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Side by side

Biolage Biolage Volume Boost Shampoo vs Kerastase Kerastase Densifique Bain Densite Shampoo

96% function match · 12 of the 13 functions we compared match Formula overlap 47%. Biolage Biolage Volume Boost Shampoo and Kerastase Kerastase Densifique Bain Densite Shampoo share 4 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.

  • Biolage Volume Boost Shampoo — fast-oiling scalps
  • Kerastase Densifique Bain Densite Shampoo — fast-oiling scalps

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
Biolage Biolage Volume Boost Shampoo — 33.8 oz container Biolage

Biolage Volume Boost Shampoo

  • Shampoo
  • Salon
  • Silicone-free
  • Moisture-rich
Kerastase Kerastase Densifique Bain Densite Shampoo — 8.5 oz container Kerastase

Kerastase Densifique Bain Densite Shampoo

  • Shampoo
  • Prestige
  • Silicone-free
  • Moisture-rich
Price, size & price per ounce
$27 33.8 oz · $1.10/oz
$45.99 8.5 oz · $5.41/oz

Compared at different sizes — 33.8 oz against 8.5 oz. Per-ounce prices favour the larger bottle.

Value / price positioning
Priced with its peers $$$$$ Salon tier · costs less than 62% of the 817 shampoos we’ve priced
Same job for less elsewhere $$$$$ Prestige tier · costs more than 95% of the 817 shampoos we’ve priced
Best for hair types
All types Nothing in the formula or the claims narrows this to one pattern. Your hair
All types Nothing in the formula or the claims narrows this to one pattern. Your hair
Moisture level Differs
High Humectants near the top — water-binding is a headline mechanism here. Your hair
Moderate Humectants in the working part of the formula. Your hair
Cleansing strength Same
Strong Removes oil, buildup, and most residue — a reset wash. Your hair
Strong Removes oil, buildup, and most residue — a reset wash. 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
Light Water-first and light: unlikely to flatten fine hair. Your hair
Medium Middle of the range — noticeable on fine hair, light on coarse hair. Your hair
Fragrance
Prominent Fragrance sits in the first eight ingredients — a larger share of the formula. Your hair
Present Fragrance is listed; it sits below the working ingredients. Your hair
Protein Same
Minor Protein appears, low enough to be a supporting ingredient. Your hair
Minor Protein appears, low enough to be a supporting ingredient. 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
High Thick foam that spreads quickly through the hair. Your hair
High Thick foam that spreads quickly through the hair. 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
None No chelating agent in the list. Your hair
None No chelating agent in the list. Your hair
Formula completeness
out of 10
Complete for its job
out of 10
Complete for its job
Who should choose this
  • Fast-oiling scalpsthat need a real reset wash
  • Dry, thirsty hairhumectants and emollients both sit up front
  • Fine hairthat flattens under most products
  • Silicone-free routinesno silicones appear in the list
  • Fast-oiling scalpsthat need a real reset wash
  • Dry, thirsty hairhumectants and emollients both sit up front
  • Silicone-free routinesno silicones appear in the list
  • Porous, damaged hairceramides are in the list
Why you might skip it
  • Scents bother youthis product carries a scent
  • Sulfate-free routinesit uses a sulfate detergent
  • Dry or damaged haira strong detergent system strips as it cleans
  • Scents bother youthis product carries a strong scent
  • Sulfate-free routinesit uses a sulfate detergent
  • Very dry or damaged hairit contains fast-drying alcohol
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
Volume Boost
—
Where to buy
Target · Salons · Brand website
Target · Salons
Free of
  • silicone-free
  • silicone-free
Cruelty-free
—
Not 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

IngredientBiolage Volume Boost ShampooKerastase Densifique Bain Densite Shampoo
Water
Neutral
#1Leading
#1Leading
Sodium Laureth Sulfate
Cleanses
#2Leading
#2Leading
Sodium Chloride
Stabilizes
#6Supporting
#5Supporting
Glycol Distearate
Softens
#7Supporting
#4Supporting
Fragrance
Fragrance
#8Below the 1% line
#32Below the 1% line
Salicylic Acid
Active
#15Below the 1% line
#15Below the 1% line
Hexyl Cinnamal
Fragrance
#21Below the 1% line
#18Below the 1% line
Hexylene Glycol
Moisturizes
#12Below the 1% line
#7Supporting
Sodium Benzoate
Stabilizes
#9Below the 1% line
#8Below the 1% line
Linalool
Fragrance
#25Below the 1% line
#21Below the 1% line

What only one of them carries

Biolage Volume Boost Shampoo

Kerastase Densifique Bain Densite Shampoo

Full ingredient list — Biolage Volume Boost Shampoo (28)
Full ingredient list — Kerastase Densifique Bain Densite Shampoo (32)

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.

VerdictsBiolage Volume Boost ShampooKerastase Densifique Bain Densite Shampoo
Supported
2
0
Partly supported
0
3
Stated by brand
1
1
Potential conflict
1
0

Biolage Volume Boost Shampoo

  • Gently cleanses fine hair with minimal strippingStated by brandCan’t be confirmed from label.
  • Adds lightweight volumizing shineSupportedLeaves room for lift.
  • Provides root lift for lasting fullnessSupportedLeaves room for lift.
  • Suitable for color-treated hairPotential conflictLikely to pull colour faster.

Kerastase Densifique Bain Densite Shampoo

  • Adds density and volume to thinning hair with advanced densifying ingredientsPartly supportedNeutral on lift.
  • Strengthens and fortifies hair, providing a fuller appearancePartly supportedSupports the surface, not a treatment.
  • Gently cleanses while boosting hair thickness and resiliencePartly supportedSupports the surface, not a treatment.
  • Rich, creamy latherStated by brandCan’t be confirmed from label.

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.

Kerastase Kerastase Densifique Bain Densite Shampoo draws complaints about dryness and the packaging.

Biolage Volume Boost Shampoo

Long-time users report a recent reformulation that reduced volumizing performance, leaving hair flatter and weighed down compared to the prior formula

long-time/repeat buyers noting a formula change

A subset of reviewers report hair thinning, shedding, or an unwanted fragrance after switching to this product

general users, some longtime Matrix/Biolage customers

Some reviewers object to newly noticed ingredients (isopropyl alcohol, silicones/polymers) that they feel conflict with the product's premium positioning

ingredient-conscious repeat buyers

Several reviewers feel the price has risen relative to perceived value and are considering switching brands

price-sensitive repeat buyers

Kerastase Densifique Bain Densite Shampoo

Reviewers who found it worked describe it as "saving" damaged/thin hair and worth the price despite the cost

repeat buyers

Reviewers report fuller, "lustrous" hair and improved body after use

5-star Target reviewers

Multiple 1-star reviews complain of a strong, unpleasant "heavy perfume" scent and hair feeling dry after use

dissatisfied Target reviewers

Several complaints are about shipping/packaging (late delivery, cracked/leaking bottles) rather than the formula itself

Target online buyers

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.

$1.10/oz vs $5.41/oz — Kerastase Kerastase Densifique Bain Densite Shampoo costs about 4.9× more per ounce than Biolage Biolage Volume Boost Shampoo.

$0.00/oz median $1.47/oz $17.29/oz $1.10/oz Biolage Volume Boost Shamp $5.41/oz Kerastase Densifique Bain

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

Value readBiolage Volume Boost ShampooKerastase Densifique Bain Densite Shampoo
Label
Priced with its peersSits in the middle of the range for shampoos per ounce.
Same job for less elsewhereYou are paying above the range for a formula close to several lower-priced options.

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.

Biolage Volume Boost Shampoo vs Biolage VolumeBloom ShampooBiolage · 100% function matchKerastase Densifique Bain Densite Shampoo vs Anti-Dandruff + Dry Scalp ShampooAmerican Crew · 98% function matchBiolage Volume Boost Shampoo vs Kerastase Resistance Bain Force Architecte ShampooKerastase · 100% function matchKerastase Densifique Bain Densite Shampoo vs Kerastase Resistance Bain Force Architecte ShampooKerastase · 96% function matchBiolage Volume Boost Shampoo vs Total Results High Amplify Volumizing ShampooMatrix · 98% function matchKerastase Densifique Bain Densite Shampoo vs Kerastase Specifique Bain Divalent ShampooKerastase · 96% function matchBiolage Volume Boost Shampoo vs Instacure Anti-Breakage ShampooMatrix · 96% function matchKerastase Densifique Bain Densite Shampoo vs Volume Injection ShampooRedken · 96% function match

Biolage Volume Boost Shampoo · Kerastase Densifique Bain Densite 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.
  • 9 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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