NOW® Solutions Clinically Advanced Hair, Skin & Nails is formulated to nurture hair, skin, and nails from the inside. This product features Cynatine® HNS, a revolutionary patented and bioavailable form of solubilized keratin that can help you maintain full, lustrous hair and nails that are strong and flexible.* Cynatine® HNS can also help the skin to retain its youthful moisture and elasticity, as well as battle signs of aging associated with free radicals.* This product also has other critical nutrients necessary for the support and maintenance of the skin's healthy and youthful appearance.* Cynatine® is a registered trademark of Roxlor, LLC.; U.S. Patent 7,838,042 and patents pending, and the trademark TRAACS® are used under license from Albion Laboratories, Inc. Natural color variation may occur in this product.