Cosmetic Grade 70% Glycolic Acid Peel Concentrate (30ml)We stock a 70 % Glycolic acid, which is a potent formula. We do not recommend using directly on skin, rather reduce the percentage as per the guidelines included prior to performing this peel. Glycolic acid is a member of the alpha hydroxy acid (AHA) family, and is the smallest AHA molecules, allowing it to penetrate deeper into the skin. It is commonly used as a toner and chemical peel in concentrations of around 10% for home use, and 20 80% for use