Thicken and add texture to your hair with this OGX Thick & Full Biotin & Collagen Shampoo. It's formulated with vitamin B7, also known as biotin, which infuses nutrients into every strand. This collagen hair shampoo comes in a 19.5 oz size. It's enriched with wheat protein to create the appearance of thicker, fuller and healthier looking hair. It is specially designed to help add volume to even the thinnest hair. It is made without animal testing and is part of the Sulfate Free Surfactants Hair Care System. Suitable for everyday use, OGX Biotin & Collagen Shampoo can be used alone or as part of a hair care system with OGX Thick & Full Biotin & Collagen Conditioner, which is sold separately, for optimum results. OGX Thick & Full Biotin & Collagen Shampoo, 19.5 Oz