
In previous articles we discussed  the biology of the skin layers (or  epidermis) and the acid mantle. We  learned the acid mantle is a very  important part to skin health. It is  what protects our topmost layer of  skin from infection and intrusion of  harmful bacteria. Now we discuss  the more popular skincare acids in  detail and how they are used.
Who would want to put acid on their face? 
If you follow trends in skincare and skin products, you most likely   have seen numerous references to ‘acids’ – names like, Alpha Hydroxy   Acid, Glycolic Acid or Ascorbic Acid to name a few. While the term   “acid” may seem harmful or irritating, when used in the proper products   and in controlled amounts, it can actually heal and rejuvenate skin –   much the same way the acid mantle protects it. The trick in proper   skincare is to find the right balance between acid and alkaline   maintenance of the skin.
You may not know exactly what these acids do for your skin and how   they might help you. Understanding skincare ingredients is key to   selecting the right products for your unique skin type and skin   concerns.