L-Cystine Free Base is a sulfur-containing non-essential amino acid formed by the oxidation of two L-cysteine molecules. It plays a critical role in protein structure, hair, skin, and nail health by forming disulfide bonds. This ingredient is used in pharmaceuticals, nutraceuticals, and cosmetic formulations for its antioxidant properties and to support keratin production. Its high-purity form ensures suitability for clinical, dietary, and cosmetic applications.
