Hair. Skin & Nails Collagen Plus Formula combines bioactive collagen peptides and several clinically-studied nutrients that work together to support overall healthy hair. skin and nails. Supporting skin growth and repair. healthy nail growth rate and healthy rejuvenation. this formulas clinically-validated nutrients promote youthful and lasting beauty. It supports healthy skin elasticity by encouraging healthy collagen formation. Cynatine HNS delivers essential vitamins and minerals to encourage keratin formation. Biotin promotes healthy protein and fatty acid metabolism. while silicon helps maintain healthy collagen.