Nioxin System 4 Scalp Cleansing Shampoo

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Product is rated as #24 in category Shampoo Comparisons


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  • Brand: Nioxin
  • Analyzed: 974 reviews. Ranks in top-10% by number of reviews
  • Mentions: 75 positive. Ranks in top-50% by share of positive mentions
  • Amazon rating: 4.7. Ranks in top-5% by Amazon ratings
Nioxin System 4 Scalp Cleansing Shampoo photo
Nioxin System 4 Scalp Cleansing Shampoo

Price History



Nioxin System 4 Scalp Cleansing Shampoo is highly effective for thinning hair, hair growth, hair health improvement, and hair loss prevention.

  • It ranks among the top 5% of shampoos for thinning hair and hair growth, and in the top 10% for hair health improvement and addressing oily hair.
  • Users have reported positive results in terms of cleaning hair, scalp health, shiny hair, and hair strengthening, placing it in the top 20% of shampoos.
  • The shampoo provideaverage results for hair softness, fuller and voluminous hair, damaged hair, residue removal, scent, and hair manageability, ranking in the top 50-60% of shampoos.
  • However, it may not be as effective for frizz control, moisturizing, natural ingredients, curly or wavy hair, and hair color preservation, ranking in the bottom 20-30% of shampoos in these categories.
Shampoo AttributeBG RatingNumber of MentionsPositive Review PercentageAttribute Ranking
Effectiveness on thinning hair4.928087%top-5%
Effectiveness in cleaning hair4.98890%top-20%
Effectiveness on Hair Growth4.88988%top-5%
Improvement of hair health4.8130100%top-10%
Effectiveness on hair loss4.624876%top-5%
Effectiveness on hair loss4.624876%top-5%
Effect on shiny hair4.531100%top-30%
Effectiveness in hair strengthening4.13197%top-20%
Impact on scalp health4.111285%top-20%
Effectiveness on oily hair4.06100%top-10%
Average performance
Effect on hair softness or silkiness3.92793%top-50%
Provision of fuller and voluminous hair3.719100%top-30%
Effectiveness on Damaged hair3.63368%top-40%
Effectiveness in residue or buildup removal3.61560%top-50%
Effect on hair manageability3.51471%top-60%
Hair dryness reduction after shampooing3.26229%bottom-20%
Shampoo chemical content3.02640%bottom-40%
Sulfate-free shampoo3.040%bottom-30%
Effectiveness on Frizz Control2.81141%bottom-20%
Moisturizing effect2.8367%bottom-20%
Natural Ingredients2.71450%bottom-30%
Curly or Wavy hair users shampoo experiences2.7841%bottom-20%
Effectiveness in hair color preservation2.74072%bottom-30%
Effect on hair tangling2.7956%bottom-40%
Squeaky clean hair feeling after shampoo use2.5250%bottom-10%
Degreasing properties2.5250%bottom-20%
Effectiveness on dandruff2.51452%top-30%
Effect on blonde hair shades2.5333%top-40%
Ability to neutralize brassy tones2.520%top-50%
Biotin in shampoo2.5367%top-40%
Effectiveness on psoriasis2.52100%top-40%
Too few reviews:
Effectiveness on flaky scalpfrew reviews
Purple Shampoo propertiesfrew reviews
Ash color maintenancefrew reviews
Effect on highlightsfrew reviews
Bleached hair maintenancefrew reviews
Effectiveness in providing toning benefitsfrew reviews
Tinting effect on hair shadesfrew reviews
Effectiveness on fungal infectionsfrew reviews
Effectiveness on seborrheic dermatitisfrew reviews

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How we determined rating score for Nioxin System 4 Scalp Cleansing Shampoo

We strongly believe that the best information about a shampoo's performance comes from actual users. This includes details like how well it works for different hair types, health benefits, look and feel, and any side effects. Our analysis and scoring method includes:
  • Using AI to collect shampoo reviews from major online stores. We analyze these reviews to find out what customers care about the most, like how the shampoo works for different hair types, its scent, and its effectiveness in treating scalp and hair issues such as dryness, flakiness, or oiliness. We also look at other factors like how well it moisturizes, adds shine, and affects hair tangling.
  • Once we identify the main topics customers talk about, which we call product attributes, we use special AI algorithms to track every mention of these attributes in each shampoo we study.
  • For each shampoo and attribute, we calculate several metrics, like how often it's mentioned, its percentage of all reviews, and the balance of positive and negative feedback. We then compare these numbers across different shampoos to create a comparative score for each one, done separately for every attribute.