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Side by side

Biolage Biolage Volume Boost Conditioner vs Biolage Smooth Proof Conditioner

45% function match · 4 of the 10 functions we compared match Formula overlap 49%. Biolage Biolage Volume Boost Conditioner and Biolage Smooth Proof Conditioner share 2 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 Conditioner — maximum slip
  • Smooth Proof Conditioner — protein-sensitive 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
Biolage Biolage Volume Boost Conditioner — 33.8 oz container Biolage

Biolage Volume Boost Conditioner

  • Conditioner
  • Salon
  • Sulfate-free
Biolage Smooth Proof Conditioner — 33.8 oz container Biolage

Smooth Proof Conditioner

  • Conditioner
  • Salon
  • Sulfate-free
  • Silicone-free
Price, size & price per ounce
$47.18 33.8 oz · $1.40/oz
$45 33.8 oz · $1.36/oz
Value / price positioning
Priced with its peers $$$$$ Salon tier · costs less than 55% of the 689 conditioners we’ve priced
Priced with its peers $$$$$ Salon tier · costs less than 56% of the 689 conditioners 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
None found No humectants found — nothing here pulls water into the hair. Your hair
High Humectants near the top — water-binding is a headline mechanism here. Your hair
Oils and butters Differs
None No oils or butters in the list. Your hair
Moderate Oils sit high in the list — a softening, coating formula. Your hair
Slip / detangling Same
High Conditioning agents sit high in the list — this is a detangling formula. Your hair
High Conditioning agents sit high in the list — this is a detangling formula. Your hair
Weight on hair Same
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
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 Differs
Minor Protein appears, low enough to be a supporting ingredient. Your hair
None No protein or amino acids in the list. Your hair
Silicone / wax buildup Differs
High Water-insoluble silicones or waxes: a detergent wash is what removes them. Your hair
None Nothing here needs a detergent wash to remove. Your hair
Clarifying wash needed
High Your hair
Moderate 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
  • Maximum slipfor hair that tangles the moment it is wet
  • Matte, textured stylesabsorbent powders do the mattifying
  • Cuticle-smoothing pHa pH adjuster brings it to the acidic range hair prefers
  • A wide range of haira middle-of-the-range weight
  • Protein-sensitive hairthat stiffens when protein is added
  • Maximum slipfor hair that tangles the moment it is wet
  • Dry, thirsty hairhumectants and emollients both sit up front
  • Curly-method routinesno sulfates and no water-insoluble silicones
Why you might skip it
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • Very dry or damaged hairit contains fast-drying alcohol
  • Scents bother youthis product carries a strong scent
  • Very dry or damaged hairit contains fast-drying alcohol
  • Hair that needs proteinthere is none in this list
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
Conditioner
Conditioner
Line
Volume Boost
Smooth Proof
Where to buy
Target · Salons · Brand website
Target · Salons · Brand website
Free of
  • sulfate-free
  • sulfate-free
  • silicone-free
  • protein-free
  • curly-method compatible
Vegan
Vegan · label states
—
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 ConditionerSmooth Proof Conditioner
Water
Neutral
#1Leading
#1Leading
Cetearyl Alcohol
Softens
#2Leading
#2Leading
Behentrimonium Chloride
Detangles
#5Supporting
#4Supporting
Fragrance
Fragrance
#6Below the 1% line
#9Below the 1% line
Isopropyl Alcohol
Drying
#8Below the 1% line
#7Below the 1% line
Limonene
Fragrance
#12Below the 1% line
#13Below the 1% line
Phenoxyethanol
Stabilizes
#9Below the 1% line
#6Below the 1% line

What only one of them carries

Biolage Volume Boost Conditioner

Smooth Proof Conditioner

Full ingredient list — Biolage Volume Boost Conditioner (24)
Full ingredient list — Smooth Proof Conditioner (14)

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 ConditionerSmooth Proof Conditioner
Supported
1
3
Partly supported
1
0
Stated by brand
2
0
Potential conflict
0
0

Biolage Volume Boost Conditioner

  • Weightlessly moisturizes hair without weighing it downStated by brandCan’t be confirmed from label.
  • Boosts volume and lifts rootsPartly supportedNeutral on lift.
  • Infused with microfiltered soy protein and polymersStated by brandCheck the position, not the name.
  • Vegan formula with no animal derived ingredients or byproductsSupportedMatches our researched record.

Smooth Proof Conditioner

  • Smooths and nourishes naturally prone frizzy hairSupportedHelps hair feel hydrated.
  • Instantly detangles and leaves hair more manageableSupportedEasier detangling, less breakage.
  • Provides hydration without weighing hair downSupportedHelps hair feel hydrated.

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.

Biolage Biolage Volume Boost Conditioner draws complaints about dryness and frizz; Biolage Smooth Proof Conditioner draws complaints about the price and the packaging.

Biolage Volume Boost Conditioner

Other reviewers with fine hair report the opposite: real added body and shine without any heaviness, especially when paired with the matching shampoo.

fine hair types

A number of reviewers report the conditioner left their scalp or hair dry, itchy, or frizzy rather than moisturized.

no specific hair type identified in these reviews

Reviewers with fine, straight or oily hair frequently say this conditioner weighs their hair down rather than boosting volume as advertised.

fine and/or oily hair types

Multiple review titles in this pool reference a differently-named product (Full-Lift Volumizing Conditioner), suggesting a shared/pooled review feed rather than themes exclusive to Volume Boost.

flagged for provenance, not a hair-type pattern

Smooth Proof Conditioner

Multiple reviewers praise the scent as pleasant and long-lasting

general users

Reviewers with fine or coarse/curly hair report fuller, bouncier, healthier-looking hair and effective frizz control after regular use

fine hair and coarse/natural-textured hair users

A recurring complaint that a package-size reduction (reviewers describe roughly 40% less product) at the same price amounts to shrinkflation

long-time repeat buyers

Some reviewers report a reformulation (not just packaging) left hair drier and less smooth than the version they remembered

long-time users comparing to an earlier formula

A subset of reviewers find the smoothing/frizz-control effect underwhelming relative to expectations set by marketing or a sample

users trying the product after a sample or on high-frizz hair

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.

$1.36/oz vs $1.40/oz — within about the same cost per ounce.

$0.09/oz median $1.60/oz $56.25/oz $1.40/oz Biolage Volume Boost Condi $1.36/oz Smooth Proof Conditioner

Every mark sits on one distribution because these are compared against the same set: 689 conditioners with a computable unit price.

Value readBiolage Volume Boost ConditionerSmooth Proof Conditioner
Label
Priced with its peersSits in the middle of the range for conditioners per ounce.
Priced with its peersSits in the middle of the range for conditioners 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.

Biolage Volume Boost Conditioner vs Big Boost Up Volumizing Conditioner with CollagenSexy Hair · 97% function matchSmooth Proof Conditioner vs Glow Mania Color Protecting ConditionerMatrix · 100% function matchBiolage Volume Boost Conditioner vs Sleek Shine Leave-In ConditionerGarnier Fructis · 93% function matchSmooth Proof Conditioner vs Ultra Hydra Source ConditionerBiolage · 100% function matchBiolage Volume Boost Conditioner vs Lavender Lychee Scalp Soothing ConditionerMielle · 90% function matchSmooth Proof Conditioner vs Symbiose Fondant Apaisant Essentiel ConditionerKerastase · 100% function matchBiolage Volume Boost Conditioner vs Royal Oils Moisture Renewal Conditioner with Coconut OilHead & Shoulders · 90% function matchSmooth Proof Conditioner vs Elevate Weightless Volume ConditionerRusk · 100% function match

Biolage Volume Boost Conditioner · Smooth Proof Conditioner · All conditioners 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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