Nioxin System 1 Cleanser Shampoo for natural hair with light thinning is the first step of a three part Nioxin regimen, specially formulated to strengthen the hair and amplify hair structure. This professional derma-purifying cleanser shampoo removes dirt, excessive oil and other environmental residues from the scalp and hair. Formulated with niacinamide and biotin, this clinically and dermatologically tested shampoo hydrates scalp and hair from root to tip while thickening and strengthening the hair structure. Follow with Nioxin System 1 Conditioner and Treatment for best results. Available in 2 sizes: 300ml and 1000ml. Use:1. Gently massage onto wet hair and scalp. 2. Lather for 1 minute. 3. Rinse thoroughly and follow with Scalp Therapy Revitalising Conditioner. Nioxin System 1 Shampoo for Thinning Hair 300 ml