NIOXIN Scalp + Hair Thickening Conditioner System 2 — 16.9 fl oz, Niacinamide & Biotin for Natural/Untreated Hair

Nioxin System 2 Scalp + Hair Thickening Conditioner is a lightweight, professional conditioner formulated to strengthen natural or untreated hair with progressed thinning while improving moisture balance and leaving hair looking fuller.

This conditioner is the second step in Nioxin’s System 2 regimen designed for natural hair with progressed thinning. Its formula combines BioAMP technology with active ingredients such as niacinamide and biotin to help reinforce hair structure, reduce breakage, and maintain a balanced scalp environment. The 16.9 fl oz size provides a salon-strength conditioner you can use every day after cleansing with the matching System 2 cleanser.

How does this conditioner support a healthier scalp and hair appearance?

The conditioner targets scalp and strand resilience by delivering lightweight hydration and strengthening components without weighing hair down. It supports a cleaner scalp environment when used as part of the three-step System 2 routine, helping the hair look thicker and fuller over time.

• BioAMP technology to increase hair structure and resilience
• Niacinamide to support scalp comfort and surface conditioning
• Biotin to reinforce hair fibers and reduce visible breakage
• Lightweight moisturizing agents to retain moisture balance

What results can I expect and how quickly might I see them?

While individual results vary, users report improved fullness and density with consistent use alongside the System 2 shampoo and treatment. Clinical-style consumer feedback highlights visible improvements in hair thickness and overall fullness within weeks of daily use.

• Users noted thicker-looking hair and increased density over time
• Helps minimize breakage so hair appears fuller
• Best visible improvements when used daily in the full System 2 routine

How do I use the System 2 conditioner for best effect?

Apply after cleansing with the System 2 Cleanser Shampoo. Distribute the conditioner across the scalp and through the lengths, leave on for 1–3 minutes, then rinse thoroughly. For optimal results, follow with the Nioxin Scalp & Hair Treatment.

• Step 1: Use System 2 Cleanser Shampoo to remove buildup
• Step 2: Apply this conditioner from roots to ends and leave 1–3 minutes
• Step 3: Rinse and finish with the System 2 Scalp & Hair Treatment

Is this safe for my natural or untreated hair color and texture?

The formula is formulated for natural or untreated hair and is lightweight enough to preserve texture and manageability. It is designed to avoid heavy residue, making it suitable for a range of curls, coils, and straighter textures seeking improved fullness.

• Specifically for natural or untreated hair with progressed thinning
• Non-greasy finish maintains hair movement and style
• Works across textures without weighing hair down

Who is this for: Nioxin System 2 Scalp + Hair Thickening Conditioner is aimed at people with natural or untreated hair experiencing progressed thinning who want a professional-strength, everyday conditioner. Ideal for anyone seeking a lightweight formula that supports scalp health, strengthens strands with niacinamide and biotin, and integrates into a three-step routine to help hair look fuller and more resilient.

Ingredients

Aqua, Cetyl Alcohol, Stearamidopropyl Dimethylamine, Stearyl Alcohol, Quaternium-18, Phenoxyethanol, Benzyl Alcohol, Cetearyl Alcohol, Hydroxypropyl Guar, Glyceryl Stearate, Hydroxyethylcellulose, Oleyl Alcohol, Methylparaben, Propylparaben, Polysorbate 60,Mentha Piperita Oil, Mentha Arvensis Leaf Oil, Menthol, Bis-Aminopropyl Dimethicone, EDTA, Propylene Glycol, Citric Acid, 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, Faex Extract, Acer Saccharum Extract, Citrus Limon Peel Extract, Saccharum Officinarum Extract, Vaccinium Myrtillus Leaf Extract, Citrus Aurantium Dulcis Fruit Extract, CI 42090, Potassium Sorbate, Sodium Benzoate