OGX Thick & Full + Biotin & Collagen Volumizing Shampoo for Thin Hair, Thickening Shampoo with Vitamin B7 & Hydrolyzed Wheat Protein, Paraben-Free, Sulfate-Free Surfactants, 13 fl oz

Give thin, flat hair a beautiful boost with the hair thickening power of this nutrient-rich volumizing shampoo Infused with vitamin B7, biotin & collagen, it leaves hair looking fuller & healthier.