Ideal for those with thinning crowns and receding hairlines, Nioxin’s Hair Booster Serum promotes optimal conditions for healthy-looking hair growth. The hydrating leave-in treatment restores noticeable strength to weak, thinning hair, while simultaneously protecting against damage. Powered by years of research and development for visible results, the advanced formula is blended with wild mint, panthenol and peppermint oil to encourage a fuller appearance.