PAO: how long does a cream last after opening

The PAO, the symbol of an open jar with a number and an “M”, indicates how many months a cosmetic product can be used after opening: “12M” means twelve months. It is found on products that, when unopened, last more than thirty months; those that last less have an expiration date instead.

How to read it

• The number next to the “M” indicates the number of months after opening: 6M, 12M, 24M.
• An hourglass, on the other hand, accompanies the date by which the product should be used.
• Tip: write the month you opened it on the packaging.

The most common timeframes

• Mascara: a few months, because it is used near the eyes.
• Creams and serums: often 6–12 months.
• Foundation and powder: from a few months to a year or more.
• Sunscreen: should be used within the indicated period and not stored from one summer to the next if it has expired.

What is written on the packaging always takes precedence.

When to throw it away sooner

If it changes color, smell, or consistency, if it separates, or if it irritates the skin. Heat, light, and fingers in the jar shorten a product’s lifespan: it is better to store it in a cool place and use a small spatula.

What about perfume?

Perfume is a different story: we discuss it in does perfume expire?.

Frequently asked questions

What does 12M on a cream mean?

That, once opened, the cream can be used for twelve months.

Does an unopened cream expire?

Yes, but more slowly: if it lasts less than thirty months, the packaging will show a date by which it should be used.