Glycolic acid is a type of AHA peel that comes from fruit and milk sugars. Most glycolic acid peels have a concentration of 50 percent or higher. Glycolic peels (also known as alpha hydroxy acid peels) are the most gentle of the chemical peels. They only penetrate the top layer of skin, sloughing off dead skin cells. Learn more about chemical peels here: https://masterpieceskinrestoration.com/blog/chemical-peels/