Concerning this item Including Tri-level Thickening Complex to Strengthen, Volumize, and Fortify Hair with Biotin, Collagen, and Coffee Using biotin to make hair appear thicker, collagen to strengthen locks, and coffee to help strengthen strands, this shampoo helps to deliver volume. Convert thin, flat strands of hair into amazingly fuller locks. Use HASK Biotin Boost Thickening Shampoo to give fine, flat strands of hair volume and fullness. infused with coffee, collagen, and biotin to help encourage hair that appears thicker and stronger. Make a big splash or head home! Description of the Product Fine, flat strands can be transformed into amazingly fuller hair. With the help of biotin to make hair appear thicker, collagen to strengthen locks, and coffee to help strengthen strands, this shampoo helps to deliver volume. functions on three levels to help deliver biotin that adds volume and makes hair appear thicker.