Nioxin System 2 Thickening Conditioner for Natural or Untreated Hair — 10.1 fl oz, Biotin & Niacinamide for Fuller-Looking Hair

Nioxin System 2 Scalp + Hair Thickening Conditioner is a lightweight, salon-grade conditioner formulated to strengthen and hydrate natural or untreated hair with progressed thinning while creating a fuller-looking appearance.

Built as the second step in Nioxin’s three-part regimen, this 10.1 fl oz conditioner targets the scalp and hair fiber with a blend of strengthening agents such as biotin and niacinamide plus Nioxin’s BioAMP technology. It’s made to help retain moisture balance without weighing hair down, leaving strands more resilient and visually thicker when used with the matching System 2 Cleanser and Scalp & Hair Treatment.

How does this conditioner help hair that’s thinning?

The formula focuses on improving hair structure and scalp condition to support fuller-looking hair. It reinforces strands to reduce breakage and helps maintain moisture so hair appears denser and more manageable.

• BioAMP technology strengthens the hair fiber and amplifies hair texture.
• Biotin and niacinamide support hair resilience and a healthier scalp environment.
• Lightweight hydration avoids heaviness that can flatten fine or thinning hair.

When and how should I use this as part of my routine?

Use after cleansing with Nioxin System 2 Cleanser Shampoo as the second step in the three-part system. Apply to the scalp and lengths, leave on for 1–3 minutes, then rinse thoroughly; daily use provides the best visible results.

• Step 2 in the System 2 regimen—use daily after shampooing.
• Distribute from roots to tips, focusing on the scalp and weakened areas.
• Pair with System 2 Cleanser and Scalp & Hair Treatment for optimal performance.

What results can I expect and how quickly?

Visible improvements are typically reported within weeks when the full System 2 regimen is followed consistently. The conditioner helps hair look fuller and feel stronger while assisting in moisture balance to reduce breakage over time.

• Users report fuller-looking hair and increased density with continued use.
• Helps reduce visible thinning by improving strand resilience and texture.
• Formulated to complement treatments that target scalp health for better long-term appearance.

Is this safe for colored or chemically treated hair?

This version of System 2 is designed for natural or untreated hair with progressed thinning; consult product labeling or a stylist if you have color-treated or chemically altered hair. For treated hair, Nioxin offers other systems tailored to specific hair conditions.

• Formulated primarily for natural, untreated hair types with thinning concerns.
• Check compatibility if your hair is colored, permed, or heavily chemical-treated.
• Salon professionals can recommend the best Nioxin system for treated hair.

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 lightweight, strengthening conditioner that supports scalp health and fuller-looking hair. It’s suitable for daily use as part of a three-step Nioxin routine and works best when paired with the System 2 Cleanser Shampoo and Scalp & Hair Treatment.

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