Glycolic acid is a widely used, water-soluble alpha hydroxy acid (AHA), usually derived from sugar cane, it can be naturally found in foods.
Glycolic acid works by exfoliating the skin, dissolving dead skin cells and excess oils, revealing newer, healthier skin, and may also help reverse sun damage to the skin.
In small percentages, it can be used daily. However, some products should not be used more than 1 or 2 times per week (see the respective how-to's).
Glycolic Acid is colorless and odorless.