The Nioxin Scalp + Hair Thickening System 3 is designed for those experiencing light thinning, damage, or colored hair. This 3-step professional system includes a volumizing shampoo, conditioner, and treatment to plump hair strands and promote a fuller, thicker look. Enriched with biotin and niacinamide, the set protects hair from breakage and provides color protection. Clinically and dermatologically tested, 8 out of 10 users saw thicker, fuller hair in 30 days. The set contains a 150ml shampoo to cleanse and add lift, a 150ml conditioner to detangle and moisturize, and a 50ml leave-on treatment to nourish the scalp for optimal hair growth conditions.