Plump up the volume in thin hair with the OGX Thick & Full + Biotin & Collagen Hair Volumizing Shampoo and Conditioner. 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 hydrolysed 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.