Scalp + Hair Thickening System 2 Leave on Treatment - Nioxin Pro Clinical's System Kit 2 is designed for natural, untreated hair with progressed thinning. Clinically and dermatologically tested, the hair thickening treatment nourishes and strengthens each strand of hair from root to tip, resulting in thicker, fuller hair.BenefitsThickens the hair: Nioxin System Kit 2 is clinically designed to add thickness and fullness to natural hair with progressed thinning, with visible results in just 30 days.Nourishes the scalp: Infused with nourishing botanicals, antioxidants, and UV protecting ingredients, this kit's Scalp + Hair Thickening Treatment can nourish and revitalize the scalp, improving its overall health and condition.Research Results85% of consumers noticed a thickening effect, 80% noticed an increase in hair density, 80% noticed an increase in hair fullness*Disclaimers*Based on a survey among 230 U.S. panelists concerned about thinning hair who tried the systems (each tested 1 system kit), conducted by SIRS, 2016 - Scalp + Hair Thickening System 2 Leave on Treatment