Solaray Hair Nutrients Advanced Hair Health Formula VegCap is a food supplement in the form of vegetable capsules based on vitamins, minerals and amino acids. This food supplement is a unique and complete combination to provide all the elements necessary for integuments such as hair, nails and eyelashes thanks to the action of L-Cysteine and a complex of vitamins and minerals. Keratin is one of the most abundant proteins in the skin and the hair containing high amounts of L-Cysteine as building blocks. L-Cysteine forms disulfide bridges, which hold together the keratin strands within the hair and provides the hair with its fibrous properties that hold on to moisture and prevent hair dryness. L-Cysteine hence provide strength and rigidity to keratin, thus help to strengthen hair and slows down hair loss.