R+Co Dallas Biotin Thickening Shampoo

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Product is rated as #131 in category Shampoo Comparisons


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  • Brand: R+Co
  • Analyzed: 316 reviews. Ranks in top-30% by number of reviews
  • Mentions: 67 positive. Ranks in top-80% by share of positive mentions
  • Amazon rating: 4.5. Ranks in top-40% by Amazon ratings
R+Co Dallas Biotin Thickening Shampoo photo
R+Co Dallas Biotin Thickening Shampoo

Price History



The R+Co Dallas Biotin Thickening Shampoo is a popular choice among customers, ranking in the top 30% of shampoos based on overall rating and number of reviews.


  • Effective in cleaning hair (86% positive)
  • Provides fuller and voluminous hair (91% positive)


  • Has an average effect on hair softness or silkiness (94% positive)
  • Moderately effective on thinning hair (82% positive)
  • Mixed opinions on shampoo chemical content (60% positive)


  • Negatively affects hair manageability (42% positive)
  • Limited effectiveness in residue or buildup removal (31% positive)
  • Does not perform well on oily hair (27% positive)
  • Limited success in frizz control (41% positive)
  • Limited effectiveness on damaged hair (39% positive)
  • Negative impact on scalp health (45% positive)
  • Mixed experiences for curly or wavy hair users (50% positive)
  • Concerns about natural ingredients (30% positive)
  • Limited effectiveness in hair color preservation (67% positive)
Shampoo AttributeBG RatingNumber of MentionsPositive Review PercentageAttribute Ranking
Effectiveness in cleaning hair4.52686%top-40%
Average performance
Provision of fuller and voluminous hair4.01191%top-30%
Effect on hair softness or silkiness3.92994%top-50%
Effectiveness on thinning hair3.85882%top-20%
Effectiveness on thinning hair3.85882%top-20%
Shampoo chemical content3.6560%top-50%
Effectiveness on hair loss3.64872%top-20%
Biotin in shampoo3.5590%top-30%
Improvement of hair health3.36175%bottom-40%
Effectiveness in hair strengthening3.2786%top-60%
Hair dryness reduction after shampooing3.26439%bottom-40%
Effect on shiny hair3.12584%bottom-30%
Effect on hair manageability2.91242%bottom-20%
Effectiveness in residue or buildup removal2.81331%bottom-20%
Effectiveness on oily hair2.81027%bottom-40%
Effectiveness on Frizz Control2.81441%bottom-20%
Effectiveness on Damaged hair2.8939%bottom-20%
Impact on scalp health2.61045%bottom-30%
Curly or Wavy hair users shampoo experiences2.6850%bottom-10%
Natural Ingredients2.6530%bottom-20%
Effectiveness in hair color preservation2.6367%bottom-20%
Effect on hair tangling2.640%bottom-20%
Effectiveness on dandruff2.5217%top-30%
Effect on blonde hair shades2.5650%top-40%
Too few reviews:
Effectiveness on flaky scalpfrew reviews
Degreasing propertiesfrew reviews
Moisturizing effectfrew reviews
Purple Shampoo propertiesfrew reviews
Ash color maintenancefrew reviews
Effect on highlightsfrew reviews
Bleached hair maintenancefrew reviews
Effectiveness in providing toning benefitsfrew reviews
Ability to neutralize brassy tonesfrew reviews
Sulfate-free shampoofrew reviews
Squeaky clean hair feeling after shampoo usefrew reviews
Tinting effect on hair shadesfrew reviews
Effectiveness on fungal infectionsfrew reviews
Effectiveness on psoriasisfrew reviews
Effectiveness on seborrheic dermatitisfrew reviews
Effectiveness on Hair Growthfrew reviews

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How we determined rating score for R+Co Dallas Biotin Thickening 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.