NIOXIN Scalp + Hair Thickening Shampoo System 1 — 10.1 fl oz for Natural/Untreated Hair, Niacinamide & Biotin

Nioxin System 1 Scalp + Hair Thickening Cleanser is a salon-formulated shampoo designed to gently remove buildup and support fuller-looking natural hair with light thinning.

This professional-strength cleanser targets excess sebum, styling residue, minerals and environmental debris that can congest the scalp and make hair appear limp. Formulated for natural or untreated hair with light thinning, the System 1 shampoo combines botanical extracts, humectants and Nioxin's Density Protector technology to leave hair with improved body, smoother strands and a cleaner scalp environment.

How does this shampoo help hair look thicker on busy mornings?

The shampoo removes residues that weigh hair down and smooths individual strands so hair holds shape and volume more easily after styling. Consistent use helps hair feel fuller at the root, making quick morning styling more effective.

• Detoxifies scalp to lift hair at the root for instant-bodied styling.
• Density Protector technology smooths cuticles for easier comb-through and styling control.
• Leaves a lightweight finish—no heavy residues to flatten styles.

What results can I expect and how soon will I notice changes?

Many users report improved hair thickness and density appearance within weeks when used as directed with the matching conditioner and treatment. Results depend on individual hair type and consistency of use, but routine application supports reduced breakage and better-looking fullness over time.

• Visible thicker-looking hair with regular daily use.
• Helps reduce breakage by improving strand resilience.
• Supports scalp condition for healthier-looking growth over weeks.

Which ingredients are responsible for cleansing and scalp support?

The formula uses a concentrated blend of botanicals and humectants plus active ingredients like niacinamide and biotin to gently cleanse while maintaining essential oils. These components help clear nutrient pathways around follicles without stripping the scalp, creating a balanced base for scalp and hair treatments.

• Niacinamide supports scalp barrier function and overall scalp condition.
• Biotin contributes to improved strand strength and manageability.
• Botanical extracts and humectants lift buildup while preserving moisture.

How should I use this shampoo for best results?

Apply to wet hair, massage into the scalp and hair for about one minute, then rinse thoroughly. For optimal performance, follow with Nioxin System 1 Scalp Therapy Conditioner and the Scalp & Hair Treatment to complete the system.

• Use daily on natural, untreated hair with light thinning.
• Massage at the scalp for one minute to ensure thorough cleansing.
• Pair with System 1 conditioner and treatment for full benefits.

Who is this for: Nioxin System 1 shampoo is formulated for people with natural or untreated hair experiencing light thinning who want a salon-grade cleansing solution that supports scalp health and adds visible body. It’s suitable for daily use and works best when combined with the matching System 1 conditioner and topical treatment for a complete scalp and hair thickening routine.

Ingredients

Aqua, Sodium Laureth Sulfate, Sodium Lauryl Sulfate, Cocamidopropyl Betaine, Sodium Citrate, Sodium Xylenesulfonate, Sodium Chloride, Cocamide MEA, Sodium Benzoate, Citric Acid, Salicylic Acid, Mentha Piperita Oil, Mentha Arvensis Leaf Oil, Menthol, Tetrasodium EDTA, Sodium Hydroxide, Methylparaben, Propylene Glycol, Camellia Sinensis Leaf Extract, Cystine Bis-PG-Propyl Silanetriol, Biotin, Lecithin, Niacinamide, Panthenol, Tocopheryl Acetate, Citrus Paradisi Peel Extract, Humulus Lupulus Flower Extract, Urtica Dioica Leaf Extract, CI 42090, Faex Extract, Acer Saccharum Extract, Citrus Limon Peel Extract, Saccharum Officinarum Extract, Vaccinium Myrtillus Leaf Extract, Citrus Aurantium Dulcis Fruit Extract, Potassium Sorbate