(SW1527)Keratin 50 mg 60 CapsPure keratin vitamins Made from Tibetan wool Promotes healthy joints, skin, hair and nails Keratins are a group of tough, fibrous proteins that help maintain healthy joints and support skin, hair and nails. Keratins deliver an exceptionally high content of the amino acid cysteine, which is in itself an abundant source of sulfur molecules that nourish and strengthen cartilage tissues. When the sulfur molecules from cysteine bond together they form very