Fine, thin hair instantly gains major mass, guts & volume from Color Wow Carb Cocktail Bionic Tonic, a ground-breaking leave-in “bionic tonic” supplement. Chemicals in hair colour cause three major problems, & one of them is loss of proteins that give hair strands natural thickness & body. If you want to bulk up skinny strands, simply apply Carb Cocktail after you shampoo & condition, then heat style.