From our colleagues at Beauty High, a great run-down on "acids" (ascorbic; ferulic; glycolic; etc.):
Acids in Your Skincare Products: What They Are and Why They Work
If you cringe a little when you hear the word “acid” used in the same sentence as “your face,” we don’t blame you! Yet even though it might make you think of a high school lab experiment gone wrong, acids in skin care products are actually pretty stellar ingredients. These complexion-boosting stars can unclog pores, minimize discoloration and hyperpigmentation, smooth fine lines and wrinkles and treat acne. Read on to see how the most common acids in our beauty products can get you one step closer to skin nirvana.
Continue reading here: http://bit.ly/1ujY9rn