L-histidine

When applied to the skin, histidine acts as a powerful scavenger of hydroxyl radicals—highly reactive molecules that contribute to oxidative stress on the skin’s surface. It supports skin hydration by boosting natural moisturizing factors and enhancing the skin’s ability to resist environmental stressors. In hair care, histidine functions as an effective chelating agent, binding to and helping remove mineral deposits and impurities from hard water, product buildup, and chlorine. This helps prevent dryness, brittleness, and breakage caused by excess minerals. By reducing copper accumulation in the hair, histidine also helps protect against UV damage and maintains hair strength and integrity.