Nioxin System 4 Thickening Shampoo
- 16.9 fl oz
- Colored, damaged hair with progressed thinning
- 85% noticed thickening; 80% density, 80% fullness
- Visible results in 30 days, per listing
- Salicylic acid, peppermint scent
- Step 1 of a three part regimen
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A scalp-cleansing thickening shampoo for colored hair with progressed thinning. Its fullest claims rely on using the matching conditioner and treatment too.
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ASIN: B001I7UWFCCategory: Hair Shampoos
Overview
People with colored, thinning hair get a scalp-focused cleanser from NIOXIN that clears sebum and residue from the follicles. Used daily, it leaves hair looking thicker and fuller while protecting color.
A cleaner scalp and fuller-looking hair is the reason to start this NIOXIN routine. It is gentle on color and works daily. The bullets describe the whole kit, so the biggest results assume the conditioner and treatment as well.
Who it's for
Colored or chemically treated hair showing progressed thinning is the target. Those with untreated hair or early thinning should look at the other NIOXIN systems.
Pros and cons
- Clears sebum and residue from scalp
- Protects hair color
- Bullets describe the whole kit
- Full results need all three steps
Performance notes
Fullness comes partly from a clean scalp and partly from a lighter, swollen hair shaft after washing. Removing sebum and residue lets hair lift at the roots. Lathering for a minute gives the cleanser time to work.
Specifications
| Brand | Nioxin |
|---|---|
| Dimensions & fit | |
| Item Dimensions | 2.72 x 2.05 x 9.84 inches |
| Item Weight | 1.2 pounds |
| Capacity & performance | |
| Liquid Volume | 16.9 fluid ounces |
| Age Range Description | Adult |
| Construction & materials | |
| Suitable Hair Color | All hair colors |
| Other details | |
| Hair Type | Thin, colored and damaged, progressed thinning |
| Active Ingredients | Salicylic acid |
| Scent Name | Peppermint |
| Suggested Use | Apply to wet hair, massage, lather 1 minute, rinse, daily |
| Regimen | Step 1 of a three part system |
| Item Form | Liquid |
| Other Special Features Of The Product | Cleansed scalp and thicker, fuller-looking hair |
| Recommended Uses For Product | Professional Salon & Spa |
Frequently asked questions
How do I use NIOXIN System 4 shampoo?
Apply to wet hair, gently massage into the scalp and hair, lather for 1 minute and rinse thoroughly. Use daily.
Does NIOXIN System 4 regrow hair?
The listing claims a thicker, fuller look, with 85% noticing a thickening effect. It does not claim regrowth.
What else do I need with NIOXIN System 4 shampoo?
The description says to use it with System 4 Scalp Therapy Conditioner and the Scalp and Hair Treatment.