Cocamidopropyl Betaine

A mild surfactant used for cleansing and foaming. Cocamidopropyl Betaine (CAPB) is an amphoteric surfactant that functions primarily by reducing the surface tension of water, enabling the emulsification of oils and dirt for effective cleansing. Its zwitterionic nature allows it to interact with both anionic and cationic moieties, stabilizing foam and improving the viscosity of formulations. In skin, it is considered milder than many anionic surfactants, reducing the potential for excessive protein denaturation and lipid extraction from the stratum corneum, thus helping to mitigate skin barrier disruption during washing.

The Cosmetic Ingredient Review (CIR) Expert Panel has assessed Cocamidopropyl Betaine as safe in cosmetics when formulated to be non-irritating. While historically associated with sensitization due to impurities like amidoamine and dimethylaminopropylamine, modern manufacturing processes have significantly reduced these impurities, thereby lowering the risk, though some individuals may still exhibit sensitivity.

Look for products with Typically used at 4-30% (as supplied, 30-35% active solution) in rinse-off cosmetic formulations. Active concentrations in finished products often range from 1-10%. for clinical efficacy.