Mandelic Acid derived from bitter almonds. M.A. induces less redness, flaking and skin irritation. Mandelic Acid is a better choice for people with lots of pigment. Mandelic also provides excellent results when used in the treatment of acne. It can improve inflammatory pustular, comedonal, and papular acne and has been shown to be effective even in individuals resistant to antibiotics. Mandelic has a larger molecular structure than glycolic acid making it less harsh and better tolerated on the skin. Mandelic is known to be a less harsh alternative to Glycolic Acid and Salicylic Acid.