Skinceuticals  C+AHA Exfoliating Antioxidant Treatment, 1-Ounce Bottle
C+AHA is a two-in-one antioxidant treatment that works by two different mechanisms to help improve the appearance of aging skin both inside and out. Below the surface, a 15% concentration of pure L-ascorbic acid helps protect against damaging UVA/UVB rays, prevent premature signs of aging, and stimulate collagen production. On the surface, a 10% concentration of hydroxy acids exfoliates to smooth the skin and create a more youthful appearance.