HOW TO USE: apply shampoo generously to wet hair, massage into a lather through to ends, then rinse the hair thoroughly after shampooing, follow with a volumizing conditioner to keep your locks looking thick, full, shiny, smooth, and healthier than ever. FULL AND SHINY: after just one use, strands feel thicker and look fuller this shampoo helps to thicken and texturize any hair type immerse your skinny strands in this super volumizing formula to create fuller looking, shiny hair beauty, pure and simple. PLUMP IT UP: the nutrient-rich, plump-it-up power of this haircare infused with ProVitamin B7 biotin and collagen helps give each strand of hair a beautiful boost, this dynamic duo will leave your hair feeling thicker, fuller, and looking oh, so healthy. HAIR CARE INSPIRED BY NATURE: The nutrient-rich, plump-it-up formula contains vitamin B7 biotin, which helps strengthen hair to maintain growth, collagen, a building block for healthy hair, and hydrolyzed wheat proteins. THICKER, FULLER, HEALTHIER: Ideal for flat to medium volume hair, this volumizing shampoo leaves hair feeling thicker and healthy-looking as it cleanses. PLUMP UP THE VOLUME: The 13-fluid ounce bottle of OGX Thick Full Biotin Collagen Shampoo gives thin strands a thickening boost, volumizing them into fuller and more abundant-looking locks.