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What is Amazon Professional Beauty? Amazon has curated a selection of high-quality products that can be found in professional settings such as salons, spas, and dermatology offices. To buy Professional items, just look for the Professional Beauty badge. Professional Beauty Disclaimer: Content on this site is for reference purposes only and is not a substitute for advice from a licensed health-care professional. You should not rely solely on this content, and Amazon assumes no liability for inaccuracies. Always read labels and instructions before using a product. Protect and refresh the scalp with Nioxin’s 3-part System 4 Scalp & Hair Treatment for Colored Hair with Progressed Thinning. This diameter-increasing leave-in hair and scalp treatment is particularly formulated for colored hair with progressed thinning. Nioxin’s treatment Scalp Access Delivery System 2.0 technology helps prevent hair loss due to breakage, providing a refreshed scalp environment. Nioxin’s Scalp and Hair Treatment is the final step of a 3-part System, designed to strengthen the hair and amplify hair structure. Nioxin is the only salon brand with 25+ years of experience in thinning hair. Nioxin, supported by The Institute of Trichologists, believes the scalp is an extension of facial skin and requires the same attention and care.







