If you’re having concerns with your skin, about acne or dryness or the damage from aging—meaning, if you're essentially a human who wants to look good—then you want to add some acid to your grooming regimen. Acids are seemingly everywhere in skin care these days. And for good reason. They work by helping you get new, healthy skin quicker through a process dermatologists call “turnover.” After all, fresh new skin will always be better than old, dead skin, right? But acids can be intimidating. Especially when so many of us associate the stuff with bubbling chemical burns. But in reality, these highly effective acids are safe but you should know how to use them. To help you target your concern, we've outlined the most popular acids below, along the with recommended products to try.