The PAO was introduced on cosmetics labels in 2005 by the European Commission, which requires all cosmetic products with a shelf life of 30 months or more to feature the symbol.

Once you locate the expiration date symbol, ... it does reveal that your makeup will last a certain amount of months after opening it. 24M = 24 months; 6M = six months.

Expiration; lipstick: 18–24 months: lip gloss: 12–18 months: foundation & concealer: 12–18 months: ... To find the expiration, look for the PAO symbol stamped on the product or its packaging ...

This symbol means the product is good for 24 months after opening. Chloe Pantazi/Insider If you can't find an expiration date, your sunscreen is likely good for up to three years.

Shampoo products aren't required to have an expiration date, ... you’ll see a symbol that looks like a small ... at around 3 months, and lipstick the last, at around 18 to 24 months, according ...