Glycolic acid is one of the oldest, most clinically proven ingredients in skin care for a good reason. Healthy skin functions best when it's free of dead skin cells, but as you age, your skin's ability to rejuvenate slows and the top layer of skin stays around longer than it should. This dead skin prevents your moisturizers and serums from performing to their fullest ability and results in more visibly pronounced signs of aging. We love glycolic acid because it very effectively removes dull, dead, uneven skin from the surface layer. A complex of soothing amino acids works in tandem with the glycolic acid to minimize irritation and visible redness that can sometimes be caused by exfoliation. This newly revealed, fresh skin retains moisture better and can more efficiently utilize the products that follow.