L-Cysteine HCl Anhydrous is the hydrochloride salt of the amino acid L-cysteine, produced in an anhydrous crystalline form. It is widely used as a nutritional supplement, antioxidant, and stabilizer in food, pharmaceuticals, and cosmetics. Known for its role in protein synthesis and detoxification, it also serves as a precursor for glutathione production. Its high purity and stability make it suitable for clinical, nutraceutical, and industrial applications.