OGX Thick & Full + Biotin Collagen Extra Strength Volumizing Shampoo with Vitamin B7 Hydrolyzed Wheat Protein for Fine Hair. Sulfate-Free Surfactants Thicker, Fuller Hair, 13 Fl OzEXTRA STRENGTH FOR EXTRA VOLUME OGX Extra Strength Biotin & Collagen Shampoo is a volume creating powerhouse with an extra helping of vitamins and proteins to pump up fine strands LIGHTWEIGHT CLEANSING Extra body doesn't mean extra weight with this thickening shampoo. It's an astonishingly lightweight blend that delivers deep clean, bold body, and incredible volume BIOTIN FOR THE WIN: Biotin, aka vitamin B7, is crucial for skin, nail, and hair health.