Smooths hair, reduces frizz
Silicones or film formers smooth the cuticle, which is the usual mechanism.
- Amodimethicone
- Dimethicone
- Polyquaternium-6
Smoother strands, less frizz.
Shampoo / Clarifying, deep-cleaning
Scent:
The ingredient list declares fragrance. What it smells of is not stated, and we do not guess.
Manufacturer page: kerastase.com
Personal fit
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Your avoid-list
Same job for less elsewhere
$6.00/oz at 8.5 oz — more than 98% of the 817 shampoos , which mostly run $0.81–3.01/oz.
Great for
Maybe skip if
What the formula actually does
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.
Removes oil, buildup, and most residue — a reset wash.
Thick foam that spreads quickly through the hair.
Conditioning agents are present, lower in the list.
Humectants near the top — water-binding is a headline mechanism here.
No over-the-counter scalp active.
No chelating agent in the list.
Water-insoluble silicones or waxes: a detergent wash is what removes them.
Protein appears, low enough to be a supporting ingredient.
Fragrance is listed; it sits below the working ingredients.
Ingredients that matter
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.
| Ingredient | What it does | Why it matters | Chip |
|---|---|---|---|
| WaterAqua/Water | solvent | The base everything else is dissolved in | Neutral |
| Sodium Laureth Sulfate | sulfate cleanser | — | Cleanses |
| Coco-Betaine | amphoteric cleanser | — | Cleanses |
| Glycerin | humectant | Pulls water into the hair | Moisturizes |
| Glycol Distearate | opacifier | Makes the product look creamy | Softens |
| Sodium Chloride | salt | Thickens the formula | Stabilizes |
| Amodimethicone | silicone | Smooths the cuticle and adds shine | Buildup |
| PPG-5-Ceteth-20 | emulsifier | Keeps oil and water mixed | Stabilizes |
| Dimethicone | silicone | A little smoothing and shine | Buildup |
| Salicylic Acid | active | A secondary active | Active |
| Benzyl Salicylate | fragrance | The scent | Fragrance |
| Hydroxypropyltrimonium Hydrolyzed Wheat Protein | conditioning agent | A little conditioning left behind | Protein |
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.
The base of almost every rinse-off and cream hair product. It carries everything else and is normally the first ingredient on the label.
Listed in the first three ingredients, it is likely a structural part of this formula.
A strong, high-foaming cleanser and the most common shampoo detergent. It removes oil and product efficiently, which can be more than dry or colour-treated hair wants.
Listed in the first three ingredients, it is likely a structural part of this formula.
A sulfate detergent removes deposited silicone, wax and styling films in one wash, which is what resets a routine before build-up is visible.
Fine hair that goes limp under conditioning films usually reads a full detergent wash as volume returning.
Coarse and high-porosity hair loses water quickly on its own; an efficient detergent removes the surface oils that were slowing that down.
A coconut-derived mild cleanser that boosts foam and softens stronger detergents.
Listed in the first three ingredients, it is likely a structural part of this formula.
Mild cleansing leaves more surface lubrication in place on hair that dries out quickly.
One of the mildest detergent classes. It is usually there to let a formula lather without a harsher detergent doing the work.
The mildest detergents are also the least complete: a routine that deposits films needs something stronger periodically.
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.
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
High-porosity hair loses water fast; a humectant holds some of it in place for longer than the wash itself would.
Binds water into the outer layers of the strand, and water is what makes dry hair flexible again rather than brittle.
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.
A wax that gives shampoo its pearly look and a slightly richer feel.
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
Emollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.
Table salt. In shampoo it is used to thicken the liquid, not to treat the hair.
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
A silicone modified to stick where hair is damaged, so it smooths selectively instead of coating everything. It resists rinsing more than plain dimethicone.
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
A surface film slows how quickly humidity reaches the cortex, which is what limits swelling-driven frizz in damp air.
Amino-functional silicone carries a positive charge, so it binds where the cuticle is worn rather than coating evenly. Damaged areas get most of it.
Film formers are what hold a style: they dry into a connected film across the strands so the shape resists movement.
A solubiliser that keeps oils and fragrance dissolved in clear liquids.
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
The most common conditioning silicone. It coats the strand for shine, slip, and frizz control, and needs a detergent (not just water) to wash out.
Lower in the ordered portion of the list, it is more likely playing a supporting role than defining the formula.
A surface film slows how quickly humidity reaches the cortex, which is what limits swelling-driven frizz in damp air.
Lays a smooth film along the cuticle, which lowers combing friction and flattens the surface irregularities that read as frizz.
Dimethicone does not disperse in water. On a routine that skips detergent it stays on the hair and accumulates wash after wash.
A conditioning polymer used for detangling and light hold.
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
Cationic polymers hold a curl loosely and stay soft, which is why they turn up in definition products rather than firm-hold ones.
A cationic polymer stays on the hair through rinsing, which is what keeps static and combing friction down after the wash.
Film formers are what hold a style: they dry into a connected film across the strands so the shape resists movement.
A thickener that turns a liquid into a clear gel. It also contributes a light hold.
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
A set polymer film is a physical barrier to humidity, so a style keeps its shape longer in damp conditions.
Synthetic film formers dry into a continuous film, which is what holds a shape against movement and against humid air.
Some acrylate copolymers rinse with water and some need a detergent; the label alone does not say which one a formula used.
An amino acid that holds water and carries a positive charge, so it is drawn to damaged spots on the strand.
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.
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.
The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.
An amino acid used for moisture binding and to bring the formula to an acidic pH.
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.
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.
The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.
A soft floral fragrance component listed separately as a recognised allergen.
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
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.
One of the amino acids that make up hair protein, added for water binding.
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.
The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.
A wheat protein given a positive charge so it sticks to damaged areas. It conditions and adds temporary strength in one ingredient.
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.
Film formers are what hold a style: they dry into a connected film across the strands so the shape resists movement.
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.
A ceramide-like lipid used to reinforce the outer surface of damaged hair.
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
Restoring surface lipids lowers friction between strands, which is where much of the roughness in damaged hair comes from.
A lipid, not a protein, despite sitting alongside proteins in most repair claims. It does not carry the stiffening effect.
Ceramides are the lipid class bleaching and heat deplete. Replacing them works on the surface layer rather than adding protein stiffness.
A quick-acting conditioning agent that reduces static and combing force. It also helps keep the formula stable.
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
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.
A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.
Substantive by design. A routine with no detergent wash gives it nothing to leave with.
A floral fragrance component listed separately as a recognised contact allergen.
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
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.
A violet-like fragrance component named separately as a recognised allergen.
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
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.
A strong base used in trace amounts to raise pH; fully neutralised in the finished product.
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
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.
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.
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
Holds hard-water minerals in solution so they rinse away instead of depositing on the 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.
Where a warm cast comes from water minerals rather than from the hair itself, holding those metals in solution is what removes it.
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.
It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.
Declared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.
Ingredient list captured 2026-08-24. Formulas change — check the package in your hand when an ingredient matters to you.
Price · 8.5 oz
Priced above the products that do the same job. Stores sell it above the $3 line; products that do this job typically go for about $13 at this size.
Formula
Sold through salons at a price 6 products that do the same job undercut — the distribution is part of what you are paying for.
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.
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



Final decision
Scalps that oil up within a day who want a proper reset wash and moisture that stays in
Not ideal for anyone sensitive to fragrance, sulfate-free routines and fresh keratin treatments, or curly-method routines
Biolage Strength Recovery Shampoo — for similar results 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
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.
Smooths hair, reduces frizz
Silicones or film formers smooth the cuticle, which is the usual mechanism.
Smoother strands, less frizz.
Leaves hair sleek, shiny and manageable without weighing it down
Conditioning agents are present, but low in the list.
A little slip, not a lot.
Contains cationic polymer and Research Ceramide for fluidity
This is a marketing claim; an ingredient list cannot speak to it.
—
Can’t be confirmed from label.
Protects against humidity for up to 72 hours
Silicones or film formers smooth the cuticle, which is the usual mechanism.
Smoother strands, less frizz.
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
Recurring themes our researchers wrote in their own words from sourced reviews. We do not store or scrape star ratings.
Multiple reviewers, including several who note the review "was collected as part of a promotion," describe noticeably softer, more nourished hair after one use
incentivized and organic reviewersReviewers consistently praise reduced frizz and smoother, shinier hair after use, including some who use it after keratin treatments
frizz-prone/post-keratin reviewersA few reviewers mention noticeable hair shedding/fall during washing despite otherwise being satisfied
long-term usersA minority of reviewers report mixed results, calling the smoothing effect underwhelming for their hair type despite liking the scent
first-time triers