OGX Thick & Full Biotin & Collagen Shampoo, is a high performance blend of powerful ProVitamin B7 Biotin which infuses nutrients into every strand, while plumping collagen adds volume and dimension, and hydrolyzed wheat proteins strengthen, for thicker, fuller, healthier looking hair. Turn up the volume with this nutrient rich thickening formula. A fine hair must-have, this powerful blend of Vitamin B7, Biotin, Collagen and Hydrolyzed Wheat Protein, helps plumpen even the skinniest strands to add body and shine.