NIOXIN Scalp & Hair Thickening Conditioner System 1 — 33.8 fl oz, Lightweight Hydration with Niacinamide & Biotin

Nioxin System 1 Scalp Therapy Conditioner is a lightweight, salon-grade formula that helps strengthen and moisturize natural hair with light thinning while supporting a healthier scalp environment.

Designed as the second step in Nioxin's three-part regimen, this 33.8 fl oz conditioner targets natural or untreated hair showing early signs of thinning. It combines BioAMP technology with key actives like niacinamide and biotin to help fortify hair fibers, preserve moisture balance, and improve manageability without weighing hair down. Use after cleansing with the System 1 Cleanser Shampoo and follow with the Scalp and Hair Treatment for a complete density-protecting routine.

How does this conditioner help thin-looking hair feel fuller?

The formula strengthens individual strands to reduce breakage and amplify the hair’s appearance of thickness. Instead of coating hair with heavy oils, it uses lightweight conditioning agents and BioAMP technology to support hair structure.

• Lightweight hydration that won’t flatten fine hair
• BioAMP technology helps amplify strand diameter and resilience
• Niacinamide and biotin support visible fullness and manageability
• Developed to work with System 1 shampoo and treatment for cumulative benefits

What results can I expect, and how quickly?

Individual results vary, but many users notice improvements in texture and fullness within weeks when the full system is used regularly. The product is formulated for daily use and is optimized to promote a healthier scalp environment that supports the appearance of denser hair over time.

• Reported visible improvements in thickness and fullness with consistent use
• Helps reduce breakage that contributes to thinner-looking hair
• Visible effects are typically observed with the complete System 1 routine

How do I use the conditioner for best results?

Apply after shampooing while hair is wet to evenly distribute across scalp and lengths. Leave on for 1–3 minutes, then rinse thoroughly; use daily as part of the System 1 trio for optimal density-protecting benefits.

• Step 1: Cleanse with Nioxin System 1 Cleanser Shampoo
• Step 2: Distribute conditioner onto scalp and through hair, leave 1–3 minutes
• Step 3: Rinse well and follow with Scalp and Hair Treatment
• Recommended daily use for cumulative improvements

Is this product suitable for my hair type and scalp concerns?

This conditioner is formulated specifically for natural or untreated hair experiencing light thinning. It’s lightweight enough for fine textures and focuses on scalp health, making it a fit for those looking to strengthen strands and improve overall hair density appearance without heavy moisturizing agents.

• Ideal for fine, natural hair with light thinning
• Not formulated for chemically treated or color-compromised hair—choose a system matched to your hair’s treatment level
• Designed to support scalp health as part of a system-based approach

Who is this for: Nioxin System 1 Scalp Therapy Conditioner is best for people with natural, untreated hair who notice early or light thinning and want a salon-grade, daily conditioner that supports strand strength and scalp health. If you seek a lightweight conditioner that enhances fullness and works as part of a targeted regimen, this product offers a practical and professional option.

Ingredients

Aqua, Cetyl Alcohol, Stearamidopropyl Dimethylamine, Quaternium-18, Stearyl Alcohol, Bis-Aminopropyl Dimethicone, Hydroxyethylcellulose, Phenoxyethanol, Benzyl Alcohol, Cetearyl Alcohol, Mentha Piperita Oil, Mentha Arvensis Leaf Oil, Menthol, Glyceryl Stearate, Oleyl Alcohol, Methylparaben, PEG-2M, Propylparaben, Polysorbate 60, EDTA, Propylene Glycol, Citric Acid, Limonene, Camellia Sinensis Leaf Extract, Silica, 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, BHT, 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