INCI · other · CIR review pending · used in 1 products
Leucine(800 Ppm)
Leucine is an essential branched-chain amino acid used in cosmetic formulations, typically at low concentrations such as 800 ppm. It appears across a wide range of product types including toners, serums, shampoos, and moisturizers. As a naturally occurring amino acid, it is considered a skin-compatible ingredient.
Evidence level
weakEWG score
—Comedogenic
—Category
other● Benefits
Amino acids like leucine are generally associated with supporting the skin's natural moisturizing factors and barrier function. However, the source page does not provide specific clinical benefit claims for leucine as a cosmetic ingredient.
hydratingbarrier-support
● Cautions
