Nioxin System Kit 4 is clinically designed to add thickness and fullness to dry, damaged, color-treated hair with progressed thinning, with visible results in just 30 days. The advanced formula gently cleanses the scalp, removing impurities and excess sebum that can clog hair follicles, creating a healthier environment. By strengthening hair resilience, it helps minimise hair breakage, promoting the appearance of fuller, thicker hair while protecting the hair color. Infused with nourishing botanicals, antioxidants, and UV protecting ingredients, this kit's Scalp + Hair Thickening Treatment can nourish and revitalise the scalp, improving its overall health and condition. This kit promotes a thicker appearance. The colour-safe collection is enriched with a blend of niacinamide and biotin to encourage stronger, full-looking results. Set Contents: System 4 Shampoo for Coloured, Dry and Damaged Hair with Progressed Thinning 300ml Sweeping away impurities and build-up, the shampoo cleanses the scalp to minimise the risk of clogged hair follicles. The formula is infused with niacinamide and biotin to promote visibly stronger, fuller-looking hair. System 4 Conditioner for Coloured, Dry and Damaged Hair with Progressed Thinning 300ml The creamy formula envelops strands in a rich texture to nourish and support the hair’s natural strength. An invigorating blend of actives helps to encourage a thicker appearance for lengths prone to breakage. System 4 Leave on Treatment 100ml Developed to plump the appearance of strands, the leave-in hair treatment helps to create a naturally volumised illusion. The no-rinse formula boosts the look of fullness while reducing the risk of hair fall. This 3-step professional system includes a shampoo, conditioner, and leave-on treatment, clinically designed to target progressed thinning for colour-treated or dry, damaged hair. Clinically and dermatologically tested, this complete scalp & hair thickening system thickens and strengthens your hair against breakage while providing colour protection. 8 out of 10 users saw thicker, fuller hair in 30 days!