System 1 Treatment is designed for natural, untreated hair with light thinning. Clinically and dermatologically tested, this nourishing and protective leave-on treatment strengthens each strand from within, resulting in thicker, fuller hair. Nioxin Leave-In Treatment enhances the thickness and fullness of your natural hair. The lightweight formula adds body to your hair, making it look thicker and fuller.

Formulated with a powerful blend of niacinamide, wild mint oil, and caffeine to help nourish the hair root, stimulate hair follicles, and strengthen the hair.

THICKENS THE HAIR: clinically designed to add thickness and fullness to natural hair with light thinning, with visible results in just 30 days.

SUPPORTS SCALP HEALTH: advanced formula gently cleanses the scalp, removing impurities and excess sebum that can clog hair follicles.

REDUCES HAIR THINNING: helps minimize hair breakage, promoting the appearance of fuller, thicker hair.

NOURISHES THE SCALP: Infused with antioxidants and UV protecting ingredients, this Treatment can nourish and revitalize the scalp, improving its overall health and condition.