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

Nioxin System 2 Scalp + Hair Thickening Conditioner is a lightweight, moisture-balancing conditioner formulated to strengthen natural or untreated hair with progressed thinning and help it appear fuller.

This conditioner is the second step in Nioxin’s three-part regimen designed specifically for natural hair showing progressed thinning. Its formula blends strengthening actives like biotin and niacinamide with the brand’s professional BioAMP technology to improve hair resilience and maintain a balanced scalp environment. Use it after cleansing to detangle, nourish, and support hair structure without weighing strands down.

How will this conditioner improve the look and feel of thinning hair?

The conditioner focuses on reinforcing hair fibers and replenishing moisture so strands feel stronger and look denser. It’s lightweight, so it adds body rather than flattening fine hair, and helps reduce the appearance of breakage by improving elasticity. Results are most noticeable when used consistently as part of the System 2 routine.

• Strengthens individual strands with biotin-enriched support
• Boosts hair body and fullness without heavy residue
• Helps lessen visible breakage and split ends
• Formulated for natural or untreated hair textures

What ingredients power the conditioning and scalp benefits?

Key actives include niacinamide and biotin, combined with Nioxin’s BioAMP technology to fortify hair structure and support a healthier scalp environment. The formula also contains moisturizers and botanicals to soothe and protect. These components work together to maintain balanced hydration and resist daily stressors that can make fine hair look limp.

• Niacinamide: supports scalp health and circulation
• Biotin: helps strengthen and fortify hair fibers
• Botanical extracts and antioxidants: nourish and protect
• BioAMP technology: amplifies hair structure for fuller appearance

How do I use Nioxin System 2 Conditioner for best results?

Apply after the System 2 cleanser while hair is wet: distribute the conditioner across the scalp and through the lengths, leave on for 1–3 minutes, then rinse thoroughly. Daily use is recommended as part of the three-step System 2 routine, pairing it with the matching cleanser and leave-in scalp treatment. Regular use helps preserve moisture balance and improves manageability over time.

• Use daily after the System 2 Cleanser Shampoo
• Leave on 1–3 minutes for optimal absorption
• Rinse well to avoid buildup and maintain lightness
• Follow with the Scalp & Hair Treatment for added benefits

What results can I reasonably expect and when?

While individual results vary, many users report visible improvements in fullness and reduced breakage with consistent use. Surveys and trials have shown users noting thicker-looking hair and improved density when the full system is used as directed. For best outcomes, allow several weeks of regular application to evaluate changes in texture and appearance.

• Noticeably fuller-looking hair with ongoing use
• Improved strand resilience and fewer breakage signs
• Enhanced scalp condition that supports hair appearance
• Visible differences typically appear within weeks for many users

Who is this for: Nioxin System 2 Scalp + Hair Thickening Conditioner is created for people with natural or untreated hair experiencing progressed thinning who want a lightweight conditioner that strengthens strands and supports scalp health. It’s suited to users seeking salon-grade, science-informed care to improve hair body and manageability without heavy silicones or oils that can weigh hair down. Use it as part of the complete Nioxin System 2 routine for the most consistent results.

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