Normal to fine. Non color-treated hair. Bosley doctor recommended. Bosley, the world's most experienced hair restoration expert, has created Professional Strength for thicker fuller-looking hair. Bos-Defense haircare volumizes & thickens normal to fine hair. Paraben-free Volumizing Conditioner infuses weightless body & incredible shine. LifeXtend complex contains sage extract & pentapeptides to help promote thicker fuller-looking hair. Rice amino acids help thicken & volumize. Vegetable protein helps fortify hair shafts. Kelp extract helps protect from photo-aging, frequent washing & damage due to brushing.