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 contains vitamin B7 biotin, which helps strengthen hair to maintain growth, and collagen, a building block for healthy hair. The luscious blend in this thickening shampoo also contains hydrolyzed wheat proteins for hair that feels thicker and healthy-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 on your tresses. For best results, use this shampoo with the entire OGX Biotin & Collagen hair care collection to help infuse nutrients into every strand. Cruelty FreeA product has an independent third-party certification on pack or unqualified on-pack marketing claim relating to being cruelty-free and/or not tested on animals.