The heart of the GLY DERM® line is glycolic acid, an alpha-hydroxy acid. Glycolic acid works by penetrating the skin to help remove and exfoliate the dry uppermost layer, leaving skin looking smoother, healthier and younger looking! The glycolic acid used in GLY DERM® products is esterified - a unique process that enables us to deliver full-potency glycolic acid without the irritation that is often associated with this natural alpha-hydroxy acid. We think that once you discover GLY DERM®, it will make a world of difference to the health and beauty of your skin.