Alpha Hydroxy Acid (AHA) Kevin Nicholls 12/01/2021 521 ViewsA group of natural, mild acids found in foods. They are used in skin conditions such as dryness, aging, or acne. They also encourage desquamation by removing the layer of dead skin cells from the surface of the skin. Related Articles: Nail Care in the Caveman EraGlossary: Citric acidGlossary: Glycolic acidGlossary: Lactic acid