It Is An Exclusive Blend Of Vitamin B7 Biotin, Collagen And Hydrolyzed Wheat Protein That Helps Thicken And Smooth Any Type Of Hair With Just One Application. A Powerful Sulfate-Free Formula, Ogx Thick & Full + Biotin & Collagen Shampoo Helps Thicken Even The Smallest Strands To Give Hair A Thicker, Fuller, Healthier Look.