Glycolic Acid is known best for having the smallest molecular structure of all the Alpha Hydroxy Acids. Due to this small size, it is also the most effective for penetration potential. ZENMED Glycolic Booster helps to renew the skin, preventing build-up of dead skin cells that can lead to a dull complexion. Used as the first step in an anti-aging skincare routine, this formulation will quickly provide an improvement to your complexion. Ideal for all skin types.