Like anything that seems too good to be true, most of the claims made by over-the-counter skin-care products probably are. Because products like moisturizers, night creams, and foundation with supposed anti-aging properties are categorized as cosmetics, not drugs, their marketing claims are not held to the same level of scrutiny that medicines are. They may not even be required to undergo scientific trials at all.

That’s not to say everything on the market is a waste of your money and hope, however. We spoke to board-certified dermatologists to find out what can actually help stave off wrinkles and other signs of aging – and what you shouldn’t bother with.