Arginine (Arginine)

Arginine is a skin- and hair-compatible amino acid widely used in cosmetic formulations for its conditioning, hydration-support, and formula-balancing benefits. As a naturally occurring component of the skin’s moisturizing factors, it helps promote a softer, more comfortable feel and can support improved suppleness when used in leave-on and rinse-off products. In addition, arginine is frequently utilized as a pH adjuster/buffering agent, helping optimize the performance and tolerance of systems such as exfoliating acids, preservative blends, and surfactant-based cleansers. In hair care, it can enhance smoothness and manageability and is often featured in strengthening or vitality concepts. Common applications include facial serums and creams, masks, cleansers, shampoos, conditioners, scalp treatments, and styling products, with use level tailored to the desired sensorial profile and the formulation’s pH strategy.