Like food and medicine, beauty products don’t last forever. Cosmetic chemists suggest looking for three key things to determine its expiration date and suggest ways to maintain its shelf life.

Expiration dates are there to provide a general timeline for best usage. If you’ve properly stored an unopened product, you ...

Navigate the world of food expiration by diving into the subtleties of "sell-by" versus "use-by" dates — and discovering foods with distinct use-by recommendations.

Medically reviewed by Patricia Mikula, PharmD Like other medicines and food, vitamins often have an expiration date. Vitamins ...

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For FDA-approved sunscreens, consumers can expect to find expiration date labels printed right on the packaging with an "EXP" marker followed by the month and year.

This date tells you how long the product is good for if it isn’t opened. While the product may still work after this date, it may be less effective. The other hair dye expiration date is usually ...

Unfortunately, cosmetics are not required to have expiration dates, says Homer Swei, PhD, senior vice president of Healthy Living Science at the Environmental Working Group.

The decision about what type of expiration date to place on a food product lies with the manufacturer, said the U.S. Department of Agriculture.

From a consumer perspective, this is important for several reasons. “If a product goes bad before the expiration date, the consumer can claim a refund,” Dr. Diez-Gonzalez says.

For example, a food producer may survey consumers in a focus group to pick a "use by" date that is six months after the product was produced because 60% of the focus group no longer liked the taste.

How to find expiration dates on products. Cosmetics are not required to have expiration dates printed on labels in the US. The good news is that many products do anyway. ...