Nioxin Scalp + Hair Thickening Conditioner System 1 — 10.1 fl oz, lightweight daily formula with niacinamide & biotin

Nioxin System 1 Scalp + Hair Thickening Conditioner is a lightweight, salon-grade conditioner designed to strengthen natural hair with light thinning while supporting a healthier scalp environment.

This conditioner is the second step in Nioxin’s three-part System 1 regimen and pairs with the System 1 Cleanser Shampoo and Scalp & Hair Treatment. Formulated with BioAMP technology plus niacinamide and biotin, it helps fortify hair strands, maintain moisture balance, and preserve hair structure without weighing fine hair down. The texture rinses clean and is intended for daily use to complement scalp-focused cleansing and topical treatments.

How does this conditioner support finer, natural hair?

The System 1 conditioner reinforces hair resilience by smoothing and strengthening individual strands to reduce breakage and help hair appear fuller. Its lightweight formula avoids buildup so fine hair keeps natural movement and volume.

• BioAMP technology to fortify and amplify hair structure
• Niacinamide encourages a balanced scalp environment
• Biotin helps strengthen hair fiber integrity
• Non-greasy moisturizing agents that rinse clean

When and how should I use it in my routine?

Use this conditioner after cleansing with the matching System 1 shampoo. Apply to the scalp and through hair, leave on for 1–3 minutes, then rinse thoroughly—daily use is recommended for best outcomes.

• Step 2 of a three-step System 1 program
• Apply after shampooing for optimal distribution
• Suitable for everyday use to maintain scalp and hair balance
• Works best paired with System 1 Cleanser and treatment

What ingredients are highlighted and what do they do?

The formula combines targeted actives and lightweight moisturizers to protect and hydrate without heaviness. Key components like niacinamide and biotin are included to support scalp condition and hair strength, while antioxidants and botanicals help nourish the scalp surface.

• Niacinamide: helps maintain a healthy scalp surface
• Biotin: supports hair fiber strength and resilience
• Botanical extracts and antioxidants to nourish the scalp
• Lightweight emollients that retain moisture without weighing hair down

What visible benefits can I expect and when?

Users often report improved texture and a fuller-looking appearance when the full System 1 regimen is used consistently. While individual results vary, many notice differences in hair feel and manageability within weeks when used together with the System 1 shampoo and treatment.

• Improves hair manageability and resilience
• Helps reduce breakage that can make hair look thinner
• Supports the appearance of increased fullness and density over time
• Designed for fine, natural hair with light thinning

Who is this for: This product is formulated for people with natural, untreated hair experiencing light thinning who want a lightweight conditioner that strengthens strands while supporting scalp health. It’s aimed at those seeking a salon-quality, daily-use conditioner that works as part of a targeted scalp and hair density program rather than a one-off cosmetic fix.

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