Combination of Cynateine HNS, B-complex vitamns and zinc. Keratin is the main building element of hair and nails and makes 80% od chemical composition of hair. Keratin which builds hair and nails consists of amino acids chained into alpha-helix. It contains larger quantities of amino acid cysteine bound by disulphide bonds which makes up cystine. Double bonds connect keratin chains transversely. Number of bonds depends on the type of hair, and a larger number ensures better strength and resistance to chemicals and mechanical damage. Liquid form of keratin ensures faster absorption and larger usability, which contributes to the beauty of your skin in the long term.