Skip to main content
Kerastase

Resistance Masque Therapiste

Mask / Protein treatment, oil-rich

  • Mask / treatment
  • protein
  • Sulfate-free
  • Silicone-free
  • Curly-method
  • Not cruelty-free · PETA-listed
Size6.76 fl ozmost listed · 2 sizes
Price$60–68commonly seen · 6.76 oz · from $7.69/oz in the 16.9 oz
Price / oz$10.06/ozat 6.76 oz
Where to buy7 stores · 2 sizes

Scent:

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

Strength: Strong

Personal fit

Is this right for you?

Complete the consultation to see exactly how well this product fits your hair and your goals. With 2,400+ products in our library we can match exactly the right products to you.

  • In 10 minutes we can identify your exact hair condition and traits.
  • Every product matched against your hair across the 22 factors we check.
  • A personalized routine for your daily life — your schedule, styling habits, and local weather.
  • Find products that do the same job at a lower cost.
  • Your goals, scalp, damage history, water, budget, and scent preferences all shape your plan.

$49.00 one-time consultation, no subscription

Add the optional $49/year membership for unlimited adjustments for changes in weather and lifestyle.

Start your consultation

Same job for less elsewhere

$10.06/oz at 6.76 oz — more than 92% of the 341 masks and treatments , which mostly run $1.63–5.59/oz.

View alternatives

Great for

Maximum slipfor hair that tangles the moment it is wet
Curly-method routinesno sulfates and no water-insoluble silicones
Coarse or dry hairthat absorbs everything you give it
Silicone-free routinesno silicones appear in the list
Porous, damaged hairceramides are in the list
Very dry hairno fast-drying alcohol in the list

Maybe skip if

this product carries a strong scent
Oily scalp or fine hairthat gets weighed down
Vegan and cruelty-freeour record does not support both claims here
Tight budgetsit sits in the upper price tiers

Whether your hair needs moisture, protein, or bond repair right now depends on your damage history and how your hair behaves wet — that is what the consultation works out.

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.

Oils and butters Present, high in the list

Oils sit high in the list — a softening, coating formula.

Weight on the hair Rich

Heavy butters and waxes in the first eight ingredients.

Protein Minor

Protein appears, low enough to be a supporting ingredient.

Water-binding (humectants) Moderate

Humectants in the working part of the formula.

Slip and detangling High

Conditioning agents sit high in the list — this is a detangling formula.

Needs detergent to remove No

Nothing here needs a detergent wash to remove.

Fragrance Prominent

Fragrance sits in the first eight ingredients — a larger share of the formula.

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. These 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 solvent The base everything else is dissolved in Neutral
Cetearyl Alcohol fatty alcohol Thickens and conditions — not a drying alcohol Softens
Paraffinum Liquidum/Mineral Oil oil Coats and softens the strand Softens
Orbignya Oleifera (Babassu) Seed OilOrbignya Oleifera Seed Oil oil Coats and softens the strand Softens
Dipalmitoylethyl Hydroxyethylmonium Methosulfate conditioning agent Conditions and softens — this is what makes it comb through Detangles
FragranceParfum fragrance The scent Fragrance
Cetyl Esters light ester A light, silky feel Softens
Cetrimonium Chloride conditioning agent Adds slip, lower in the list Detangles
Linalool fragrance The scent Fragrance
Citronellol fragrance The scent Fragrance
Geraniol fragrance The scent Fragrance
Hydroxypropyltrimonium Hydrolyzed Wheat Protein conditioning agent Adds slip, lower in the list Protein
What the list leaves out, and what it carriesThe list carries no sulfates, silicones, or drying alcohols. Fragrance is on the label. Heavier butters sit in the working part of the list.
Full ingredient list (29)

US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order. Annotations keep three readings separate: the ingredient's general function, its role in this product type, and what its position can support.

  • 1 Water · Aqua/Water
    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 Cetearyl Alcohol
    General function

    A waxy fatty alcohol - nothing like drying alcohol. It gives conditioners their body and leaves a soft, smoothing film on the hair.

    Leading ingredient

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

    May suitDry, coarse, or high-porosity hair

    The waxy solid that gives a conditioner its body. It deposits a soft lubricating layer, which is most of what makes hair feel smooth after rinsing.

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

    Deposits with the cationic conditioners and helps them lie flat along the strand, which is where the detangling actually comes from.

    DependsFine or easily flattened hair

    Near the top of a conditioner it is doing most of the conditioning, and most of the weighting, at the same time.

    PubChem
    • fatty alcohol
    • emollient
    • thickener
  • 3 Paraffinum Liquidum/Mineral Oil
    General function

    The oil pressed from Paraffinum Liquidum. How much weight a plant oil leaves depends on the hair it lands on; coarse hair tends to take more of it than fine hair.

    Leading ingredient

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

    • oil
    • emollient
  • 4 Orbignya Oleifera (Babassu) Seed Oil · Orbignya Oleifera Seed Oil
    General function

    Babassu oil - solid at cool temperatures, lighter than coconut oil in feel.

    Supporting ingredient

    Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

    May suitDry, coarse, or high-porosity hair

    Coats the surface and slows water leaving the strand, which is usually what coarse hair that dries out fast is missing.

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

    A thin oil layer lowers friction between strands and flattens the raised cuticle that scatters light and catches on its neighbours.

    May not suitFine or easily flattened hair

    Near the top of a list an oil is weight before it is anything else, and fine hair shows that first at the roots.

    • oil
    • emollient
  • 5 Dipalmitoylethyl Hydroxyethylmonium Methosulfate
    General function

    A biodegradable conditioning agent used for detangling in rich conditioners.

    Supporting ingredient

    Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

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

    A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.

    May suitVery dry or highly damaged hair

    The class that does the detangling in a conditioner. It deposits lubrication where the cuticle is worn.

    DependsBuild-up-sensitive routines

    Substantive by design. A routine with no detergent wash gives it nothing to leave with.

    PubChem
    • conditioning agent
  • Below about this point, order stops being meaningful — these are typically used at 1% or less.
  • 6 Fragrance · Parfum
    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
  • 7 Cetyl Esters
    General function

    A waxy ester blend that replaces spermaceti in creams. It thickens and leaves a smooth, non-greasy finish.

    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

    A light emollient: it softens the surface with noticeably less weight than an oil or a butter.

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

    Spreads thin and lowers friction between strands without the heaviness of a fixed oil.

    • light ester
    • emollient
    • thickener
  • 8 Cetrimonium Chloride
    General function

    A quick-acting conditioning agent that reduces static and combing force. It also helps keep the formula stable.

    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

    The C16 quat binds mostly by charge rather than by chain, so it deposits measurably less than the C22 ones. Less deposit is less conditioning and also less weight, which is usually the trade fine hair wants.

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

    A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.

    DependsBuild-up-sensitive routines

    Substantive by design. A routine with no detergent wash gives it nothing to leave with.

    International Journal of Cosmetic Science
    • conditioning agent
    • cleanser
  • 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 Linalool
    General function

    A floral fragrance component listed separately as a recognised contact allergen.

    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
  • 11 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
  • 12 2-Oleamido-1,3-Octadecanediol
    General function

    A ceramide-like lipid used to reinforce the outer surface of damaged hair.

    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 suitFrizz-prone, damaged, or high-friction hair

    Restoring surface lipids lowers friction between strands, which is where much of the roughness in damaged hair comes from.

    May suitProtein-sensitive hair

    A lipid, not a protein, despite sitting alongside proteins in most repair claims. It does not carry the stiffening effect.

    May suitVery dry or highly damaged hair

    Ceramides are the lipid class bleaching and heat deplete. Replacing them works on the surface layer rather than adding protein stiffness.

    • ceramide
    • emollient
  • 13 Citronellol
    General function

    A rose-like fragrance component named separately as a recognised allergen.

    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
  • 14 BHT
    • antioxidant
  • 15 Glycine
    General function

    The smallest amino acid in hair protein, added for moisture binding.

    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

    Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.

    DependsProtein-sensitive hair

    The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.

    PubChem
    • amino acid
  • 16 Arginine
    General function

    An amino acid that holds water and carries a positive charge, so it is drawn to damaged spots on the strand.

    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

    Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.

    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.

    DependsProtein-sensitive hair

    The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.

    PubChem
    • amino acid
    • humectant
  • 17 Proline
    General function

    An amino acid from hair protein, used in amino-acid conditioning blends.

    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

    Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.

    DependsProtein-sensitive hair

    The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.

    • amino acid
  • 18 Tyrosine
    General function

    An amino acid found in hair protein, used in conditioning blends.

    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

    Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.

    DependsProtein-sensitive hair

    The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.

    • amino acid
  • 19 Glutamic Acid
    General function

    An amino acid used for moisture binding and to bring the formula to an acidic pH.

    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

    Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.

    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.

    DependsProtein-sensitive hair

    The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.

    PubChem
    • amino acid
    • pH adjuster
  • 20 Geraniol
    General function

    A rose-scented fragrance component, listed on its own 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.

    • fragrance
    • named fragrance allergen
  • 21 Serine
    General function

    One of the amino acids that make up hair protein, added for water binding.

    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

    Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.

    DependsProtein-sensitive hair

    The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.

    • amino acid
  • 22 Hydroxypropyltrimonium Hydrolyzed Wheat Protein
    General function

    A wheat protein given a positive charge so it sticks to damaged areas. It conditions and adds temporary strength in one ingredient.

    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 suitFrizz-prone, damaged, or high-friction hair

    A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.

    May suitMaximum-hold styling

    Film formers are what hold a style: they dry into a connected film across the strands so the shape resists movement.

    May suitVery dry or highly damaged hair

    Hydrolysed fragments are small enough to sit in the gaps of a worn cuticle for a wash or two, temporarily restoring stiffness and cutting breakage in combing.

    • conditioning agent
    • film former
    • protein
    • hydrolysed protein
  • 23 Benzyl Alcohol
    • preservative
    • solvent
  • 24 Safflower Glucoside
    • nonionic cleanser
    • cleanser
  • 25 Isoeugenol
    General function

    A spicy floral fragrance component named separately as a recognised allergen.

    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.

    • fragrance
    • named fragrance allergen
  • 26 Glycerin
    General function

    A small water-loving molecule that draws moisture into the hair and holds it there. It is the most common softening ingredient in conditioners and leave-ins.

    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
  • 27 Trehalose
    General function

    A sugar that holds water unusually well, used for lasting moisture without stickiness.

    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
  • 28 Tamarindus Indica Seed Polysaccharide
    • botanical extract
  • 29 Myrothamnus Flabellifolia Leaf Extract
    • botanical extract

What the whole list adds up to

  • 6 amino acids
  • 5 emollients
  • 5 fragrances
  • 4 humectants
  • 4 named fragrance allergens
  • 3 conditioning agents
  • 2 solvents
  • 2 thickeners
  • 2 oils
  • 2 cleansers
  • 2 preservatives
  • 2 pH adjusters
  • 2 botanical extracts
  • 1 fatty alcohol

Ingredient list captured 2026-08-25. Formulas change — check the package in your hand when an ingredient matters to you.

Price · 6.76 oz

Commonly seen $60–68 Midpoint $68 · 5 stores · checked Aug 30
Good value under $20 Under $3.03/oz it costs less than three-quarters of the 7 products we score as doing the same job

Priced above the products that do the same job. Stores sell it above the $20 line; products that do this job typically go for about $37 at this size.

Sizes

6.76 ozmost listed
$60–68
$10.06/oz
16.9 oz
$130
$7.69/oz

The 16.9 oz costs 24% less per ounce than the 6.76 oz.

Show the price ladder
Where we’ve seen it7 listings · 7 stores

6.76 ozmost listed

  • Walmart
    $54.55
    6.8 oz · $8.02/oz
    Aug 30Lowest per ozSale · was $68.00
  • Gilt.com
    $59.99
    6.8 oz · $8.82/oz
    Aug 30Sale · was $68.00
  • Kohl's
    $68.00
    6.76 oz · $10.06/oz
    Aug 30
  • Kerastase US
    $68.00
    6.76 oz · $10.06/oz
    Aug 25
  • Sephora
    $68.00
    6.76 oz · $10.06/oz
    Aug 30
  • Kerastase
    $68.00
    6.76 oz · $10.06/oz
    Aug 30

16.9 ozBest per ounce

  • Target
    $130.00
    16.9 oz · $7.69/oz
    Aug 30Lowest per oz

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. 6.76 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 6.76 oz at recognised stores — the cheapest quarter and the dearest quarter are left out, so one sale or one overpriced listing can’t move it.
  3. Good value under $20 comes from the 7 products we score as doing the same job as this one. A quarter of them cost less than $3.03/oz; at 6.76 oz that is $20. Under that line you are paying less than most of them.
  4. Each size is guarded on its own, so a multipack or a marketplace listing at one size cannot move another.
  5. About $37 is what those same products typically cost at this size — the midpoint of their prices per ounce, scaled to 6.76 oz.

Formula

Formula score
8 of 10

Sold through salons at a price 4 products that do the same job undercut — the distribution is part of what you are paying for.

How the score is counted
  • 4 products that do the same job cost less per ounce
  • Costs more per ounce than 92% of the 341 masks and treatments we’ve priced
  • Covers 4 of the 6 things a treatment should do
  • Reviewers mention 3 things they like about how it performs
  • Rich emollientsThe depth a treatment step is built around.3 pts
  • Conditioning agents up frontWhat makes wet hair comb through.2 pts
  • Protein or amino acidsThe strengthening side of a treatment.2 pts
  • A humectantBinds water into the hair.1 pt
  • A stated dwell timeThe brand says how long to leave it on.1 pt
  • Fragrance kept out of the top eightScent as a finishing touch, not a major share.1 pt

The formula score is completeness for the job: the share of the systems this product type is normally built around that we can find in this list, weighted. It is not efficacy, not quality, and it never compares across product types.

Does the same job, for less

Same derived functions — what it cleans, conditions, coats or holds — at a lower cost per ounce. Scent, texture and where you buy it can still differ.

Camille RoseLowest cost per oz Strength Restorative Deep Conditioner $1.93/oz $8.13/oz less
  • Budget
· Close function
Differs
  • Drugstore tier
  • 8 oz bottle
Compare
RedkenClose function Acidic Color Gloss Gloss-in-Mask For Shine & Hydration $5.41/oz $4.65/oz less
Function
  • Water-binding (humectants)
Also
  • 8.5 oz bottle
  • Sold online
Compare
Camille RoseClose function Buritti Nectar Repair Cholesterol Treatment $4.00/oz $6.06/oz less
Function
  • Water-binding (humectants)
Also
  • Masstige tier
  • 4 oz bottle
Compare

See more alternatives in the product library

These are functional neighbours, not personal recommendations — they are close on formula, not chosen for anyone. Get the one that fits your hair, routine, and budget

Built for curly to coily hair

Final decision

Should you buy it?

Good for the right person, not the lowest cost
Best user

People who want maximum slip — for real detangling slip and a curly-method-compatible formula

Biggest tradeoff

Less suited to anyone sensitive to fragrance, oily scalps and fine hair, or vegan and cruelty-free shopping

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, against what the formula shows

Claims are quoted from the brand. We only mark one supported, partly supported, or conflicting when the ingredient list actually speaks to it; everything else stays "stated by the brand", which is not a criticism — most claims simply cannot be read off a label.

1
SupportedBacked by ingredients
1
Partly supportedSome supporting logic
2
Stated by brandNo clear evidence
0
Potential conflictFormula works against claim
rebuilds internal hair structure via FIBRA-KAP complex to compensate for lost Keratin Associated Proteins

A protein or amino acid appears in the ingredient list.

  • Glycine
  • Arginine
  • Proline
Supported

The named ingredient is really there.

contains Resurrection Sap (Seve de Resurrection) for regenerative effect

This is a marketing claim; an ingredient list cannot speak to it.

Stated by brand

Can’t be confirmed from label.

restores fiber elasticity and tone

This is a marketing claim; an ingredient list cannot speak to it.

Stated by brand

Can’t be confirmed from label.

acts as intensive bandage repair for compromised lengths and ends

Protein or ceramides are present, but low enough that this reads as support, not treatment.

  • Dipalmitoylethyl Hydroxyethylmonium Methosulfate
  • Cetrimonium Chloride
  • 2-Oleamido-1,3-Octadecanediol
Partly supported

Supports the surface, not a treatment.

How to read this

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

Reviewers

What people report

Recurring themes our researchers wrote in their own words from sourced reviews. We do not store or scrape star ratings.

Leaves damaged hair softer, stronger and more hydrated

Official US exact 200 ml product review corpus (679 reviews)

Revives bleached or overprocessed hair and can improve it after one use

Official US exact 200 ml product review corpus (679 reviews)

Improves detangling and manageability while smoothing and adding shine

Official US exact 200 ml product review corpus (679 reviews)

Some reviewers find the salon-like fragrance too strong or report dry/tangled ends

Official US exact 200 ml product review corpus (679 reviews)

More from Kerastase

How this page was made

  • Everything above is generated from our researched product record — identity, the ingredient list as printed, the brand's own claims, dated price observations, and review themes written in our researchers' own words. No part of this page is written per 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 (3 manufacturer or regulatory, 2 retailer, 0 editorial), last checked 2026-08-25.
  • Ingredient references are linked for 12 of 22 product-aware annotations on this page. Fit notes are conditional formulation guidance, not a conclusion about the finished product or about you.
  • We have not tested this product in a lab and we do not physically test your hair. Formula readings come from the ingredient list; behaviour claims are labelled as the brand's.
  • Ingredient order tells you relative amount only above roughly 1%. Prices are observations on the dates shown and change without notice.
  • 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 v22. Record last updated 2026-08-25.