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Side by side

Biolage Biolage Smooth Proof Shampoo vs Biolage Scalp Sync Shampoo

93% function match · 11 of the 13 functions we compared match Formula overlap 52%. Biolage Biolage Smooth Proof Shampoo and Biolage Scalp Sync 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
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When each one is the right call

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

  • Biolage Smooth Proof Shampoo — protein-sensitive hair
  • Scalp Sync Shampoo — 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 Smooth Proof Shampoo — 33.8 oz container Biolage

Biolage Smooth Proof Shampoo

  • Shampoo
  • Salon
  • Protein-free
  • Lightweight
Biolage Scalp Sync Shampoo — container, alternate view Biolage

Scalp Sync Shampoo

  • Shampoo
  • Salon
  • Protein-free
  • Moisture-rich
Price, size & price per ounce
$47.18 33.8 oz · $1.40/oz
$27 13.5 oz · $2.00/oz

Compared at different sizes — 33.8 oz against 13.5 oz. Per-ounce prices favour the larger bottle.

Value / price positioning
Priced with its peers $$$$$ Salon tier · costs less than 52% of the 817 shampoos we’ve priced
Upper-mid price for a shampoo $$$$$ Salon tier · costs more than 62% 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 Same
High Humectants near the top — water-binding is a headline mechanism here. Your hair
High Humectants near the top — water-binding is a headline mechanism here. 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
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 Same
None No protein or amino acids in the list. Your hair
None No protein or amino acids in the list. Your hair
Silicone / wax buildup Same
High Water-insoluble silicones or waxes: a detergent wash is what removes them. Your hair
High Water-insoluble silicones or waxes: a detergent wash is what removes them. Your hair
Clarifying wash needed
Moderate Your hair
Moderate 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
  • Protein-sensitive hairthat stiffens when protein is added
  • Fast-oiling scalpsthat need a real reset wash
  • Fine hairthat flattens under most products
  • Very dry hairno fast-drying alcohol in the list
  • Protein-sensitive hairthat stiffens when protein is added
  • Fast-oiling scalpsthat need a real reset wash
  • Dry, thirsty hairhumectants and emollients both sit up front
  • Very dry hairno fast-drying alcohol in the list
Why you might skip it
  • Scents bother youthis product carries a scent
  • Sulfate-free routinesit uses a sulfate detergent
  • Curly-method routinesthese silicones need a detergent to remove
  • Scents bother youthis product carries a scent
  • Sulfate-free routinesit uses a sulfate detergent
  • Curly-method routinesthese silicones need a detergent to remove
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
Smooth Proof
—
Where to buy
Target · Salons · Brand website
Grocery / mass · Salons
Free of
  • protein-free
  • protein-free
Scent
Scented, not described
Scented, not described
How often
—
every wash

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 Smooth Proof ShampooScalp Sync Shampoo
Water
Neutral
#1Leading
#1Leading
Sodium Laureth Sulfate
Cleanses
#2Leading
#2Leading
Glycerin
Moisturizes
#4Supporting
#4Supporting
Sodium Chloride
Stabilizes
#5Supporting
#7Supporting
Fragrance
Fragrance
#10Below the 1% line
#10Below the 1% line
Salicylic Acid
Active
#18Below the 1% line
#23Below the 1% line
Limonene
Fragrance
#21Below the 1% line
#19Below the 1% line
Hexyl Cinnamal
Fragrance
#22Below the 1% line
#24Below the 1% line
Sodium Lauryl Sulfate
Cleanses
#19Below the 1% line
#3Leading

What only one of them carries

Biolage Smooth Proof Shampoo

Scalp Sync Shampoo

Full ingredient list — Biolage Smooth Proof Shampoo (27)
Full ingredient list — Scalp Sync Shampoo (37)

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 Smooth Proof ShampooScalp Sync Shampoo
Supported
4
1
Partly supported
0
0
Stated by brand
0
3
Potential conflict
0
0

Biolage Smooth Proof Shampoo

  • Gently cleanses and instantly nourishes frizzy hairSupportedHelps hair feel hydrated.
  • Eliminate frizz with a protective layerSupportedSmoother strands, less frizz.
  • Smooth, sleek, and manageable without weighing it downSupportedEasier detangling, less breakage.
  • Protects hair from humiditySupportedSmoother strands, less frizz.

Scalp Sync Shampoo

  • Helps reduce the appearance of dandruff and visible flakesStated by brandSoothing, not an active treatment.
  • Supports scalp balance by helping remove buildup and excess oils while maintaining hair comfortSupportedResets a coated scalp.
  • Refreshing cleansing care for a cleaner, healthier-looking scalp environmentStated by brandCan’t be confirmed from label.
  • Developed for dandruff-prone scalp concernsStated by brandSoothing, not an active treatment.

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 Smooth Proof Shampoo draws complaints about tangling and breakage; Biolage Scalp Sync Shampoo draws complaints about irritation.

Biolage Smooth Proof Shampoo

Reviewers with frizzy or curly hair report the shampoo noticeably reduces frizz and improves manageability, especially when used with the rest of the Smooth Proof system

frizzy/curly hair, used as part of full system (shampoo+conditioner+leave-in+serum)

Reviewers describe a pleasant scent and good lather with a lightweight, non-greasy after-feel

general users

Some reviewers report increased dryness, tangling, or breakage after use, occasionally attributing it to well/hard water rather than the product itself

mixed reports, some describe hair feeling worse; a subset cite hard/filtered water conditions

A few reviewers note the price is high relative to bottle size and wish for a pump dispenser on the large bottle

price-sensitive and repeat buyers

Scalp Sync Shampoo

Many reviewers say the shampoo visibly reduced dandruff and flaking within the first few washes, especially when used with the rest of the Scalp Sync line.

reviewers with dandruff

A few reviewers reported skin reactions such as neck or scalp irritation and hives, in at least one case tied to a known allergy to an ingredient in the formula.

reviewers with sensitive skin or known allergies

Several long-time users say a past reformulation made the shampoo noticeably less effective at controlling their dandruff than it used to be.

long-time repeat buyers

A large minority of reviewers report the opposite: the shampoo left their scalp and hair very dry or brittle, sometimes described as 'straw-like,' and required extra conditioning to recover.

reviewers with dry-leaning scalps or hair

Reviewers are split on the mint/menthol scent and cooling tingle: many find it refreshing, but a notable share call it too strong or medicinal-smelling.

general reviewers

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.

$1.40/oz vs $2.00/oz — Biolage Scalp Sync Shampoo costs about 1.4× more per ounce than Biolage Biolage Smooth Proof Shampoo.

$0.00/oz median $1.48/oz $17.29/oz $1.40/oz Biolage Smooth Proof Shamp $2.00/oz Scalp Sync Shampoo

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

Value readBiolage Smooth Proof ShampooScalp Sync Shampoo
Label
Priced with its peersSits 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.

Biolage Smooth Proof Shampoo vs John Frieda Brilliant Brunette Color Vibrancy ShampooJohn Frieda · 94% function matchScalp Sync Shampoo vs Kerastase Nutritive Bain Satin Riche ShampooKerastase · 94% function matchBiolage Smooth Proof Shampoo vs Food For Soft Hydrating Shampoo for Dry & Brittle HairMatrix · 94% function matchScalp Sync Shampoo vs Elvive Glycolic Gloss Shine Boosting ShampooL'Oreal Paris Elvive · 94% function matchBiolage Smooth Proof Shampoo vs Dove Beauty Cucumber Moisture Hair Shampoo Pump with Bio-Protein Care & Cucumber ExtractDove · 93% function matchScalp Sync Shampoo vs Garnier Fructis Grow Strong Fortifying ShampooGarnier Fructis · 94% function matchBiolage Smooth Proof Shampoo vs Garnier Fructis Triple Nutrition ShampooGarnier Fructis · 93% function matchScalp Sync Shampoo vs Kerastase Discipline Bain Fluidealiste ShampooKerastase · 94% function match

Biolage Smooth Proof Shampoo · Scalp Sync 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.
  • 8 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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