USA

100 Tablets Net Weight 91 g. Cysteine is a non-essential sulfur amino acid, which plays a critical role in methionine, taurine e and glutathione m metabolism. It is also an important component of hair, nails and the keratin of the skin. Cysteine stabilizes protein structure and aids in the formation of collagen, being thereby indispensable to skin, hair and nail health. Natural color variation may occur in this product"