PHENYLALANINE
What is PHENYLALANINE?
L-Phenylalanine is a naturally occurring essential amino acid and the L-enantiomer of phenylalanine, often used in skincare for its role in melanin synthesis and pigmentation modulation. It works by competitively inhibiting tyrosinase, the key enzyme in melanin production, helping to reduce hyperpigmentation and even out skin tone. In formulations, it appears as a white crystalline powder, soluble in water, and is valued for its gentle, non-irritating properties in brightening products.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
Antioxidant
Slows oxidation of oils, fragrances, and sensitive actives to improve shelf life and reduce rancidity or color change; sometimes also supports skin protection from oxidative stress.