Solaray Hair nutrients Enriched with L-cysteine Food supplement 60 capsules Hair Nutrients is a unique and complete combination that provides all the necessary elements for hair, nails and eyelashes thanks to the action of L-cysteine ​​and a complex of Vitamins and Minerals. L-cysteine ​​is a non-essential sulfur amino acid, as it can be synthesized by the liver. L-cysteine ​​promotes hair growth and fights hair loss. L-cysteine ​​is a precursor of glutathione, which is formed in the body and has very effective antioxidant properties.