Serum for scalp and hair with advanced thinning. With niacinamide and biotin, it thickens hair fibers, reduces hair loss, and strengthens against damage and breakage. Dermatologically tested. The Nioxin System 4 Leave-In Scalp & Hair Treatment for Color-Treated Hair with Advanced Thinning refreshes the scalp and increases hair volume. This volumizing treatment foam helps increase the density of each hair fiber, giving hair a fuller appearance. Nioxin Scalp & Hair Treatment is the final step in the 3-part system, specifically formulated to amplify hair texture while protecting against breakage.
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