Plump up the volume in thin hair with the OGX Thick & Full + Biotin & Collagen Hair Volumizing Shampoo. Ideal for flat to medium-volume hair, this thickening shampoo leaves hair feeling fuller and helps create more abundant-looking locks. The nutrient-rich, plump-it-up formula, is infused with vitamin B7 biotin, collagen, and wheat protein, and helps maintain growth for hair that’s healthy-looking and feels thicker. The luscious blend in this thickening shampoo also contains hydrolyzed wheat proteins for hair that feels thicker and healthier-looking. Plus, the bergamot, jasmine, and vanilla scent makes lathering up an all-around sensory experience that leaves locks with an irresistibly good smell. Paraben-free with sulfate-free surfactants, this thick hair shampoo helps turn up the volume of your tresses. For best results, use this shampoo with the entire OGX Biotin & Collagen hair care collection to help infuse nutrients into every strand.