Nioxin System 4 Scalp + Hair Conditioner for Colored, Damaged Hair — 10 fl oz, Lightweight Density-Boosting with Niacinamide & Bio

Nioxin System 4 Scalp + Hair Conditioner is a lightweight, density-protecting conditioner formulated to moisturize colored, damaged hair while helping hair appear thicker and fuller.

This conditioner is the second step in Nioxin's three-step Scalp Therapy regimen, created for color-treated hair experiencing progressed thinning. Its formula combines BioAmp technology with niacinamide and biotin to help maintain moisture balance, strengthen fragile strands, and improve manageability without weighing hair down. Designed for daily use after cleansing, it supports scalp health and helps amplify hair structure for a fuller-looking finish.

How does this conditioner improve the look and feel of thinning, color-treated hair?

The formula targets weakened hair by restoring moisture balance and reinforcing strand resilience. Lightweight conditioning agents smooth the cuticle and reduce the appearance of breakage, while active ingredients support a healthier scalp environment that can make hair look denser.

• Contains BioAmp technology to maintain moisture and resilience.
• Niacinamide and biotin help support hair strength and manageability.
• Specifically tuned for color-treated, damaged hair to preserve color and texture.

When and how should I use Nioxin System 4 Conditioner for best results?

Use it as the second step immediately after shampooing with the matching System 4 Cleanser. Apply to the scalp and work through the lengths, leave on for one to three minutes, then rinse thoroughly; daily use is recommended for continuous benefit.

• Apply after shampooing; leave 1–3 minutes before rinsing.
• Use daily as part of the System 4 three-step regimen for consistent results.
• Pair with System 4 Cleanser and Scalp & Hair Treatment for full effect.

What results can I expect and how quickly might they appear?

Many users notice improved thickness, fullness, and reduced breakage over time when used consistently with the System 4 kit. While individual outcomes vary, visible improvements in hair texture and density can emerge within weeks of regular use.

• Helps hair look thicker and fuller with continued use.
• Supports reduction of hair breakage by strengthening strands.
• Promotes a healthier scalp environment that supports overall hair appearance.

Is this conditioner safe for color-treated hair and sensitive scalps?

Yes—the formula is designed specifically for colored hair with progressed thinning and aims to protect both color and scalp. Its lightweight consistency avoids heavy buildup while delivering moisture and scalp-supporting ingredients suitable for regular application.

• Formulated to maintain color vibrancy while conditioning hair.
• Lightweight texture minimizes residue and buildup on the scalp.
• Designed to be used daily as part of a targeted scalp-care routine.

Who is this for: Nioxin System 4 Scalp + Hair Conditioner is intended for people with color-treated, damaged hair experiencing progressed thinning who want a salon-grade conditioner that moisturizes without weight, supports scalp health, and helps hair appear fuller. It's ideal for daily use within a three-step Nioxin regimen, for those seeking to strengthen fragile strands while preserving hair color and manageability.

Ingredients

Aqua, Cetyl Alcohol, Stearamidopropyl Dimethylamine, Stearyl Alcohol, Quaternium-18, Phenoxyethanol, Benzyl Alcohol, Cetearyl Alcohol, Hydroxypropyl Guar, Bis-Aminopropyl Dimethicone, Glyceryl Stearate, Oleyl Alcohol, Methylparaben, Propylparaben, Polysorbate 60, Mentha Piperita Oil, Mentha Arvensis Leaf Oil, Menthol, EDTA, Hydroxyethylcellulose, Citric Acid, Propylene Glycol, Camellia Sinensis Leaf Extract, Cystine Bis-PG-Propyl Silanetriol, Biotin, Lecithin, Niacinamide, Panthenol, Tocopheryl Acetate, Foeniculum Vulgare Fruit 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