Whether it's in a serum, peel, or moisturizer, every skin care regimen should have glycolic acid—or at least another exfoliating acid like lactic or salicylic acid. These ingredients keep you looking ...

Glycolic acid is the baby of the (AHAs) family, which also includes lactic and malic acids. AHAs can be either synthetic or naturally occurring and glycolic sits in the latter category often being ...