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Side by side

Ouidad VitalCurl+ Clear & Gentle Shampoo vs Rizos Curls Biotin Shampoo

93% function match · 12 of the 13 functions we compared match Formula overlap 3%. Ouidad VitalCurl+ Clear & Gentle Shampoo and Rizos Curls Biotin Shampoo share 3 ingredients among each other's most prominent.

Based on your consultation

Which of these fits your hair?

We check your pattern, moisture need, scalp, fragrance tolerance, weight sensitivity and more against each formula — and say which one lines up.

Your profile at a glance

  • Your answers appear here
  • Your answers appear here
  • Your answers appear here
  • Your answers appear here

When each one is the right call

What each formula is built for, from its own ingredient list.

  • VitalCurl+ Clear & Gentle Shampoo — colour-treated hair
  • Biotin Shampoo — colour-treated hair

Side by side

Every trait, aligned

One row per trait, read from each product’s own ingredient list and record. A dash means we have not researched that field for that product — it is not a “no”.

Trait
Ouidad VitalCurl+ Clear & Gentle Shampoo — 8.5 oz container Ouidad

VitalCurl+ Clear & Gentle Shampoo

  • Shampoo
  • Salon
  • Sulfate-free
  • Silicone-free
Rizos Curls Biotin Shampoo — 10 oz container Rizos Curls

Biotin Shampoo

  • Shampoo
  • Masstige
  • Sulfate-free
  • Silicone-free
Price, size & price per ounce
about $24 8.5 oz · $2.82/oz
$21.99 10 oz · $2.20/oz
Value / price positioning
Upper-mid price for a shampoo $$$$$ Salon tier · costs more than 72% of the 817 shampoos we’ve priced
Upper-mid price for a shampoo $$$$$ Masstige tier · costs more than 65% of the 817 shampoos we’ve priced
Best for hair types
Wavy–Coily The brand’s own claims name curly or textured hair. Your hair
All types Nothing in the formula or the claims narrows this to one pattern. Your hair
Moisture level Same
Moderate Humectants in the working part of the formula. Your hair
Moderate Humectants in the working part of the formula. Your hair
Cleansing strength Same
Moderate Removes oil and product; leaves some conditioning behind. Your hair
Moderate Removes oil and product; leaves some conditioning behind. Your hair
Slip / detangling Same
Moderate Conditioning agents are present, lower in the list. Your hair
Moderate Conditioning agents are present, lower in the list. Your hair
Weight on hair
Medium Middle of the range — noticeable on fine hair, light on coarse hair. Your hair
Medium Middle of the range — noticeable on fine hair, light on coarse hair. Your hair
Fragrance
Present Fragrance is listed; it sits below the working ingredients. Your hair
Present Fragrance is listed; it sits below the working ingredients. Your hair
Protein Differs
None No protein or amino acids in the list. Your hair
Prominent Protein high in the list — a strengthening formula, not a moisture one. Your hair
Silicone / wax buildup Same
None Nothing here needs a detergent wash to remove. Your hair
None Nothing here needs a detergent wash to remove. Your hair
Clarifying wash needed
Low Your hair
Low Your hair
Expected lather Same
Moderate An ordinary shampoo lather. Your hair
Moderate An ordinary shampoo lather. Your hair
Scalp active Same
None No over-the-counter scalp active. Your hair
None No over-the-counter scalp active. Your hair
Hard-water defence Same
Chelators present Chelators are present — they bind hard-water and pool minerals. Your hair
Chelators present Chelators are present — they bind hard-water and pool minerals. Your hair
Formula completeness
out of 10
Complete for its job
out of 10
Complete for its job
Who should choose this
  • Colour-treated hairthat fades faster in a sulfate wash
  • Protein-sensitive hairthat stiffens when protein is added
  • Dry, thirsty hairhumectants and emollients both sit up front
  • Curly-method routinesno sulfates and no water-insoluble silicones
  • Colour-treated hairthat fades faster in a sulfate wash
  • Protein-hungry hairthat stretches and stays stretched when wet
  • Curly-method routinesno sulfates and no water-insoluble silicones
  • Hard waterand swimmers dealing with mineral deposit
Why you might skip it
  • Scents bother youthis product carries a scent
  • Hair that needs proteinthere is none in this list
  • Tight budgetsit sits in the upper price tiers
  • Scents bother youthis product carries a scent
  • Protein-sensitive hairthat goes stiff or straw-like on protein
  • Picking it up locallywe have it recorded in one channel only
from the formula stated by the brand reported by reviewers Scale: 1 dot low · 5 dots high, within this product type.
More facts about each one
Type
Shampoo
Shampoo
Line
VitalCurl+
—
Where to buy
Salons · Brand website
Brand website
Free of
  • sulfate-free
  • silicone-free
  • protein-free
  • curly-method compatible
  • sulfate-free
  • silicone-free
  • curly-method compatible
Cruelty-free
Cruelty-free · PETA-listed
Cruelty-free · PETA-listed
Scent
Scented, not described
Scented, not described

Facts as we recorded them. A dash means we have not researched that field for that product — it is not a "no".

The bottom line

The bottom line depends on your hair

Which of these two suits you is a question about your hair, not about them. The consultation answers it — and tells you what your routine needs around it.

Take the consultation

$49.00 once, for your consultation and hair profile. No subscription, no required purchases.

The detail behind the table

Where the readings above come from: the ingredient lists themselves, each brand’s claims checked against them, what owners report, and cost per ounce in context.

Shared and distinct ingredients

Shared and distinct ingredients

Computed from the ingredient lists as printed. "Shared" means both lists carry it; where it sits on each label is stated, because position is what tells you how much.

What both formulas carry

IngredientVitalCurl+ Clear & Gentle ShampooBiotin Shampoo
Water
Neutral
#1Leading
#1Leading
Glycerin
Moisturizes
#7Supporting
#21Below the 1% line
Limonene
Fragrance
#29Below the 1% line
#36Below the 1% line
Fragrance
Fragrance
#31Below the 1% line
#22Below the 1% line

What only one of them carries

VitalCurl+ Clear & Gentle Shampoo

Biotin Shampoo

Full ingredient list — VitalCurl+ Clear & Gentle Shampoo (31)
Full ingredient list — Biotin Shampoo (36)

Claims check

What each brand says, against what each formula shows

Claims are quoted from each brand. We only mark one supported, partly supported, or conflicting when that product’s ingredient list actually speaks to it.

VerdictsVitalCurl+ Clear & Gentle ShampooBiotin Shampoo
Supported
0
0
Partly supported
0
0
Stated by brand
2
1
Potential conflict
0
0

VitalCurl+ Clear & Gentle Shampoo

  • Gently cleanses without stripping away natural oilsStated by brandCan’t be confirmed from label.
  • Rebalancing pH levels for optimal curl healthStated by brandCan’t be confirmed from label.

Biotin Shampoo

  • Proven to make your hair fuller, softer, shinier and more nourishedStated by brandOnly the brand’s testing shows this.

What owners say

What people report

Recurring themes our researchers wrote in their own words from sourced reviews. We do not store or scrape star ratings, and we never balance one product’s themes against another’s by inventing them.

Both praised for how it cleanses. Ouidad VitalCurl+ Clear & Gentle Shampoo draws complaints about the packaging.

VitalCurl+ Clear & Gentle Shampoo

Sulfate-free formula removes buildup while leaving hair feeling clean rather than dried out

Improved curl definition and shape retention without stiffness or crunch

classic and spiral curl reviewers

Softer texture and easier detangling after use

fine and thick curl reviewers

Improved scalp comfort, described as fresh and clean without irritation

sensitive-scalp reviewers

Isolated shipping complaints about damaged/leaking pump bottles, not a product-quality issue

Biotin Shampoo

Leaves hair feeling clean and light after just a couple of uses

Scent is frequently called out as a favorite feature

Cleanses without stripping natural scalp oils, described as gentle on the scalp with daily-ish use

Reviewers report noticeable hair growth and reduced dryness/stagnation over weeks of use

including Spanish-speaking reviewers

Rich lather from a small amount of product; users caution a little goes a long way or hair can feel greasy

curly-hair users

Price check

Cost per ounce, in context

Cost per ounce against every product of this type we have priced, each at the size it is most often sold in. Value labels are computed from that percentile and from how many products that do the same job cost less; they are comparisons, not judgements about a brand.

$2.20/oz vs $2.82/oz — Ouidad VitalCurl+ Clear & Gentle Shampoo costs about 1.3× more per ounce than Rizos Curls Biotin Shampoo.

$0.00/oz median $1.47/oz $17.29/oz $2.82/oz VitalCurl+ Clear & Gentle $2.20/oz Biotin Shampoo

Every mark sits on one distribution because these are compared against the same set: 817 shampoos with a computable unit price.

Value readVitalCurl+ Clear & Gentle ShampooBiotin Shampoo
Label
Upper-mid price for a shampooSits in the middle of the range for shampoos per ounce.
Upper-mid price for a shampooSits in the middle of the range for shampoos per ounce.

Computed from cost per ounce against every product of this type we have priced, and from how many products that do the same job cost less. It is a comparison, not a judgement about the brand.

Compare with something else

Close formulas to each of these, as their own comparison pages.

VitalCurl+ Clear & Gentle Shampoo vs SheaMoisture Virgin Coconut Oil Shampoo Daily HydrationSheaMoisture · 96% function matchBiotin Shampoo vs Pure Silk Moisturizing ShampooBounce Curl · 96% function matchVitalCurl+ Clear & Gentle Shampoo vs Essential Moisture ShampooCurlsmith · 96% function matchBiotin Shampoo vs TRESemme Cruelty-Free Keratin Smooth Color Sulfate-Free Shampoo for Color-Treated HairTRESemme · 93% function matchVitalCurl+ Clear & Gentle Shampoo vs Fragrance-Free ShampooCurlsmith · 96% function matchBiotin Shampoo vs Fortifying Shampoo with Amaranth PeptidesChristophe Robin · 91% function matchVitalCurl+ Clear & Gentle Shampoo vs Men Moisturizing Shampoo - Raw Shea Butter & Mafura OilSheaMoisture · 96% function matchBiotin Shampoo vs Simply Smoothing ShampooAcure · 90% function match

VitalCurl+ Clear & Gentle Shampoo · Biotin Shampoo · All shampoos in the library

How this page was made

  • This page is assembled from the same researched records the individual product pages render: identity, each ingredient list as printed, each brand's own claims, dated price observations, and review themes written in our researchers' own words. Nothing on it is written per comparison.
  • We do not rank these against each other. Which of them suits you depends on your hair, and that is what the consultation works out.
  • The formula similarity percentage is a stored, precomputed number: position-weighted overlap of the two ingredient lists blended with agreement on the attributes we derive. It measures how alike two formulas are, not how well either works.
  • The value band is a fixed label over two stored numbers: this product’s cost per ounce as a percentile of every product of this type we have priced, each at the size it is most often sold in, and how many products we score as doing the same job cost at least a quarter less per ounce.
  • The "Is this right for you?" panel reads only your own consultation answers, and it applies exactly the filters our recommendation engine applies. It is computed when you load the page and is never stored on it.
  • 10 sources were consulted across the products on this page.
  • Ingredient order tells you relative amount only above roughly 1%. Prices are observations on the dates shown and change without notice. We do not sell these products and take no placement fees.
  • This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.

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