful in other ways. &#8220;If the product is expired, chances are it is very unstable and ingredients are separated with potential bacteria contamination, which can lead to irritation, dryness, peeling, damage to follicles, and possible hair loss, to name a few,&#8221; Petrillo says.\n<\/p>\n<p id=\"mntl-sc-block_14-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Rarely, the degraded or unstable ingredients in expired shampoo and conditioner can cause a rash. &#8220;Sometimes, when the formula is no longer stable, it can grow mold too,&#8221; says board-certified dermatologist David Kim, MD.The rash is often in the form of contact dermatitis, which is an itchy, painful, or swollen rash that appears when someone comes into contact with something they&#8217;re allergic to or that irritates their skin.<\/p>\n<p id=\"mntl-sc-block_16-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> The main reason to avoid expired shampoo and conditioner is so that you&#8217;re not in contact with the product&#8217;s ingredients, which may no longer be stable. &#8220;It is never a good idea to use expired shampoo or conditioner, as it can be harmful to apply when the ingredients have been separated and the preservatives are no longer effective,&#8221; Petrillo says. &#8220;There could be potential contamination and harmful microorganisms [that] have developed that you do not want absorbed into your hair or scalp.&#8221; Shampoo and conditioner ingredients can penetrate your scalp fairly quickly, so expired shampoo or conditioner can have negative side effects even if they&#8217;re only applied briefly<em>. <\/em><\/p>\n<h2 id=\"mntl-sc-block_18-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> Signs of Expiration in Shampoo or Conditioner <\/span><\/h2>\n<p id=\"mntl-sc-block_19-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> One way to tell if your shampoo or conditioner has expired is to check the expiration date listed on the package. &#8220;The bottle usually has a &#8216;period after opening&#8217; logo, which is a logo that looks like a tiny container or jar with a number,&#8221; Kim says. &#8220;If it says 24M, it means the product is good for 24 months after opening.&#8221; You can also keep an eye out for physical changes to the product, as your shampoo or conditioner may have expired if the product is clumpy, separating, or the color has changed. Here are some specific signs of expiration that Petrillo recommends looking out for:\n<\/p>\n<ul id=\"mntl-sc-block_21-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\">\n<li><strong>Separating ingredients:<\/strong> &#8220;This means some of the chemical components have separated,&#8221; Petrillo says. &#8220;When this happens, you will usually see chemicals separated into layers, such as the oil components at the top and water components in a separate\u00a0layer.&#8221; If you pour out some of the shampoo or conditioner, you&#8217;ll probably notice the separating ingredients right away.\n<\/li>\n<li><strong>Changes in texture or color:<\/strong> This sign of expired shampoo or conditioner will most likely appear off or unnatural-looking, such as a clumpy texture or a new color. &#8220;The preservatives are most likely not effective and the product is no longer stable, so you may notice color change or discoloration,&#8221; Petrillo says.\n<\/li>\n<li><strong>Unpleasant smell:<\/strong> &#8220;If you notice a bad smell or unnatural odor to the product, this is something you may want to confirm with the brand or manufacturer,&#8221; Petrillo says.<\/li>\n<\/ul>\n<p id=\"mntl-sc-block_23-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> If the shampoo or conditioner&#8217;s consistency seems off (such as when the product is separating), you may be tempted to shake the bottle to mix the ingredients back together, but that&#8217;s actually not a great idea. It won&#8217;t mix well or maintain the same consistency it had when manufactured, and it also probably won&#8217;t penetrate the scalp the way it&#8217;s intended to, Petrillo says.<\/p>\n<h2 id=\"mntl-sc-block_25-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> The Final Takeaway <\/span><\/h2>\n<p id=\"mntl-sc-block_26-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Shampoo and conditioner can both expire, and when they do, you should avoid using them. Expired shampoo and conditioner can be harmful to your health, and they also may no longer be effective. Once open, most shampoo and conditioner lasts between six months and a year, but unopened bottles can last longer. To avoid wasting product, make note of the packaging&#8217;s period after opening date upon first purchase, and do your best to use all of the shampoo or conditioner by that time.<\/p>\n<\/div>\n<div id=\"citation-sources_1-0\" class=\"comp citation-sources mntl-article-sources mntl-expandable-block u-article-styles\" data-scroll-offset=\"70\">\n<div class=\"loc toggle-content\">\n<div id=\"mntl-article-sources__wrapper_1-0\" class=\"comp mntl-article-sources__wrapper mntl-block\" data-click-tracked=\"true\"><span id=\"mntl-article-sources__heading_1-0\" class=\"comp mntl-article-sources__heading mntl-text-block\">Article Sources<\/span><\/div>\n<\/div>\n<div class=\"loc expandable-content\">\n<div id=\"citation-sources__text_1-0\" class=\"comp citation-sources__text mntl-text-block\">Byrdie takes every opportunity to use high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial guidelines to learn more about how we keep our content accurate, reliable and trustworthy.<\/div>\n<div id=\"mntl-article-sources__citation-sources_1-0\" class=\"comp mntl-article-sources__citation-sources mntl-citation-sources mntl-sources\" data-tracking-container=\"true\">\n<ol class=\"mntl-sources__content\">\n<li class=\"mntl-sources__source\" id=\"citation-1\">\n<p>Contact dermatitis &#8211; Symptoms and causes. Mayo Clinic.<\/p>\n<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"loc article-post-content\">\n<div id=\"beauty-breadcrumbs--chips_1-0\" class=\"comp beauty-breadcrumbs--chips mntl-universal-breadcrumbs--chips mntl-block\">\n<div id=\"mntl-breadcrumbs__read-more_1-0\" class=\"comp mntl-breadcrumbs__read-more mntl-text-block text-title-100\">Read more:<\/div>\n<ul id=\"mntl-universal-breadcrumbs_1-0\" class=\"comp mntl-universal-breadcrumbs mntl-block text-label-300 breadcrumbs\" data-tracking-container=\"true\">\n<li id=\"mntl-breadcrumbs__item_1-0\" class=\"comp mntl-breadcrumbs__item mntl-block\"><span class=\"link__wrapper\">Hair<\/span><\/li>\n<li id=\"mntl-breadcrumbs__item_2-0\" class=\"comp mntl-breadcrumbs__item mntl-block\"><span class=\"link__wrapper\">Haircare<\/span><\/li>\n<li id=\"mntl-breadcrumbs__item_3-0\" class=\"comp mntl-breadcrumbs__item mntl-block\"><span class=\"link__wrapper\">Hair Products And Tools<\/span><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/article>\n<div id=\"recirc_1-0\" class=\"comp recirc mntl-block\" data-tracking-container=\"true\">\n<h2 id=\"recirc__heading_1-0\" class=\"comp recirc__heading mntl-text-block\">Related Stories<\/h2>\n<ul id=\"card-list-1_1-0\" class=\"comp card-list-1 card-list mntl-block l-container\" data-tracking-container=\"true\">\n<li id=\"card-list__item_1-0\" class=\"comp card-list__item mntl-block \">\n<div class=\"loc card__top\">\n<div class=\"card__media mntl-image card__media universal-image__container\">\n<div class=\"img-placeholder\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"240\" alt=\"Shampoos being tested on different hair types\" class=\"lazyload card__img universal-image__image\" src=\"https:\/\/analyse.optim.biz\/wp-content\/uploads\/2026\/02\/best-shampoos-tout-recirc-0ecb4f7e20f2478d9d67f1dec5a0e6a7-9.webp\" title=\"best-shampoos-tout-recirc-0ecb4f7e20f2478d9d67f1dec5a0e6a7-9\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/analyse.optim.biz\/wp-content\/uploads\/2026\/02\/best-shampoos-tout-recirc-0ecb4f7e20f2478d9d67f1dec5a0e6a7-9.webp\" width=\"300\" height=\"240\" class=\"img--noscript card__img universal-image__image\" alt=\"Shampoos being tested on different hair types\" title=\"best-shampoos-tout-recirc-0ecb4f7e20f2478d9d67f1dec5a0e6a7-9\"><\/div>\n<\/div>\n<\/div>\n<div class=\"card__content \"><span class=\"card__title\"><span class=\"card__title-text \">14 Best Shampoos for All Hair Types\u2014Shiny, Luscious Hair Awaits, Tested by Byrdie<\/span><\/span><\/div>\n<\/li>\n<li id=\"card-list__item_2-0\" class=\"comp card-list__item mntl-block \">\n<div class=\"loc card__top\">\n<div class=\"card__media mntl-image card__media universal-image__container\">\n<div class=\"img-placeholder\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"240\" alt=\"A person holding a bottle of Monday Volume Shampoo next to a person after using the shampoo\" 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class=\"card__title\"><span class=\"card__title-text \">How to Use Hyaluronic Acid for Healthier, More Hydrated Hair<\/span><\/span><\/div>\n<\/li>\n<li id=\"card-list__item_16-0\" class=\"comp card-list__item mntl-block \">\n<div class=\"loc card__top\">\n<div class=\"card__media mntl-image card__media universal-image__container\">\n<div class=\"img-placeholder\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"240\" alt=\"Sidebyside comparison of a person before and after using hair masks showing a difference in texture and appearance of their hair\" class=\"lazyload card__img universal-image__image\" src=\"https:\/\/analyse.optim.biz\/wp-content\/uploads\/2026\/02\/hair-masks-of-2025-tested-and-reviewed-updated-recirc-533d0472f2124b53862a0ef1706b4496-1.webp\" title=\"hair-masks-of-2025-tested-and-reviewed-updated-recirc-533d0472f2124b53862a0ef1706b4496-1\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/analyse.optim.biz\/wp-content\/uploads\/2026\/02\/hair-masks-of-2025-tested-and-reviewed-updated-recirc-533d0472f2124b53862a0ef1706b4496-1.webp\" width=\"300\" height=\"240\" class=\"img--noscript card__img universal-image__image\" alt=\"Sidebyside comparison of a person before and after using hair masks showing a difference in texture and appearance of their hair\" title=\"hair-masks-of-2025-tested-and-reviewed-updated-recirc-533d0472f2124b53862a0ef1706b4496-1\"><\/div>\n<\/div>\n<\/div>\n<div class=\"card__content \"><span class=\"card__title\"><span class=\"card__title-text \">The 12 Best Hair Masks to Boost Hydration and Add Shine, After Weeks of Testing<\/span><\/span><\/div>\n<\/li>\n<\/ul>\n<\/div>\n<p><\/main><\/p>\n<article id=\"beauty-article--sc_1-0\" class=\"comp beauty-article--sc beauty-article mntl-article mntl-article--three-column sc-ad-container\" data-tracking-container=\"true\">\n<div class=\"loc article-header\">\n<div id=\"article-header_1-0\" class=\"comp article-header mntl-block article-top\">\n<h1 id=\"article-heading_1-0\" class=\"comp article-heading mntl-text-block\">The Shampoo in Your Shower May Past Its Prime\u2014Here&#8217;s How to Tell When It&#8217;s Expired<\/h1>\n<p id=\"article-subheading_1-0\" class=\"comp article-subheading mntl-text-block\">Time to toss.<\/p>\n<div id=\"article-meta_1-0\" class=\"comp article-meta mntl-article-meta mntl-block\" data-tracking-container=\"true\">\n<div id=\"bylines_1-0\" class=\"comp bylines beauty-bylines mntl-bylines\" data-tracking-container=\"true\">\n<div id=\"mntl-bylines__group_1-0\" class=\"comp mntl-bylines__group mntl-block mntl-bylines__group--author\">\n<div id=\"mntl-bylines__item_1-0\" class=\"comp mntl-bylines__item mntl-attribution__item mntl-attribution__item--has-date\"><span class=\"mntl-attribution__item-descriptor\">By<\/span><\/p>\n<div data-tooltip=\"Beth Krietsch is a health and food writer with a Masters's Degree in Public Health Nutrition. She covers wellness for Byrdie, with an emphasis on food and nutrition.\" data-inline-tooltip=\"true\"> Beth Krietsch<\/p>\n<div id=\"mntl-author-tooltip_1-0\" class=\"comp mntl-author-tooltip mntl-tooltip mntl-group\">\n<div class=\"mntl-author-tooltip__top \">\n<div class=\"mntl-author-tooltip__image-wrapper\">\n<div class=\"img-placeholder\"><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" alt=\"Beth Krietsch\" class=\"lazyload mntl-author-tooltip__image mntl-image universal-image__image\" src=\"https:\/\/analyse.optim.biz\/wp-content\/uploads\/2026\/02\/krietsch_headshot-1ca84485031f4b489cdd4fbe735bf6d5.webp\" title=\"krietsch_headshot-1ca84485031f4b489cdd4fbe735bf6d5\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/analyse.optim.biz\/wp-content\/uploads\/2026\/02\/krietsch_headshot-1ca84485031f4b489cdd4fbe735bf6d5.webp\" width=\"200\" height=\"200\" class=\"img--noscript mntl-author-tooltip__image mntl-image universal-image__image\" alt=\"Beth Krietsch\" title=\"krietsch_headshot-1ca84485031f4b489cdd4fbe735bf6d5\"><\/div>\n<\/div>\n<div id=\"mntl-author-tooltip__name_1-0\" class=\"comp mntl-author-tooltip__name mntl-attribution__item \">\nBeth Krietsch\n<\/div>\n<div id=\"mntl-author-tooltip__social-nav_1-0\" class=\"comp mntl-author-tooltip__social-nav beauty-social-nav mntl-social-nav social-nav--tooltip\" data-tracking-container=\"true\">\n<ul class=\"social-nav__list\">\n<li class=\"social-nav__item social-nav__item--instagram\">\n<li class=\"social-nav__item social-nav__item--x\"><\/ul>\n<\/div>\n<div class=\"mntl-author-tooltip__bio\">\nBeth Krietsch is a health and food writer with a Masters&#8217;s Degree in Public Health Nutrition. She covers wellness for Byrdie, with an emphasis on food and nutrition.\n<\/div>\n<\/div>\n<div class=\"mntl-author-tooltip__bottom\">\nByrdie&#8217;s Editorial Guidelines\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"mntl-attribution__item-date\">Published on January 08, 2026 08:31AM<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"loc article-left-rail\">\n<div id=\"beauty-sticky-toc_1-0\" class=\"comp beauty-sticky-toc mntl-block js-sticky-container sticky-toc__wrapper\">\n<div id=\"sticky-toc_1-0\" class=\"comp sticky-toc mntl-universal-sticky-toc mntl-sticky-toc mntl-block sticky-toc-widget\" data-desktop-bp=\"70em\">\n<div id=\"toc-wrapper_1-0\" class=\"comp toc-wrapper mntl-toc mntl-block\" data-chop-mobile=\"false\" data-offset=\"60\" data-tracking-container=\"true\">\n<div id=\"mntl-toc__inner_1-0\" class=\"comp mntl-toc__inner mntl-block\">\n<div id=\"mntl-toc__heading_1-0\" class=\"comp mntl-toc__heading mntl-block js-toc-toggle\"><span id=\"mntl-toc__heading-text_1-0\" class=\"comp mntl-toc__heading-text mntl-text-block\">In This Article<\/span><\/p>\n<div id=\"mntl-toc-toggle_1-0\" class=\"comp mntl-toc-toggle mntl-block\">\n<div id=\"mntl-toc-toggle__btn_1-0\" class=\"comp mntl-toc-toggle__btn mntl-text-block js-mntl-toc-toggle text-label-300\" data-click-tracked=\"true\" data-collapsed-text=\"View All\" data-expanded-text=\"View Less\">View All<\/div>\n<\/div>\n<\/div>\n<div id=\"mntl-toc__mobile-toggle_1-0\" class=\"comp mntl-toc__mobile-toggle mntl-block js-sticky-toggle\"><span id=\"mntl-toc__heading-text_2-0\" class=\"comp mntl-toc__heading-text mntl-text-block\">In This Article<\/span><\/div>\n<ul id=\"mntl-toc__list_1-0\" class=\"comp mntl-toc__list mntl-toc__list-heading expert-content text-utility-300\">\n<li id=\"mntl-toc__list-item_1-0\" class=\"comp mntl-toc__list-item mntl-block\">\n<div id=\"mntl-toc__list-item-heading_1-0\" class=\"comp mntl-toc__list-item-heading mntl-block\"><span class=\"link__wrapper\">Do Shampoo and Conditioner Expire?<\/span><\/div>\n<\/li>\n<li id=\"mntl-toc__list-item_2-0\" class=\"comp mntl-toc__list-item mntl-block\">\n<div id=\"mntl-toc__list-item-heading_2-0\" class=\"comp mntl-toc__list-item-heading mntl-block\"><span class=\"link__wrapper\">How Long They Last<\/span><\/div>\n<\/li>\n<li id=\"mntl-toc__list-item_3-0\" class=\"comp mntl-toc__list-item mntl-block\">\n<div id=\"mntl-toc__list-item-heading_3-0\" class=\"comp mntl-toc__list-item-heading mntl-block\"><span class=\"link__wrapper\">Risks of Using Expired Products<\/span><\/div>\n<\/li>\n<li id=\"mntl-toc__list-item_4-0\" class=\"comp mntl-toc__list-item mntl-block\">\n<div id=\"mntl-toc__list-item-heading_4-0\" class=\"comp mntl-toc__list-item-heading mntl-block\"><span class=\"link__wrapper\">Signs of Expiration<\/span><\/div>\n<\/li>\n<li id=\"mntl-toc__list-item_5-0\" class=\"comp mntl-toc__list-item mntl-block\">\n<div id=\"mntl-toc__list-item-heading_5-0\" class=\"comp mntl-toc__list-item-heading mntl-block\"><span class=\"link__wrapper\">The Final Takeaway<\/span><\/div>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"loc article-content\">\n<div id=\"article__broad-video-jw_1-0\" class=\"comp article__broad-video-jw mntl-jwplayer-broad mntl-block is-hidden\" data-pixel-depth=\"100\">\n<div id=\"mntl-jwplayer-broad__title_1-0\" class=\"comp mntl-jwplayer-broad__title mntl-block\"><button id=\"mntl-jwplayer-broad__title-icon--close_1-0\" class=\"comp mntl-jwplayer-broad__title-icon--close mntl-block text-label-100\" data-click-tracked=\"false\"><span id=\"mntl-text-block_2-0\" class=\"comp mntl-text-block\">Close<\/span><\/button><\/div>\n<\/div>\n<div id=\"mntl-block_2-0\" class=\"comp mntl-block article__body right-rail\">\n<figure id=\"mntl-universal-primary-image_1-0\" class=\"comp mntl-universal-primary-image primary-image\" data-tracking-container=\"true\">\n<div class=\"primary-image__media\">\n<div class=\"img-placeholder\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/analyse.optim.biz\/wp-content\/uploads\/2026\/02\/shampoo-1-806ff350bfaf49a5ba0c632183b7dd3a-3.webp\" width=\"1155\" height=\"867\" alt=\"A hand holding a pump bottle partially filled with liquid soap or shampoo against a white background\" class=\" primary-image__image mntl-primary-image--blurry\" title=\"shampoo-1-806ff350bfaf49a5ba0c632183b7dd3a-3\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/analyse.optim.biz\/wp-content\/uploads\/2026\/02\/shampoo-1-806ff350bfaf49a5ba0c632183b7dd3a-3.webp\" width=\"1155\" height=\"867\" class=\"loaded primary-img--noscript primary-image__image mntl-primary-image--blurry\" alt=\"A hand holding a pump bottle partially filled with liquid soap or shampoo against a white background\" title=\"shampoo-1-806ff350bfaf49a5ba0c632183b7dd3a-3\"><\/div>\n<\/div><figcaption id=\"primary-image__figcap_1-0\" class=\"comp primary-image__figcap mntl-figure-caption figure-article-caption\"><span class=\"figure-article-caption-owner\"><\/p>\n<p>Stocksy<\/p>\n<p><\/span><\/figcaption><\/figure>\n<div id=\"mntl-sc-page_1-0\" class=\"comp mntl-sc-page mntl-block\" data-sc-sticky-offset=\"125\" data-sc-ad-label-height=\"16\" data-sc-ad-track-spacing=\"100\" data-sc-min-track-height=\"250\" data-sc-max-track-height=\"600\" data-sc-breakpoint=\"50em\" data-sc-load-immediate=\"5\" data-sc-content-positions=\"[1, 1250, 1, 1, 1, 1, 1, 1, 1]\" data-bind-scroll-on-start=\"true\">\n<div id=\"mntl-sc-block_1-0\" class=\"comp mntl-sc-block beauty-sc-block-callout--finalverdict beauty-sc-block-callout mntl-sc-block-callout mntl-block theme-finalverdict\" data-tracking-id=\"mntl-sc-block-callout\" data-tracking-container=\"true\">\n<p id=\"mntl-sc-block-callout-heading_1-0\" class=\"comp mntl-sc-block-callout-heading mntl-text-block\">Key Takeaways<\/p>\n<div id=\"mntl-sc-block-callout-body_1-0\" class=\"comp mntl-sc-block-callout-body mntl-text-block\">\n<ul>\n<li>\n<p>Shampoo and conditioner can become unstable and potentially irritating once they&#8217;ve expired.<\/p>\n<\/li>\n<li>\n<p>Opened shampoo and conditioner typically expire within six months to a year, while unopened bottles can last longer.<\/p>\n<\/li>\n<li>\n<p>Expired hair products may have signs like separating ingredients, a bad smell, or changes in texture or color.<\/p>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p id=\"mntl-sc-block_2-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Maybe you only shampoo and condition your hair once a week, or perhaps you rotate through many different products. In either case, a bottle of shampoo or conditioner may last you a really long time. This can be great in some ways, but it also raises one big question that many people never really think about: Do shampoo and conditioner expire? It turns out that yes, shampoo and conditioner both expire, and when they do, it&#8217;s not a great idea to use either product. <strong>Ahead, a dermatologist and a cosmetic chemist explain all you need to know about shampoo and conditioner expiration, including signs of when to toss your bottle.<\/strong><\/p>\n<div id=\"mntl-sc-block_4-0\" class=\"comp mntl-sc-block beauty-sc-block-callout--meetourexpert beauty-sc-block-callout mntl-sc-block-callout mntl-block theme-meetourexpert\" data-tracking-id=\"mntl-sc-block-callout\" data-tracking-container=\"true\">\n<p id=\"mntl-sc-block-callout-heading_2-0\" class=\"comp mntl-sc-block-callout-heading mntl-text-block\">Meet the Experts<\/p>\n<div id=\"mntl-sc-block-callout-body_2-0\" class=\"comp mntl-sc-block-callout-body mntl-text-block\">\n<ul>\n<li>David Kim, MD, is a board-certified dermatologist at Idriss Dermatology in New York City. He is also the Founder of LIGHTSAVER.<\/li>\n<li>David Petrillo, is a cosmetic skincare chemist and the founder of Perfect Image, a skincare brand focused on providing professional-grade peels and other products to consumers at an accessible price point.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<h2 id=\"mntl-sc-block_5-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> Do Shampoo and Conditioner Expire? <\/span><\/h2>\n<p id=\"mntl-sc-block_6-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"><strong>The answer here is simple: Yes, shampoo and conditioner can both expire.<\/strong> This means you should be on the lookout for the product&#8217;s expiration date and any signs that it may have passed its prime. Typically, the expiration date is listed on the bottle or somewhere on the packaging\u2014you may need to look at the box it came in. If you can&#8217;t find that information, try getting in touch with the company who made the product. &#8220;It would be a good idea to reach out to the manufacturer to get some additional information on batch identification or when it expires,&#8221; says cosmetic skincare chemist David Petrillo. &#8220;If they are unable to identify the product, then it may be a good idea to return the product or throw it away.&#8221;\n<\/p>\n<h2 id=\"mntl-sc-block_8-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> How Long Do Shampoo and Conditioner Last Before Expiring? <\/span><\/h2>\n<p id=\"mntl-sc-block_9-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Most shampoo and conditioner lasts at least six months or longer, though the specifics vary from one product to the next. An open bottle of shampoo or conditioner usually lasts between six months and a year, Petrillo says\u2014but if the bottle hasn&#8217;t been opened, it may last up to two or three years. &#8220;You will want to look for a PAO (period after opening) date, which is usually labeled as 6M, 12M, 18M, or 24M,&#8221; Petrillo says. &#8220;The M stands for months, and this should tell you how long the product is good for after you&#8217;ve opened it, as long as it&#8217;s stored in proper conditions.<\/p>\n<h2 id=\"mntl-sc-block_11-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> Is Okay to Use Expired Shampoo? <\/span><\/h2>\n<p id=\"mntl-sc-block_12-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> When shampoo and conditioner expire, they can become unstable, so you shouldn&#8217;t use them. The product may not only lose its effectiveness, but it could also irritate your skin or be harmful in other ways. &#8220;If the product is expired, chances are it is very unstable and ingredients are separated with potential bacteria contamination, which can lead to irritation, dryness, peeling, damage to follicles, and possible hair loss, to name a few,&#8221; Petrillo says.\n<\/p>\n<p id=\"mntl-sc-block_14-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Rarely, the degraded or unstable ingredients in expired shampoo and conditioner can cause a rash. &#8220;Sometimes, when the formula is no longer stable, it can grow mold too,&#8221; says board-certified dermatologist David Kim, MD.The rash is often in the form of contact dermatitis, which is an itchy, painful, or swollen rash that appears when someone comes into contact with something they&#8217;re allergic to or that irritates their skin.<\/p>\n<p id=\"mntl-sc-block_16-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> The main reason to avoid expired shampoo and conditioner is so that you&#8217;re not in contact with the product&#8217;s ingredients, which may no longer be stable. &#8220;It is never a good idea to use expired shampoo or conditioner, as it can be harmful to apply when the ingredients have been separated and the preservatives are no longer effective,&#8221; Petrillo says. &#8220;There could be potential contamination and harmful microorganisms [that] have developed that you do not want absorbed into your hair or scalp.&#8221; Shampoo and conditioner ingredients can penetrate your scalp fairly quickly, so expired shampoo or conditioner can have negative side effects even if they&#8217;re only applied briefly<em>. <\/em><\/p>\n<h2 id=\"mntl-sc-block_18-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> Signs of Expiration in Shampoo or Conditioner <\/span><\/h2>\n<p id=\"mntl-sc-block_19-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> One way to tell if your shampoo or conditioner has expired is to check the expiration date listed on the package. &#8220;The bottle usually has a &#8216;period after opening&#8217; logo, which is a logo that looks like a tiny container or jar with a number,&#8221; Kim says. &#8220;If it says 24M, it means the product is good for 24 months after opening.&#8221; You can also keep an eye out for physical changes to the product, as your shampoo or conditioner may have expired if the product is clumpy, separating, or the color has changed. Here are some specific signs of expiration that Petrillo recommends looking out for:\n<\/p>\n<ul id=\"mntl-sc-block_21-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\">\n<li><strong>Separating ingredients:<\/strong> &#8220;This means some of the chemical components have separated,&#8221; Petrillo says. &#8220;When this happens, you will usually see chemicals separated into layers, such as the oil components at the top and water components in a separate\u00a0layer.&#8221; If you pour out some of the shampoo or conditioner, you&#8217;ll probably notice the separating ingredients right away.\n<\/li>\n<li><strong>Changes in texture or color:<\/strong> This sign of expired shampoo or conditioner will most likely appear off or unnatural-looking, such as a clumpy texture or a new color. &#8220;The preservatives are most likely not effective and the product is no longer stable, so you may notice color change or discoloration,&#8221; Petrillo says.\n<\/li>\n<li><strong>Unpleasant smell:<\/strong> &#8220;If you notice a bad smell or unnatural odor to the product, this is something you may want to confirm with the brand or manufacturer,&#8221; Petrillo says.<\/li>\n<\/ul>\n<p id=\"mntl-sc-block_23-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> If the shampoo or conditioner&#8217;s consistency seems off (such as when the product is separating), you may be tempted to shake the bottle to mix the ingredients back together, but that&#8217;s actually not a great idea. It won&#8217;t mix well or maintain the same consistency it had when manufactured, and it also probably won&#8217;t penetrate the scalp the way it&#8217;s intended to, Petrillo says.<\/p>\n<h2 id=\"mntl-sc-block_25-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> The Final Takeaway <\/span><\/h2>\n<p id=\"mntl-sc-block_26-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Shampoo and conditioner can both expire, and when they do, you should avoid using them. Expired shampoo and conditioner can be harmful to your health, and they also may no longer be effective. Once open, most shampoo and conditioner lasts between six months and a year, but unopened bottles can last longer. To avoid wasting product, make note of the packaging&#8217;s period after opening date upon first purchase, and do your best to use all of the shampoo or conditioner by that time.<\/p>\n<\/div>\n<div id=\"citation-sources_1-0\" class=\"comp citation-sources mntl-article-sources mntl-expandable-block u-article-styles\" data-scroll-offset=\"70\">\n<div class=\"loc toggle-content\">\n<div id=\"mntl-article-sources__wrapper_1-0\" class=\"comp mntl-article-sources__wrapper mntl-block\" data-click-tracked=\"true\"><span id=\"mntl-article-sources__heading_1-0\" class=\"comp mntl-article-sources__heading mntl-text-block\">Article Sources<\/span><\/div>\n<\/div>\n<div class=\"loc expandable-content\">\n<div id=\"citation-sources__text_1-0\" class=\"comp citation-sources__text mntl-text-block\">Byrdie takes every opportunity to use high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial guidelines to learn more about how we keep our content accurate, reliable and trustworthy.<\/div>\n<div id=\"mntl-article-sources__citation-sources_1-0\" class=\"comp mntl-article-sources__citation-sources mntl-citation-sources mntl-sources\" data-tracking-container=\"true\">\n<ol class=\"mntl-sources__content\">\n<li class=\"mntl-sources__source\" id=\"citation-1\">\n<p>Contact dermatitis &#8211; Symptoms and causes. Mayo Clinic.<\/p>\n<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"loc article-post-content\">\n<div id=\"beauty-breadcrumbs--chips_1-0\" class=\"comp beauty-breadcrumbs--chips mntl-universal-breadcrumbs--chips mntl-block\">\n<div id=\"mntl-breadcrumbs__read-more_1-0\" class=\"comp mntl-breadcrumbs__read-more mntl-text-block text-title-100\">Read more:<\/div>\n<ul id=\"mntl-universal-breadcrumbs_1-0\" class=\"comp mntl-universal-breadcrumbs mntl-block text-label-300 breadcrumbs\" data-tracking-container=\"true\">\n<li id=\"mntl-breadcrumbs__item_1-0\" class=\"comp mntl-breadcrumbs__item mntl-block\"><span class=\"link__wrapper\">Hair<\/span><\/li>\n<li id=\"mntl-breadcrumbs__item_2-0\" class=\"comp mntl-breadcrumbs__item mntl-block\"><span class=\"link__wrapper\">Haircare<\/span><\/li>\n<li id=\"mntl-breadcrumbs__item_3-0\" class=\"comp mntl-breadcrumbs__item mntl-block\"><span class=\"link__wrapper\">Hair Products And Tools<\/span><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/article>\n<div class=\"loc article-content\">\n<div id=\"article__broad-video-jw_1-0\" class=\"comp article__broad-video-jw mntl-jwplayer-broad mntl-block is-hidden\" data-pixel-depth=\"100\">\n<div id=\"mntl-jwplayer-broad__title_1-0\" class=\"comp mntl-jwplayer-broad__title mntl-block\"><button id=\"mntl-jwplayer-broad__title-icon--close_1-0\" class=\"comp mntl-jwplayer-broad__title-icon--close mntl-block text-label-100\" data-click-tracked=\"false\"><span id=\"mntl-text-block_2-0\" class=\"comp mntl-text-block\">Close<\/span><\/button><\/div>\n<\/div>\n<div id=\"mntl-block_2-0\" class=\"comp mntl-block article__body right-rail\">\n<figure id=\"mntl-universal-primary-image_1-0\" class=\"comp mntl-universal-primary-image primary-image\" data-tracking-container=\"true\">\n<div class=\"primary-image__media\">\n<div class=\"img-placeholder\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/analyse.optim.biz\/wp-content\/uploads\/2026\/02\/shampoo-1-806ff350bfaf49a5ba0c632183b7dd3a-3.webp\" width=\"1155\" height=\"867\" alt=\"A hand holding a pump bottle partially filled with liquid soap or shampoo against a white background\" class=\" primary-image__image mntl-primary-image--blurry\" title=\"shampoo-1-806ff350bfaf49a5ba0c632183b7dd3a-3\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/analyse.optim.biz\/wp-content\/uploads\/2026\/02\/shampoo-1-806ff350bfaf49a5ba0c632183b7dd3a-3.webp\" width=\"1155\" height=\"867\" class=\"loaded primary-img--noscript primary-image__image mntl-primary-image--blurry\" alt=\"A hand holding a pump bottle partially filled with liquid soap or shampoo against a white background\" title=\"shampoo-1-806ff350bfaf49a5ba0c632183b7dd3a-3\"><\/div>\n<\/div><figcaption id=\"primary-image__figcap_1-0\" class=\"comp primary-image__figcap mntl-figure-caption figure-article-caption\"><span class=\"figure-article-caption-owner\"><\/p>\n<p>Stocksy<\/p>\n<p><\/span><\/figcaption><\/figure>\n<div id=\"mntl-sc-page_1-0\" class=\"comp mntl-sc-page mntl-block\" data-sc-sticky-offset=\"125\" data-sc-ad-label-height=\"16\" data-sc-ad-track-spacing=\"100\" data-sc-min-track-height=\"250\" data-sc-max-track-height=\"600\" data-sc-breakpoint=\"50em\" data-sc-load-immediate=\"5\" data-sc-content-positions=\"[1, 1250, 1, 1, 1, 1, 1, 1, 1]\" data-bind-scroll-on-start=\"true\">\n<div id=\"mntl-sc-block_1-0\" class=\"comp mntl-sc-block beauty-sc-block-callout--finalverdict beauty-sc-block-callout mntl-sc-block-callout mntl-block theme-finalverdict\" data-tracking-id=\"mntl-sc-block-callout\" data-tracking-container=\"true\">\n<p id=\"mntl-sc-block-callout-heading_1-0\" class=\"comp mntl-sc-block-callout-heading mntl-text-block\">Key Takeaways<\/p>\n<div id=\"mntl-sc-block-callout-body_1-0\" class=\"comp mntl-sc-block-callout-body mntl-text-block\">\n<ul>\n<li>\n<p>Shampoo and conditioner can become unstable and potentially irritating once they&#8217;ve expired.<\/p>\n<\/li>\n<li>\n<p>Opened shampoo and conditioner typically expire within six months to a year, while unopened bottles can last longer.<\/p>\n<\/li>\n<li>\n<p>Expired hair products may have signs like separating ingredients, a bad smell, or changes in texture or color.<\/p>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p id=\"mntl-sc-block_2-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Maybe you only shampoo and condition your hair once a week, or perhaps you rotate through many different products. In either case, a bottle of shampoo or conditioner may last you a really long time. This can be great in some ways, but it also raises one big question that many people never really think about: Do shampoo and conditioner expire? It turns out that yes, shampoo and conditioner both expire, and when they do, it&#8217;s not a great idea to use either product. <strong>Ahead, a dermatologist and a cosmetic chemist explain all you need to know about shampoo and conditioner expiration, including signs of when to toss your bottle.<\/strong><\/p>\n<div id=\"mntl-sc-block_4-0\" class=\"comp mntl-sc-block beauty-sc-block-callout--meetourexpert beauty-sc-block-callout mntl-sc-block-callout mntl-block theme-meetourexpert\" data-tracking-id=\"mntl-sc-block-callout\" data-tracking-container=\"true\">\n<p id=\"mntl-sc-block-callout-heading_2-0\" class=\"comp mntl-sc-block-callout-heading mntl-text-block\">Meet the Experts<\/p>\n<div id=\"mntl-sc-block-callout-body_2-0\" class=\"comp mntl-sc-block-callout-body mntl-text-block\">\n<ul>\n<li>David Kim, MD, is a board-certified dermatologist at Idriss Dermatology in New York City. He is also the Founder of LIGHTSAVER.<\/li>\n<li>David Petrillo, is a cosmetic skincare chemist and the founder of Perfect Image, a skincare brand focused on providing professional-grade peels and other products to consumers at an accessible price point.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<h2 id=\"mntl-sc-block_5-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> Do Shampoo and Conditioner Expire? <\/span><\/h2>\n<p id=\"mntl-sc-block_6-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"><strong>The answer here is simple: Yes, shampoo and conditioner can both expire.<\/strong> This means you should be on the lookout for the product&#8217;s expiration date and any signs that it may have passed its prime. Typically, the expiration date is listed on the bottle or somewhere on the packaging\u2014you may need to look at the box it came in. If you can&#8217;t find that information, try getting in touch with the company who made the product. &#8220;It would be a good idea to reach out to the manufacturer to get some additional information on batch identification or when it expires,&#8221; says cosmetic skincare chemist David Petrillo. &#8220;If they are unable to identify the product, then it may be a good idea to return the product or throw it away.&#8221;\n<\/p>\n<h2 id=\"mntl-sc-block_8-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> How Long Do Shampoo and Conditioner Last Before Expiring? <\/span><\/h2>\n<p id=\"mntl-sc-block_9-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Most shampoo and conditioner lasts at least six months or longer, though the specifics vary from one product to the next. An open bottle of shampoo or conditioner usually lasts between six months and a year, Petrillo says\u2014but if the bottle hasn&#8217;t been opened, it may last up to two or three years. &#8220;You will want to look for a PAO (period after opening) date, which is usually labeled as 6M, 12M, 18M, or 24M,&#8221; Petrillo says. &#8220;The M stands for months, and this should tell you how long the product is good for after you&#8217;ve opened it, as long as it&#8217;s stored in proper conditions.<\/p>\n<h2 id=\"mntl-sc-block_11-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> Is Okay to Use Expired Shampoo? <\/span><\/h2>\n<p id=\"mntl-sc-block_12-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> When shampoo and conditioner expire, they can become unstable, so you shouldn&#8217;t use them. The product may not only lose its effectiveness, but it could also irritate your skin or be harmful in other ways. &#8220;If the product is expired, chances are it is very unstable and ingredients are separated with potential bacteria contamination, which can lead to irritation, dryness, peeling, damage to follicles, and possible hair loss, to name a few,&#8221; Petrillo says.\n<\/p>\n<p id=\"mntl-sc-block_14-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Rarely, the degraded or unstable ingredients in expired shampoo and conditioner can cause a rash. &#8220;Sometimes, when the formula is no longer stable, it can grow mold too,&#8221; says board-certified dermatologist David Kim, MD.The rash is often in the form of contact dermatitis, which is an itchy, painful, or swollen rash that appears when someone comes into contact with something they&#8217;re allergic to or that irritates their skin.<\/p>\n<p id=\"mntl-sc-block_16-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> The main reason to avoid expired shampoo and conditioner is so that you&#8217;re not in contact with the product&#8217;s ingredients, which may no longer be stable. &#8220;It is never a good idea to use expired shampoo or conditioner, as it can be harmful to apply when the ingredients have been separated and the preservatives are no longer effective,&#8221; Petrillo says. &#8220;There could be potential contamination and harmful microorganisms [that] have developed that you do not want absorbed into your hair or scalp.&#8221; Shampoo and conditioner ingredients can penetrate your scalp fairly quickly, so expired shampoo or conditioner can have negative side effects even if they&#8217;re only applied briefly<em>. <\/em><\/p>\n<h2 id=\"mntl-sc-block_18-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> Signs of Expiration in Shampoo or Conditioner <\/span><\/h2>\n<p id=\"mntl-sc-block_19-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> One way to tell if your shampoo or conditioner has expired is to check the expiration date listed on the package. &#8220;The bottle usually has a &#8216;period after opening&#8217; logo, which is a logo that looks like a tiny container or jar with a number,&#8221; Kim says. &#8220;If it says 24M, it means the product is good for 24 months after opening.&#8221; You can also keep an eye out for physical changes to the product, as your shampoo or conditioner may have expired if the product is clumpy, separating, or the color has changed. Here are some specific signs of expiration that Petrillo recommends looking out for:\n<\/p>\n<ul id=\"mntl-sc-block_21-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\">\n<li><strong>Separating ingredients:<\/strong> &#8220;This means some of the chemical components have separated,&#8221; Petrillo says. &#8220;When this happens, you will usually see chemicals separated into layers, such as the oil components at the top and water components in a separate\u00a0layer.&#8221; If you pour out some of the shampoo or conditioner, you&#8217;ll probably notice the separating ingredients right away.\n<\/li>\n<li><strong>Changes in texture or color:<\/strong> This sign of expired shampoo or conditioner will most likely appear off or unnatural-looking, such as a clumpy texture or a new color. &#8220;The preservatives are most likely not effective and the product is no longer stable, so you may notice color change or discoloration,&#8221; Petrillo says.\n<\/li>\n<li><strong>Unpleasant smell:<\/strong> &#8220;If you notice a bad smell or unnatural odor to the product, this is something you may want to confirm with the brand or manufacturer,&#8221; Petrillo says.<\/li>\n<\/ul>\n<p id=\"mntl-sc-block_23-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> If the shampoo or conditioner&#8217;s consistency seems off (such as when the product is separating), you may be tempted to shake the bottle to mix the ingredients back together, but that&#8217;s actually not a great idea. It won&#8217;t mix well or maintain the same consistency it had when manufactured, and it also probably won&#8217;t penetrate the scalp the way it&#8217;s intended to, Petrillo says.<\/p>\n<h2 id=\"mntl-sc-block_25-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> The Final Takeaway <\/span><\/h2>\n<p id=\"mntl-sc-block_26-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Shampoo and conditioner can both expire, and when they do, you should avoid using them. Expired shampoo and conditioner can be harmful to your health, and they also may no longer be effective. Once open, most shampoo and conditioner lasts between six months and a year, but unopened bottles can last longer. To avoid wasting product, make note of the packaging&#8217;s period after opening date upon first purchase, and do your best to use all of the shampoo or conditioner by that time.<\/p>\n<\/div>\n<div id=\"citation-sources_1-0\" class=\"comp citation-sources mntl-article-sources mntl-expandable-block u-article-styles\" data-scroll-offset=\"70\">\n<div class=\"loc toggle-content\">\n<div id=\"mntl-article-sources__wrapper_1-0\" class=\"comp mntl-article-sources__wrapper mntl-block\" data-click-tracked=\"true\"><span id=\"mntl-article-sources__heading_1-0\" class=\"comp mntl-article-sources__heading mntl-text-block\">Article Sources<\/span><\/div>\n<\/div>\n<div class=\"loc expandable-content\">\n<div id=\"citation-sources__text_1-0\" class=\"comp citation-sources__text mntl-text-block\">Byrdie takes every opportunity to use high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial guidelines to learn more about how we keep our content accurate, reliable and trustworthy.<\/div>\n<div id=\"mntl-article-sources__citation-sources_1-0\" class=\"comp mntl-article-sources__citation-sources mntl-citation-sources mntl-sources\" data-tracking-container=\"true\">\n<ol class=\"mntl-sources__content\">\n<li class=\"mntl-sources__source\" id=\"citation-1\">\n<p>Contact dermatitis &#8211; Symptoms and causes. Mayo Clinic.<\/p>\n<\/li>\n<\/ol>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"mntl-sc-page_1-0\" class=\"comp mntl-sc-page mntl-block\" data-sc-sticky-offset=\"125\" data-sc-ad-label-height=\"16\" data-sc-ad-track-spacing=\"100\" data-sc-min-track-height=\"250\" data-sc-max-track-height=\"600\" data-sc-breakpoint=\"50em\" data-sc-load-immediate=\"5\" data-sc-content-positions=\"[1, 1250, 1, 1, 1, 1, 1, 1, 1]\" data-bind-scroll-on-start=\"true\">\n<div id=\"mntl-sc-block_1-0\" class=\"comp mntl-sc-block beauty-sc-block-callout--finalverdict beauty-sc-block-callout mntl-sc-block-callout mntl-block theme-finalverdict\" data-tracking-id=\"mntl-sc-block-callout\" data-tracking-container=\"true\">\n<p id=\"mntl-sc-block-callout-heading_1-0\" class=\"comp mntl-sc-block-callout-heading mntl-text-block\">Key Takeaways<\/p>\n<div id=\"mntl-sc-block-callout-body_1-0\" class=\"comp mntl-sc-block-callout-body mntl-text-block\">\n<ul>\n<li>\n<p>Shampoo and conditioner can become unstable and potentially irritating once they&#8217;ve expired.<\/p>\n<\/li>\n<li>\n<p>Opened shampoo and conditioner typically expire within six months to a year, while unopened bottles can last longer.<\/p>\n<\/li>\n<li>\n<p>Expired hair products may have signs like separating ingredients, a bad smell, or changes in texture or color.<\/p>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p id=\"mntl-sc-block_2-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Maybe you only shampoo and condition your hair once a week, or perhaps you rotate through many different products. In either case, a bottle of shampoo or conditioner may last you a really long time. This can be great in some ways, but it also raises one big question that many people never really think about: Do shampoo and conditioner expire? It turns out that yes, shampoo and conditioner both expire, and when they do, it&#8217;s not a great idea to use either product. <strong>Ahead, a dermatologist and a cosmetic chemist explain all you need to know about shampoo and conditioner expiration, including signs of when to toss your bottle.<\/strong><\/p>\n<div id=\"mntl-sc-block_4-0\" class=\"comp mntl-sc-block beauty-sc-block-callout--meetourexpert beauty-sc-block-callout mntl-sc-block-callout mntl-block theme-meetourexpert\" data-tracking-id=\"mntl-sc-block-callout\" data-tracking-container=\"true\">\n<p id=\"mntl-sc-block-callout-heading_2-0\" class=\"comp mntl-sc-block-callout-heading mntl-text-block\">Meet the Experts<\/p>\n<div id=\"mntl-sc-block-callout-body_2-0\" class=\"comp mntl-sc-block-callout-body mntl-text-block\">\n<ul>\n<li>David Kim, MD, is a board-certified dermatologist at Idriss Dermatology in New York City. He is also the Founder of LIGHTSAVER.<\/li>\n<li>David Petrillo, is a cosmetic skincare chemist and the founder of Perfect Image, a skincare brand focused on providing professional-grade peels and other products to consumers at an accessible price point.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<h2 id=\"mntl-sc-block_5-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> Do Shampoo and Conditioner Expire? <\/span><\/h2>\n<p id=\"mntl-sc-block_6-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"><strong>The answer here is simple: Yes, shampoo and conditioner can both expire.<\/strong> This means you should be on the lookout for the product&#8217;s expiration date and any signs that it may have passed its prime. Typically, the expiration date is listed on the bottle or somewhere on the packaging\u2014you may need to look at the box it came in. If you can&#8217;t find that information, try getting in touch with the company who made the product. &#8220;It would be a good idea to reach out to the manufacturer to get some additional information on batch identification or when it expires,&#8221; says cosmetic skincare chemist David Petrillo. &#8220;If they are unable to identify the product, then it may be a good idea to return the product or throw it away.&#8221;\n<\/p>\n<h2 id=\"mntl-sc-block_8-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> How Long Do Shampoo and Conditioner Last Before Expiring? <\/span><\/h2>\n<p id=\"mntl-sc-block_9-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Most shampoo and conditioner lasts at least six months or longer, though the specifics vary from one product to the next. An open bottle of shampoo or conditioner usually lasts between six months and a year, Petrillo says\u2014but if the bottle hasn&#8217;t been opened, it may last up to two or three years. &#8220;You will want to look for a PAO (period after opening) date, which is usually labeled as 6M, 12M, 18M, or 24M,&#8221; Petrillo says. &#8220;The M stands for months, and this should tell you how long the product is good for after you&#8217;ve opened it, as long as it&#8217;s stored in proper conditions.<\/p>\n<h2 id=\"mntl-sc-block_11-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> Is Okay to Use Expired Shampoo? <\/span><\/h2>\n<p id=\"mntl-sc-block_12-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> When shampoo and conditioner expire, they can become unstable, so you shouldn&#8217;t use them. The product may not only lose its effectiveness, but it could also irritate your skin or be harmful in other ways. &#8220;If the product is expired, chances are it is very unstable and ingredients are separated with potential bacteria contamination, which can lead to irritation, dryness, peeling, damage to follicles, and possible hair loss, to name a few,&#8221; Petrillo says.\n<\/p>\n<p id=\"mntl-sc-block_14-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Rarely, the degraded or unstable ingredients in expired shampoo and conditioner can cause a rash. &#8220;Sometimes, when the formula is no longer stable, it can grow mold too,&#8221; says board-certified dermatologist David Kim, MD.The rash is often in the form of contact dermatitis, which is an itchy, painful, or swollen rash that appears when someone comes into contact with something they&#8217;re allergic to or that irritates their skin.<\/p>\n<p id=\"mntl-sc-block_16-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> The main reason to avoid expired shampoo and conditioner is so that you&#8217;re not in contact with the product&#8217;s ingredients, which may no longer be stable. &#8220;It is never a good idea to use expired shampoo or conditioner, as it can be harmful to apply when the ingredients have been separated and the preservatives are no longer effective,&#8221; Petrillo says. &#8220;There could be potential contamination and harmful microorganisms [that] have developed that you do not want absorbed into your hair or scalp.&#8221; Shampoo and conditioner ingredients can penetrate your scalp fairly quickly, so expired shampoo or conditioner can have negative side effects even if they&#8217;re only applied briefly<em>. <\/em><\/p>\n<h2 id=\"mntl-sc-block_18-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> Signs of Expiration in Shampoo or Conditioner <\/span><\/h2>\n<p id=\"mntl-sc-block_19-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> One way to tell if your shampoo or conditioner has expired is to check the expiration date listed on the package. &#8220;The bottle usually has a &#8216;period after opening&#8217; logo, which is a logo that looks like a tiny container or jar with a number,&#8221; Kim says. &#8220;If it says 24M, it means the product is good for 24 months after opening.&#8221; You can also keep an eye out for physical changes to the product, as your shampoo or conditioner may have expired if the product is clumpy, separating, or the color has changed. Here are some specific signs of expiration that Petrillo recommends looking out for:\n<\/p>\n<ul id=\"mntl-sc-block_21-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\">\n<li><strong>Separating ingredients:<\/strong> &#8220;This means some of the chemical components have separated,&#8221; Petrillo says. &#8220;When this happens, you will usually see chemicals separated into layers, such as the oil components at the top and water components in a separate\u00a0layer.&#8221; If you pour out some of the shampoo or conditioner, you&#8217;ll probably notice the separating ingredients right away.\n<\/li>\n<li><strong>Changes in texture or color:<\/strong> This sign of expired shampoo or conditioner will most likely appear off or unnatural-looking, such as a clumpy texture or a new color. &#8220;The preservatives are most likely not effective and the product is no longer stable, so you may notice color change or discoloration,&#8221; Petrillo says.\n<\/li>\n<li><strong>Unpleasant smell:<\/strong> &#8220;If you notice a bad smell or unnatural odor to the product, this is something you may want to confirm with the brand or manufacturer,&#8221; Petrillo says.<\/li>\n<\/ul>\n<p id=\"mntl-sc-block_23-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> If the shampoo or conditioner&#8217;s consistency seems off (such as when the product is separating), you may be tempted to shake the bottle to mix the ingredients back together, but that&#8217;s actually not a great idea. It won&#8217;t mix well or maintain the same consistency it had when manufactured, and it also probably won&#8217;t penetrate the scalp the way it&#8217;s intended to, Petrillo says.<\/p>\n<h2 id=\"mntl-sc-block_25-0\" class=\"comp mntl-sc-block beauty-sc-block-heading mntl-sc-block-heading\"><span class=\"mntl-sc-block-heading__text text-title-300\"> The Final Takeaway <\/span><\/h2>\n<p id=\"mntl-sc-block_26-0\" class=\"comp mntl-sc-block beauty-sc-block-html mntl-sc-block-html\"> Shampoo and conditioner can both expire, and when they do, you should avoid using them. Expired shampoo and conditioner can be harmful to your health, and they also may no longer be effective. Once open, most shampoo and conditioner lasts between six months and a year, but unopened bottles can last longer. To avoid wasting product, make note of the packaging&#8217;s period after opening date upon first purchase, and do your best to use all of the shampoo or conditioner by that time.<\/p>\n<\/div>\n<p> Source URL: https:\/\/www.byrdie.com\/can-shampoo-expire-11881367<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Shampoo in Your Shower May Past Its Prime\u2014Here&#8217;s How to Tell When It&#8217;s Expired Time to toss. By Beth Krietsch Beth Krietsch Beth Krietsch is a health and food writer with a Masters&#8217;s Degree in Public Health Nutrition. She covers wellness for Byrdie, with an emphasis on food and nutrition. Byrdie&#8217;s Editorial Guidelines Published [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1697678,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[83,226],"class_list":["post-1697676","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-politics","tag-byrdie-com","tag-crawlmanager"],"_links":{"self":[{"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/posts\/1697676","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1697676"}],"version-history":[{"count":0,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/posts\/1697676\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=\/wp\/v2\/media\/1697678"}],"wp:attachment":[{"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1697676"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1697676"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/analyse.optim.biz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1697676"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}