Nioxin System 1 Shampoo 1000mlDescription How to Use Ingredients System Kit 1 Shampoo is designed for natural, untreated hair with light thinning. Why you'll love it: Clinically and dermatologically tested, the shampoo nourishes and gently cleanses your hair to prevent against follicle clogging sebum, resulting in thicker, fuller hair. Benefits: THICKENS THE HAIR: clinically designed to add thickness and fullness to natural hair with light thinning, with visible results in just 30