This Nioxin Scalp + Hair System 4 Hair Thickening Treatment is specifically formulated for damaged, visibly thinning hair. It utilizes a high-performance Niacinamide Serum combined with beneficial ingredients like Biotin and Caffeine. This intensive treatment works to promote thicker-looking hair by refreshing the scalp environment and fortifying the hair strands against breakage. Regular use helps to revitalize the appearance of thinning hair, providing noticeable density and strength where it's needed most.