Photo 1 of Nioxin System 4 Scalp Care + Hair Thickening Leave-In Treatment for Colored, Dry & Damaged Hair with Progressed Thinning | Maintain Vibrant Color | Nourish & Boost Density with Niacinamide & Biotin

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Photo 1 of Nioxin System 4 Scalp Care + Hair Thickening Leave-In Treatment for Colored, Dry & Damaged Hair with Progressed Thinning | Maintain Vibrant Color | Nourish & Boost Density with Niacinamide & BiotinPhoto 2 of Nioxin System 4 Scalp Care + Hair Thickening Leave-In Treatment for Colored, Dry & Damaged Hair with Progressed Thinning | Maintain Vibrant Color | Nourish & Boost Density with Niacinamide & Biotin