Bosley, the most recognized hair restoration brand in the world, has created professional strength for thicker hair. Bos-defense haircare volumizes and thickens normal to fine hair Sulfate-free nourishing shampoo removes toxins such as d.h.t. (a primary cause of thinning hair and hair loss) The lifextend complex contains sage extract and pentapeptides to help stimulate production of root-strenghtening keratin protein