Updated 06/04/21. We’ve all been there—you buy a new skincare product only to use it a handful of times before the novelty wears off. It gets shuffled to the back of your cabinet or to the bottom of your drawer where it collects dust. One day, as you’re sorting through your things, you rediscover it. That’s when the inevitable question arises. Is it still safe to use? Keep reading to learn all about skincare expiration, including how to read dates and symbols, how to tell if a product is past its prime, and how to extend the life of your favorite formulas.
How to Read Expiration Dates on Skincare Products
The first thing you need to know is that skincare products are classified as cosmetics by the Food & Drug Administration (FDA), not drugs. This means that companies in the U.S. (and Canada) aren’t required by law to display expiration dates on their products. However, there are a couple of exceptions to that rule, and one is sunscreen, which is considered a drug since it serves a medical purpose. According to the FDA, sunscreen MUST list an expiration date on the packaging—unless it’s been proven to stay stable up to three years. Because sunscreen is critical to preserving skin health, it’s important to follow the expiration dates on sunscreen closely. If your sunscreen doesn’t come with an expiration date, use it up or throw it out after three years.
For brands that do indicate a shelf life on a skincare product, you can find a symbol on the packaging. There are two main symbols used to indicate how long a skincare product will last. Both symbols are required in the European Union (EU), but some companies in the U.S. choose to include them on their packaging too, especially if they sell their products in Europe.
- Period After Opening (PAO): This symbol tells you how long a product will stay good after it’s been opened. It looks like a little open jar with a number followed either by the word ‘months’ or the letter ‘M.’ For example, ’18M’ indicates the product will stay good for a year and a half once it’s been opened.
- Best Before End Of (BBE): This symbol tells you the date by which a product should be used, just like expiration dates on our food. It looks like a little hourglass followed by a date. It’s a calculated date conducted through stability testing that mimics all of the conditions a product may go through in its aging process.
The challenge with vague expiration symbols like the PAO symbol (and the reason I’m not always a fan) is that there’s no way for them to be 100 percent accurate. For example, storage conditions play a big role in impacting the PAO symbol. Did you leave the lid off? Was it exposed to the hot sun? Did you keep it in your car? All of these things could potentially cause a product to expire faster than the PAO symbol initially indicated. Because of this, you can’t totally rely on these symbols. To tell if a product has gone bad, I prefer using common sense and personal judgment, inspecting a product for any visible or olfactory changes.
How to Tell If a Skincare Product Has Expired
Regardless of whether or not a product has an expiration date or symbol on the packaging, it’s important to know that they don’t last forever. Most skincare products guarantee safety and freshness for two years, although some can last up to three years and others can last less (especially if they’re organic products). With all this variation, how can you tell if a skincare product has really expired? Here are the steps you can take to find out.
- Check for an Expiration Date: The first and most obvious step is to check for an expiration date or symbol, although, as I already mentioned, not all skincare products will have one, nor can you safely rely on them. If a product does have one, however, it can give you a clue as to its current state. Regardless, move on to step two.
- Change in Consistency: It’s time to take note of a product’s consistency. Is it thinner than it was when you originally opened it? Are the ingredients separating? Does the product simply look strange? Is there mold growing on it? Yikes. If that’s the case, toss it.
- Change in Color: After checking the consistency of the product, check its color. Has the color changed, such as from white to yellow or light brown? This is especially common with L-ascorbic acid, a notoriously unstable form of vitamin C.
- Change in Scent: The final checkpoint is the scent of the product. Does the product smell differently than it did when you purchased it? Does it smell rancid or just, well, not pleasant? If so, it’s time to toss it.
What Happens If You Use Expired Skincare?
Luckily, most reputable skincare products use a robust preservative system to ensure they won’t become dangerous to use, even if you’re using it past the standard two-year window. “Natural” products that don’t use preservatives are the exception. These can potentially grow mold or bacteria, which you definitely don’t want to introduce to your skin.
Generally speaking, the biggest issue you’ll face when using expired skincare products is the loss of efficacy. The extent to which this happens depends on the product. I’ll use unstable forms of vitamin C for example. These unstable forms, such as pure ascorbic or L-ascorbic acids, can oxidize fairly quickly after being exposed to air. Once this happens, they no longer deliver the same antioxidant activity, which means your skin receives far fewer benefits. The same thing goes for products that contain enzymes. Over time, they can become inactive.
Aside from risking the loss of efficacy, you could also be risking free radical exposure when you use rancid skincare products. When oils and active ingredients oxidize, they generate free radicals, so they could actually be doing more harm than good!
Well-formulated products also use pH adjusters to keep them stable, but these can wear off after a while, resulting in changes to pH level. This can increase the risk of irritation or it simply may make a product less effective. All things considered, I recommend using a product up within 12 to 18 months of opening it for maximum results (and to get the most bang for your buck).
How to Get the Longest Life Out Of Your Skincare Products
Skincare products may not last forever, but I’ve picked up a few tips and tricks for making them last as long as possible. Here they are, from me to you!
- Write the Purchase Date on the Bottom of The Product. Whether or not the packaging includes a PAO symbol, the difficulty is remembering when you opened it. What good is it knowing a product will last 18 months after opening if you’re not sure when you opened it? Writing the date on the bottom of a product is a foolproof way to remember and keep tabs on a product’s efficacy.
- Keep Your Products Away From Light and Heat. This definitely helps preserve your products longer, since many active ingredients can become compromised by light and/or heat exposure. That’s why it’s always a good idea to keep your skincare products in a drawer or cabinet, away from direct sunlight.
- Wash Your Hands Before Dipping Your Fingers Into a Jar. Most skincare products should be formulated with a strong preservative system, so you shouldn’t worry about using your fingers to pick a cream or masque out of a jar (there’s really no need for those skincare spatulas that have become so popular). That said, it’s always a good idea to make sure your hands are clean first, so take the time to wash them. Learn more about whether it’s safe to use products in jars.
- Keep Caps Tightly Closed. It’s a fact that air can break down active ingredients more rapidly, so make sure the caps on your products remain tightly closed.
- Optional: Refrigerate Your Skincare Products. If you aren’t using a product on a regular basis, but you still want it to last, you can always store it in the refrigerator. This may help maintain its freshness. Learn more about which products are best to keep refrigerated.
Remember, it’s best to use a product within 12 to 18 months of opening it because this ensures the product is still safe and effective. If you haven’t been using a product and are wondering if it’s expired, I urge you to consider WHY you haven’t been using it. If it’s not the right fit for your skin type, don’t force it! Give it to a friend or family member or donate it. #ObeyRenee
Next, read the nine worst skin sins I’ve ever heard!
Celebrity Esthetician & Skincare Expert
As an esthetician trained in cosmetic chemistry, Renée Rouleau has spent 30 years researching skin, educating her audience, and building an award-winning line of products. Trusted by celebrities, editors, bloggers, and skincare obsessives around the globe, her vast real-world knowledge and constant research are why Marie Claire calls her “the most passionate skin practitioner we know.”