Is this skincare still good?
A straight answer about skincare shelf life, expiration dates
and that little open-jar symbol.
KEEP IT OR TOSS IT?
Does skincare expire? Yes.
Start here: has it been opened?
Somewhere in your bathroom, there is a product you are not sure about. Before you inspect the smell, search the batch code or guess how long it has been there, ask one question: has it been opened?
If it is unopened, check for a printed expiration or best-before date. If there is no date and its age is uncertain, contact the manufacturer with the batch code. A batch code can identify the production batch, but it is not an expiration date by itself.
If it has been opened, find the open-jar symbol, or PAO. A jar marked 6M means six months after opening, 12M means twelve and 24M means twenty-four. If the printed date or PAO has passed, the packaging is damaged or the product has changed unexpectedly, replace it. If you cannot remember when you opened it, the symbol cannot reconstruct the missing date.
READ THE LABEL
Four clues that answer four different questions.
| Clue | What it tells you | What it does not tell you |
|---|---|---|
| Expiration or best-before date | The calendar date provided by the manufacturer for the product as labeled | It does not tell you when you first opened the product |
| PAO or open-jar symbol | How long the product is intended to be used after first opening, such as 6M, 12M or 24M | It is not the manufacturing date, purchase date or unopened shelf life |
| Batch code | Which production batch the product came from; the manufacturer may use it to confirm production details | It is not an expiration date by itself |
| Unexpected changes | A different smell, color or texture, visible contamination, leaking or damaged packaging can be reasons to stop using it | Looking normal does not prove the product is still within its date or PAO |
The symbol remembers the rule.
You still have to remember the date.
Write the month and year on the container when you open it, or save it in your phone. It takes seconds and prevents the same bathroom investigation later.
The US Food and Drug Administration explains that cosmetic shelf life depends on the product, how it is used and how it is stored. Most US cosmetics are not required to display expiration dates. European cosmetics rules generally use a minimum-durability date for shorter-lived products and a PAO symbol for longer-lived products when the concept applies.
HAS IT GONE BAD?
If it smells strange or looks different,
stop.
An unexpected smell, a change in color or texture, visible contamination, or damaged or leaking packaging are reasons to stop using a product. Some formulas are designed to separate, so follow the label; a change the instructions do not explain is different.
If a product suddenly stings or irritates your skin, stop using it. That does not prove its age caused the reaction, and looking normal does not prove it is still within its labeled use period.
NO UNIVERSAL COUNTDOWN
The product name cannot tell you
its shelf life.
Two moisturizers are not guaranteed to last the same length of time simply because both are called moisturizers. Formula, packaging, manufacturing, testing, storage and use all matter. The same is true for serums, cleansers and eye creams. Generic online charts can offer rough conventions, but they cannot replace the date, PAO and instructions on the product in your hand.
The label comes first. If the label does not answer the question, ask the manufacturer. A confident internet estimate is still an estimate.
THE SUNSCREEN EXCEPTION
Sunscreen follows different rules.
In the United States, sunscreen is regulated as an over-the-counter drug rather than an ordinary cosmetic. Follow the printed expiration date and storage directions on the package. If it is expired, damaged or has changed unexpectedly, replace it.
THE BIGGER TIMING QUESTION
The symbol tells you when to stop.What tells you when it started?
New to you is not newly made. Your skincare was made, filled, shipped, stored and sold before it met your skin. That is normal; it simply means the formula’s timeline began before your routine did. Opening a ready-to-use product begins your use of it, not the formula itself. That is the question behind when should a treatment begin?
besTea is building Activated Skincare: a patent-pending format where face and body treatments stay dry until activated with ordinary water at the moment of use. It asks a different timing question: what if the treatment began when you did?
SKINCARE SHELF LIFE FAQ
What does 12M mean on skincare?
12M is a Period After Opening instruction. It means the product is intended to be used within twelve months of first opening, not twelve months from the date it was made or bought.
Is the PAO symbol the same as an expiration date?
No. An expiration or best-before date is a calendar date. PAO tells you how long to use a product after first opening. A 12M symbol is useful only if you know when those twelve months began.
Does skincare expire if it has never been opened?
Yes. Unopened skincare still has a shelf life. Check for a printed expiration or best-before date. If none appears and the product’s age is uncertain, contact the manufacturer with its batch code before using it.
What is a skincare batch code?
A batch code identifies the production lot a product came from. A manufacturer may use it to confirm production details, but the code is not automatically an expiration date and should not be treated as one without information from the manufacturer.
How do I tell if skincare has gone bad?
Do not use it if its smell, color or texture has changed unexpectedly, if you can see contamination, or if the packaging is damaged. Looking normal does not replace the printed date, PAO or product instructions.
What happens if I use expired skincare?
Nothing obvious may happen, but an old or changed product may not look or behave as intended and could irritate your skin. Stop using it if discomfort or a reaction occurs, and seek professional advice if the reaction is significant or persistent.
Does sunscreen expire?
Yes. Follow the printed expiration date and storage instructions on the package. In the United States, sunscreen is regulated as an over-the-counter drug and follows different expiration requirements from ordinary cosmetics.
Where should skincare be stored?
Follow the product directions. Keep caps closed, use clean hands or applicators, and avoid excessive heat, direct sunlight and excess moisture. Do not add water, dilute, refrigerate or decant a ready-to-use product unless its directions tell you to.
General consumer information only. Not medical advice. If a product causes a significant reaction, stop using it and seek advice from a qualified health professional.
Further reading: US Food and Drug Administration: Shelf Life and Expiration Dating of Cosmetics · Cosmetics Europe: Understanding the Label · EU Cosmetics Regulation
Last updated August 2026