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Biolage

Scalp Sync Purifying & Exfoliating Concentrate

Scalp treatment

  • Scalp treatment
  • Sulfate-free
  • Silicone-free
  • Protein-free
  • Vegan · label states
  • Cruelty-free · label states
Size6.8 fl oz (200 ml)
Price$26–29 Good valuecommonly seen · 6.8 oz
Price / oz$4.13/ozat 6.8 oz

Add it to your products. We’ll tell you if it’s ever recalled.

Scent:

The ingredient list declares fragrance. What it smells of is not stated, and we do not guess.

Manufacturer page: cosmeticloveshop.us

Personal fit

Is this right for you?

Complete the consultation to see how well this product fits your hair and your goals. With 6,000+ products in our library, we can match you to the right ones.

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  • Your goals, scalp, damage history, water, budget, and scent preferences all shape your plan.

$49 with 60 days of follow-up questions and plan updates

$99 with 12 months. Pay once; the year renews only if you choose.

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Priced with its peers

$4.13/oz at 6.8 oz, less than 73% of the 280 scalp treatments , which mostly run $3.84–19.05/oz.

Price and stores

Great for

Protein-sensitive hairthat stiffens when protein is added
Fine hairthat flattens under most products
Silicone-free routinesno silicones appear in the list
Vegan and cruelty-freeour researched record has it as both

Maybe skip if

this product has a scent
Very dry or damaged hairit contains fast-drying alcohol
Dry or very humid airwhere heavy humectants work against you
Tight budgetsit sits in the upper price tiers

Whether this much richness suits you depends on your strand thickness, porosity and how easily your hair goes flat. We work that out in the consultation.

What the formula actually does

Read from the label, not the marketing

Each row says where it comes from: F means we derived it from this product’s own ingredient list, S means it is a claim the brand makes that the formula neither confirms nor contradicts.

Slip and detangling Little

Nothing here is built to reduce combing force.

Oils and butters None

No oils or butters in the list.

Weight on the hair Light

Water-first and light: unlikely to flatten fine hair.

Water-binding (humectants) High

Humectants near the top: binding water is one of its main jobs.

Protein None

No protein or amino acids in the list.

Needs detergent to remove No

Nothing here needs a detergent wash to remove.

Hard-water defence Chelators present

Contains chelators, which bind hard-water and pool minerals.

Fragrance Present

Fragrance is listed; it sits below the working ingredients.

from the formula stated by the brand reported by reviewers Scale: 1 dot low · 5 dots high, within this product type.

Ingredients that matter

The ingredients that change a decision

The workhorse ingredients, plus anything lower down that changes a decision. The chips name what an ingredient does. They are not safety scores, and no ingredient here is rated good or bad on its own.

IngredientWhat it doesWhy it mattersChip
WaterAqua / Water / Eau solvent The base everything else is dissolved in Neutral
Alcohol Denat. drying alcohol Speeds drying but can leave hair feeling dry Drying
Butylene Glycol humectant Pulls water into the hair Moisturizes
Hydroxyethylpiperazine Ethane Sulfonic Acid (HEPES)Hydroxyethylpiperazine Ethane Sulfonic Acid pH adjuster Fine-tunes the pH pH balancer
Propanediol humectant Adds a little water-binding Moisturizes
Glycolic Acid exfoliant A little exfoliation pH balancer
Sodium Hydroxide pH adjuster Fine-tunes the pH pH balancer
PEG-40 Hydrogenated Castor Oil solubilizer Helps dissolve the oils Stabilizes
FragranceParfum / Fragrance fragrance The scent Fragrance
Limonene fragrance The scent Fragrance
What the list leaves out, and what it carriesNo sulfates or silicones. Protein-free: this is built for moisture rather than for strengthening. Contains fragrance. Chelators for hard water.
Full ingredient list (21)

In the US, ingredients above 1% are listed from most to least. Below 1% they can appear in any order. Each note keeps three things apart: what the ingredient generally does, its role in this type of product, and what its position can tell you.

  • 1 Water · Aqua / Water / Eau
    General function

    The base of almost every rinse-off and cream hair product. It carries everything else and is normally the first ingredient on the label.

    Leading ingredient

    Listed in the first three ingredients, it is likely a structural part of this formula.

    • solvent
  • 2 Alcohol Denat.
    General function

    Fast-drying alcohol used to make sprays set quickly. In leave-on products it can leave hair feeling dry, especially in high position on the list.

    Leading ingredient

    Listed in the first three ingredients, it is likely a structural part of this formula.

    May suitFine or easily flattened hair

    Evaporates on contact, which is how a spray sets almost instantly and leaves no weight behind it.

    May not suitDry, coarse, or high-porosity hair

    Porous hair gives water up easily as it is; a fast-evaporating solvent high on the list accelerates that.

    May not suitVery dry or highly damaged hair

    It evaporates quickly and takes some water with it. On hair already short of moisture, a formula built on a lot of it can finish drier than it started.

    PubChem
    • drying alcohol
    • solvent
  • 3 Butylene Glycol
    General function

    A light humectant and carrier that helps extracts dissolve.

    Leading ingredient

    Listed in the first three ingredients, it is likely a structural part of this formula.

    May suitFine or easily flattened hair

    Light and water-binding rather than oily, so it adds less weight than oils or butters do.

    May suitVery dry or highly damaged hair

    A small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.

    DependsClimate-sensitive or frizz-prone hair

    A humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.

    PubChem
    • humectant
    • solvent
  • ▾Below about here, the order stops meaning much. These are usually used at 1% or less.
  • 4 Hydroxyethylpiperazine Ethane Sulfonic Acid (HEPES) · Hydroxyethylpiperazine Ethane Sulfonic Acid
    General function

    A buffer that holds a formula at a steady pH. It appears in some scalp serums alongside acids such as salicylic acid.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    • pH adjuster
  • 5 Propanediol
    General function

    A corn-derived humectant and solvent, often chosen as a lighter-feeling alternative to propylene glycol.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May suitFine or easily flattened hair

    Light and water-binding rather than oily, so it adds less weight than oils or butters do.

    May suitVery dry or highly damaged hair

    A small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.

    DependsClimate-sensitive or frizz-prone hair

    A humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.

    PubChem
    • humectant
    • solvent
  • 6 Glycolic Acid
    General function

    The smallest fruit acid, used in scalp products to loosen flakes and clear build-up.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    DependsFrizz-prone, damaged, or high-friction hair

    pH adjusters are how a formula is brought to a chosen acidity, and an acidic formula keeps the cuticle lying flatter than an alkaline one. Which way this one moves the pH depends on the formula, and the finished pH is not on the label.

    PubChem
    • exfoliant
    • pH adjuster
  • 7 Sodium Hydroxide
    General function

    A strong base used in trace amounts to raise pH; fully neutralised in the finished product.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    DependsFrizz-prone, damaged, or high-friction hair

    The alkali half of a pH-adjusting pair, used in small amounts to bring a formula up to its target rather than to make it alkaline. Alkaline conditions raise the fibre's surface charge and lift the scales — but the finished pH is not on the label.

    International Journal of Trichology
    • pH adjuster
  • 8 PEG-40 Hydrogenated Castor Oil
    General function

    A castor-oil derivative that dissolves fragrance and oils into water so the product stays clear and does not separate.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    • solubilizer
    • emulsifier
  • 9 Caprylyl Glycol
    General function

    A gentle preservative helper that also holds a little moisture.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May suitVery dry or highly damaged hair

    Humectants bind water into the strand, and water — not oil — is what makes dry hair flexible instead of brittle.

    DependsClimate-sensitive or frizz-prone hair

    A humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.

    PubChem
    • preservative
    • humectant
  • 10 Potassium Sorbate
    • preservative
  • 11 Fragrance · Parfum / Fragrance
    General function

    An undisclosed blend of scent ingredients. Regulations let it stay unlisted, so a fragrance-free product is the only way to be certain what is not in it.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May not suitFragrance-sensitive routines

    Declared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.

    • fragrance
    • declared fragrance
  • 12 Tetrasodium Glutamate Diacetate
    General function

    A biodegradable hard-water chelator used in place of EDTA.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May suitBuild-up-sensitive routines

    Binds the calcium and magnesium in hard water, which is what stops mineral deposits accumulating on the strand wash after wash.

    May suitGray, silver, or brass-prone hair

    Copper and iron carried in tap water deposit on the strand and read as a dull, warm cast on gray or light hair. A chelator holds those metals in solution so the wash carries them off.

    PubChem
    • hard-water chelator
  • 13 Saccharomyces/Xylinum/Black Tea Ferment
    • botanical extract
  • 14 Propylene Glycol
    General function

    A small humectant and solvent that keeps formulas stable and helps active ingredients spread.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May suitFine or easily flattened hair

    Light and water-binding rather than oily, so it adds less weight than oils or butters do.

    May suitVery dry or highly damaged hair

    A small water-binding solvent. It holds moisture and helps the rest of the formula spread evenly over the strand.

    DependsClimate-sensitive or frizz-prone hair

    A humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.

    PubChem
    • humectant
    • solvent
  • 15 Limonene
    General function

    A citrus-smelling fragrance component that EU rules require to be named separately because some people react to it.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May not suitFragrance-sensitive routines

    One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

    PubChem
    • fragrance
    • named fragrance allergen
  • 16 Glycerin
    General function

    Glycerin, also called glycerol, attracts moisture and mixes completely with water.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May suitDry, coarse, or high-porosity hair

    High-porosity hair loses water fast; a humectant holds some of it in place for longer than the wash itself would.

    May suitVery dry or highly damaged hair

    Binds water into the outer layers of the strand, and water is what makes dry hair flexible again rather than brittle.

    DependsClimate-sensitive or frizz-prone hair

    Water moves both ways. Measured across concentrations, glycerin solutions give water up in some conditions and take it from the air in others. What it does for you depends on how much of it is there and on the air around it.

    Scientific Reports
    • humectant
  • 17 Sorbitol
    General function

    A sugar-based humectant that adds moisture and a slight cushiony feel.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May suitDry, coarse, or high-porosity hair

    High-porosity hair loses water fast; a humectant holds some of it in place for longer than the wash itself would.

    May suitVery dry or highly damaged hair

    Binds water into the outer layers of the strand, and water is what makes dry hair flexible again rather than brittle.

    DependsClimate-sensitive or frizz-prone hair

    A humectant moves water in whichever direction the air allows: it holds moisture in humid conditions and can pull it back out of hair in very dry ones.

    PubChem
    • humectant
  • 18 Camellia Sinensis (Green Tea) Leaf Extract · Camellia Sinensis Leaf Extract
    • botanical extract
    • antioxidant
  • 19 Citric Acid
    General function

    Used to bring the product to a slightly acidic pH, which helps the cuticle lie flat. It is almost always near the end of the list.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May suitBuild-up-sensitive routines

    Holds hard-water minerals in solution so they rinse away instead of depositing on the hair.

    May suitFrizz-prone, damaged, or high-friction hair

    The acid side of pH adjustment, and the reason it matters is measured: alkaline formulas raise the fibre's surface negative charge, increase friction between strands and lift the scales, while lower-pH ones do the reverse.

    May suitGray, silver, or brass-prone hair

    Where a warm cast comes from water minerals rather than from the hair itself, holding those metals in solution is what removes it.

    International Journal of Trichology
    • pH adjuster
    • hard-water chelator
  • 20 Sodium Benzoate
    • preservative
  • 21 Ascorbic Acid
    • antioxidant
    • vitamin

What the whole list adds up to

  • 6 humectants
  • 5 solvents
  • 4 pH adjusters
  • 3 preservatives
  • 2 fragrances
  • 2 hard-water chelators
  • 2 botanical extracts
  • 2 antioxidants
  • 1 drying alcohol
  • 1 exfoliant
  • 1 solubilizer
  • 1 emulsifier
  • 1 declared fragrance
  • 1 named fragrance allergen

Ingredient list captured 2026-09-16. Formulas change, so check the package in your hand when an ingredient matters to you.

Price · 6.8 oz

Commonly seen $26–29 Midpoint $28 · 4 stores · checked Sep 17
Good value under $62 Under $9.15/oz it costs less than three-quarters of the 7 products we score as doing the same job

Usually a good value. Most stores sell it under the $62 line, and products that do this job typically go for about $127 at this size.

Show the price ladder
Where we’ve seen it5 listings · 5 stores

Sorted by price per ounce. Dated observations from our research, not live prices. Direct store pages, no affiliate links. We don’t sell this product.

How we work this out
  1. 6.8 oz is the size stores list most often; every comparison on this page is made at it. Other sizes are shown in the Sizes row and the store list.
  2. Commonly seen is the middle half of current prices for the 6.8 oz at recognised stores. We leave out the cheapest and most expensive quarters, so one sale or one overpriced listing can’t move it.
  3. Good value under $62 comes from the 7 products we score as doing the same job as this one. A quarter of them cost less than $9.15/oz; at 6.8 oz that is $62. Under that line you are paying less than most of them.
  4. About $127 is what those same products typically cost at this size: the midpoint of their prices per ounce, scaled to 6.8 oz.

Formula

Formula score
3 of 10

It costs about what other scalp treatments cost per ounce, but the formula leaves out conditioning agents up front, which most of the format carries.

How the score is counted
  • Costs less per ounce than 73% of the 280 scalp treatments we’ve priced
  • No conditioning agents up front in the formula
  • No oils or butters in the working zone either
  • Reviewers mention 2 things they like about how it performs
  • Conditioning agents up frontWhat makes wet hair comb through.3 pts
  • Oils or butters in the working zoneSoftens the strand rather than just coating it.2 pts
  • Slip for detanglingReduces the force it takes to comb wet hair.2 pts
  • A humectantBinds water into the hair.1 pt
  • A pH adjusterBrings the formula to the acidic pH hair prefers.1 pt
  • Fragrance kept out of the top eightScent as a finishing touch, not a major share.1 pt

The formula score measures completeness for the job: a weighted share of the systems this product type is usually built around that we find in this list. It does not rate how well the product works or its quality, and it never compares across product types.

Does the same job

Formulas that do the same things (cleanse, condition, coat or hold) for less per ounce. Scent, texture and where you buy them can still differ.

DavinesLowest cost per oz ELEVATING Scalp Recovery Treatment $13.91/oz $9.78/oz more
  • Protein-free
  • Lightweight
  • Silicone-free
· Same function
Differs
  • Prestige tier
  • 3.4 oz bottle
Compare
Leonor GreylSame function Sérum Énergisant $76.33/oz $72.20/oz more
  • Protein-free
  • Lightweight
  • Silicone-free
Differs
  • Amber scent
  • Prestige tier
  • 1.7 oz bottle
Compare
Act+AcreSame function Daily Hydro Scalp Serum with Hyaluronic Acid $24.00/oz $19.87/oz more
  • Fragrance-free
  • Unscented
  • Protein-free
Differs
  • Unscented
  • Masstige tier
  • 1 oz bottle
Compare

See more alternatives in the product library

These products do a similar job. We haven’t matched them to you. Find the one that fits your hair, routine and budget

Suits every hair pattern

Final decision

Should you buy it?

Good for the right person
Best user

Hair that stiffens on protein, for a protein-free formula and something that will not weigh hair down

Biggest tradeoff

Less suited to anyone sensitive to fragrance, very dry or high-damage hair, or very dry or very humid climates

Best alternative if not

Nothing in our library matches it closely at a lower price.

We do not sell products or take placement fees. This page states what the formula and the prices show; the consultation is what matches it to a person.

Claims check

What the brand says, and what the formula shows

Claims are quoted from the brand. We mark a claim supported, partly supported or conflicting only when the ingredient list speaks to it. Everything else stays "stated by the brand". That isn’t a criticism: most claims can’t be checked from a label.

2
SupportedBacked by ingredients
0
Partly supportedSome supporting logic
0
Stated by brandNo clear evidence
2
Potential conflictFormula works against claim
Exfoliates and clarifies scalp after one use

The detergent system is gentle; it is unlikely to clear heavy build-up on its own.

  • Glycolic Acid
  • Tetrasodium Glutamate Diacetate
  • Citric Acid
Potential conflict

Too gentle for real build-up.

Removes buildup, excess oil, impurities, and dead skin

The detergent system is gentle; it is unlikely to clear heavy build-up on its own.

  • Glycolic Acid
  • Tetrasodium Glutamate Diacetate
  • Citric Acid
Potential conflict

Too gentle for real build-up.

Suitable for sensitive scalps and color-treated hair

It avoids sulfate detergents, which are the usual cause of fast fade.

  • Camellia Sinensis (Green Tea) Leaf Extract
Supported

Less fade per wash.

Soothes and hydrates scalp for up to 72 hours

Humectants or rich emollients sit in the first eight ingredients.

  • Butylene Glycol
  • Propanediol
  • Caprylyl Glycol
Supported

Helps hair feel hydrated.

How to read this

We look at the first 10–15 ingredients and what they do in a formula, not at the marketing. If the list doesn't speak to a claim, we don't assume.

Reviewers

What people report

Themes that come up again and again in sourced reviews, written by our researchers in their own words. We don’t store or scrape star ratings.

several reviewers with dry, itchy or eczema-affected scalps report significant relief after weeks of consistent use

reviewers with chronic dry/itchy scalp conditions

many reviewers with oily or buildup-prone scalps say it visibly reduces oil and extends time between washes when used weekly

reviewers with oily scalp, often paired with the matching shampoo/conditioner

reviewers repeatedly describe the texture as very thin and watery, making it hard to control and easy to overuse or spill

general reviewers

a recurring caution among reviewers is the product's sun-sensitivity warning, which several found off-putting or worrying for summer use

reviewers noting the AHA sun-sensitivity label

several reviewers who did not see results for dandruff or oiliness still praised the scent and the ritual feel of the pre-wash step

reviewers unconvinced of efficacy but positive on sensory experience

More from Biolage

How this page was made

  • Everything above comes from our researched product record: identity, the ingredient list as printed, the brand's own claims, dated prices and review themes our researchers wrote in their own words. No part of this page is written by hand for one product.
  • 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.
  • Both scores out of ten are defined on this page. The formula score is completeness for the job, computed from a fixed per-format checklist shown beneath the gauge; the price score is cost per ounce against every product of this type we have priced.
  • 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.
  • 5 sources consulted for this product (2 manufacturer or regulatory, 0 retailer, 3 editorial), last checked 2026-09-17.
  • Ingredient references are linked for 12 of 13 product-aware annotations on this page. Fit notes are general formulation guidance. They aren’t a verdict on the finished product or on you.
  • We haven’t tested this product in a lab, and we don’t physically test your hair. Formula readings come from the ingredient list. Claims about how it behaves are labelled as the brand's.
  • Ingredient order tells you relative amount only above roughly 1%. Prices are what we saw on the dates shown and can change.
  • Ingredient names link to our ingredient library, where each entry shows what it does, which product types use it, and where it usually sits on a label across everything we have researched.
  • This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.
  • Formula readings: derivation v23. Record last updated 2026-09-17.

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