AHA (alpha hydroxy acid): Skin is exfoliated chemically instead of mechanically via abrasion, dries and increases skin aging. Supposed to be anti-wrinkle, found in many skin and hair care products. Used as a solvent originally in cleaning compounds and for tanning leather. A smooth finish is developed by stripping the outer layer of the epidermis, which causes the irritated skin to puff up and thus fill in the lines and wrinkles. The FDA warns that strengths over 3% may thin the skin.

Acetamide MEA: Used in lipsticks and cream blusher to retain moisture. Causes adverse reactions, and is toxic, carcinogenic, and mutagenic.

Alkyl-phenol-ethoxylades: Has been found to reduce male sperm count, and to mimic estrogen in the body. It is widely used in shampoo, causes adverse reactions and has been shown to be toxic, mutagenic and carcinogenic.