The types of chemicals used in a peel treatment can vary depending on the depth of penetration.  For example, light peels typically involve alpha-hydroxy or salicylic acids which can help exfoliate the outer layer of skin to refresh one’s appearance, reduce dryness, balance skin tone, as well as diminish wrinkles.  Medium peels use chemicals like glycolic acid to penetrate both the outer and middle layers of skin. This penetration helps take the effects of a light peel to a deeper level.  Deep peels use stronger chemicals—such as carbolic and trichloroacetic acids—to break down cells to alleviate skin concerns affecting the deepest level of skin. It might help reduce deep wrinkles, scars, and sun damage.