NIOXIN System 2 Thickening Shampoo
- 10.1 fl oz shampoo bottle
- System 2, for natural hair with progressed thinning
- Niacinamide and biotin named in the listing
- Salicylic acid is the listed active
- Peppermint scent, all hair colors
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A thickening scalp-care shampoo for natural hair with progressed thinning, built on salicylic acid. It is one step of a system, so results depend on pairing and sustained use.
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ASIN: B005EUATLQCategory: Hair Shampoos
Overview
Cleansing the scalp is where this Nioxin shampoo starts, using a blend described as nourishing the root and strengthening hair. The listing frames it for natural, untreated hair with progressed thinning and adds niacinamide and biotin to boost density.
A shampoo built around scalp health suits people seeing thinning on hair that has not been colored or chemically treated. Salicylic acid handles buildup at the scalp. The listing says little about how often to use it, and shampoo alone does not claim to match a full multi-step system.
Who it's for
Adults with thin, natural hair who want a scalp-focused cleanser in a professional-line format. Those with colored or damaged hair, or who dislike peppermint, should look at a different system number or a gentler formula.
Pros and cons
- Salicylic acid as listed active
- Suits all hair colors
- Gluten free per listing
- Made for natural hair only
- Usage directions not listed
Performance notes
Salicylic acid loosens scalp buildup so the follicle area is cleaner, which is the mechanism behind the scalp care claim. The listing says the blend nourishes the hair root and strengthens the hair, and pairs best with the other system steps. A thicker look comes gradually, not after one wash.
Specifications
| Brand | Nioxin |
|---|---|
| Dimensions & fit | |
| Item dimensions | 2.36 x 1.77 x 8.62 inches |
| Item weight | 10.08 ounces |
| Capacity & performance | |
| Liquid Volume | 10.1 fluid ounces |
| Age Range Description | Adult |
| Construction & materials | |
| Material Type Free | Gluten Free |
| Suitable Hair Color | All Hair Colors |
| Other details | |
| Hair Type | Thin |
| Active Ingredients | Salicylic Acid |
| Item Form | Liquid |
| Scent Name | Peppermint |
| Recommended Uses For Product | Professional Salon & Spa |
| Other Special Features Of The Product | Cleansed scalp and thicker, fuller hair |
Closest rivals on specs
Frequently asked questions
How much shampoo is in Nioxin System 2?
The listing gives 10.1 fluid ounces, with a listed weight of 10.08 ounces.
Does Nioxin System 2 shampoo work on colored hair?
The listing names natural hair, so it is not aimed at colored hair, though it says the shampoo suits all hair colors.
What is the active ingredient?
Salicylic acid is listed, with niacinamide and biotin named in the item highlight.
Is this a full thickening system?
No. It is a shampoo, one step of a System 2 line, and the listing includes no conditioner or treatment.