Lactic Acid (another AHA and you guessed it, exfoliant) is a little more gentle than it’s cousin Glycolic Acid when faced with the task of removing dead skin cells, but it sports many of the same benefits. When applied topically Glycolic Acid will hydrate and even skin texture, suspend signs of ageing, and tackle mild acne. Your introduction to this popular AHA starts with The Ordinary’s Lactic Acid 5% +ha 2%.