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Christophe Robin · Fortifying

Fortifying Shampoo with Amaranth Peptides

Shampoo / Everyday cleanser, balanced

Shampoo
Sulfate-free
Silicone-free
Curly-method

Size8.4 fl oz

Price$41seen at one store · 8.4 oz

Price / oz$4.88/ozat 8.4 oz

Where to buy2 stores · $41.00–41.00

Scent:

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

Listing used for research: dermstore.com

Personal fit

Is this right for you?

Factor Your profile Fit

Best for hair types All types Not in your profile

Moisture level Low Not in your profile

Cleansing strength Moderate Not in your profile

Slip / detangling Moderate Not in your profile

Weight on hair Light Not in your profile

Fragrance Present Not in your profile

Protein Prominent Not in your profile

Silicone / wax buildup None Not in your profile

Clarifying wash needed Low Not in your profile

Sulfates None listed Not in your profile

Show all 22 factors we check

The rest of what your plan weighs on this product.

Parabens / preservatives None of these listed Not in your profile

Essential oils None listed Not in your profile

Fast-drying alcohol None Not in your profile

Vegan / cruelty-free Not yet verified Not in your profile

Animal-derived ingredients Not yet verified Not in your profile

Heavy humectants Not heavy Not in your profile

Hard-water defence High Not in your profile

UV filter None listed Not in your profile

pH adjusted Adjusted Not in your profile

Ingredient list 28 ingredientsAbout average Not in your profile

Price tier Prestige Not in your profile

Where to buy it Specialty beauty · Brand website Not in your profile

The consultation builds your hair profile, then reads every factor in this table against it — and tells you where this product fits, or what to use instead.

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$49.00 once, for your consultation and hair profile. No subscription, no required purchases.

Same job for less elsewhere

$4.88/oz at 8.4 oz — more than 94% of the 817 shampoos , which mostly run $0.81–3.01/oz.

View alternatives

Great for

Colour-treated hairthat fades faster in a sulfate wash

Protein-hungry hairthat stretches and stays stretched when wet

Curly-method routinesno sulfates and no water-insoluble silicones

Hard waterand swimmers dealing with mineral deposit

Fine hairthat flattens under most products

Silicone-free routinesno silicones appear in the list

Maybe skip if

this product carries a scent

Protein-sensitive hairthat goes stiff or straw-like on protein

Tight budgetsit sits in the upper price tiers

Whether this much cleansing is right for you depends on how fast your scalp oils, how much product you layer, and your water — 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.

Cleansing strength Moderate

Removes oil and product; leaves some conditioning behind.

Expected lather Moderate

An ordinary shampoo lather.

Slip and detangling Moderate

Conditioning agents are present, lower in the list.

Water-binding (humectants) Low

Humectants appear, but low enough to be a minor part.

Scalp active None

No over-the-counter scalp active.

Hard-water defence Chelators present

Chelators are present — they bind hard-water and pool minerals.

Needs detergent to remove No

Nothing here needs a detergent wash to remove.

Protein Prominent

Protein high in the list — a strengthening formula, not a moisture one.

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. 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/Eau	solvent	The base everything else is dissolved in	Neutral
Cocamidopropyl Betaine	amphoteric cleanser	—	Cleanses
Sodium Lauroyl Sarcosinate	mild anionic cleanser	—	Cleanses
Pisum Sativum (Pea) Peptide	protein	Firms up soft, over-stretchy hair	Protein
Sodium Chloride	salt	Thickens the formula	Stabilizes
Phenoxyethanol	preservative	Keeps the product from spoiling	Stabilizes
Acrylates/C10-30 Alkyl Acrylate Crosspolymer	thickener	Adjusts the texture	Holds
Sodium Benzoate	preservative	Keeps the product from spoiling	Stabilizes
FragranceFragrance (Parfum)	fragrance	The scent	Fragrance
Hydrolyzed Rice Protein	film former	A supporting film former	Protein
Hydrolyzed Lupine Protein	film former	A supporting film former	Protein

What the list leaves out, and what it carriesThe list carries no sulfates, silicones, or drying alcohols. Protein sits high: this is a strengthening step rather than a moisture one. Fragrance is on the label. Hard-water chelators are present.

Full ingredient list (28)

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/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 Cocamidopropyl Betaine

General function
A mild coconut-derived co-cleanser that boosts foam and softens the effect of stronger detergents. It appears in most shampoos, gentle or not.

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

May suitDry, coarse, or high-porosity hair
Mild cleansing leaves more surface lubrication in place on hair that dries out quickly.

May not suitBuild-up-sensitive routines
The mildest detergents are also the least complete: a routine that deposits films needs something stronger periodically.

DependsVery dry or highly damaged hair
Among the mildest detergents in use — it is what baby shampoos are built on — but it is almost always the second detergent in a formula. How much a wash strips is still decided by the primary detergent listed above it.

Indian Journal of Dermatology
- amphoteric cleanser
- secondary cleanser
- cleanser
3 Sodium Lauroyl Sarcosinate

General function
A gentle cleanser that leaves a soft after-feel; often paired with stronger detergents.

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

May suitCurls or waves needing flexible hold
The detergent class most curl routines are built around: it lathers and cleanses without stripping the strand back to bare.

May suitDry, coarse, or high-porosity hair
A gentler detergent leaves more of the surface oil that slows water loss from coarse or porous hair.

May suitVery dry or highly damaged hair
Cleanses with less sebum removal than a sulfate detergent, so hair that is short of moisture keeps more of it through the wash.

PubChem
- mild anionic cleanser
- cleanser
4 Pisum Sativum (Pea) Peptide

General function
A short-chain pea protein used for strength and body claims in vegan formulas.

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

May not suitProtein-sensitive hair
A large surface-depositing protein. If protein reliably makes your hair feel rigid, this is the form most likely to do it.

DependsVery dry or highly damaged hair
Unhydrolysed protein is too large to enter the strand. It sits on the surface, which is a coating effect rather than internal reinforcement.
- protein
5 Sodium Chloride

General function
Table salt. In shampoo it is used to thicken the liquid, not to treat the hair.

Supporting ingredient
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
PubChem
- salt
- thickener
▾Below about this point, order stops being meaningful — these are typically used at 1% or less.
6 Phenoxyethanol

General function
The most common modern preservative; it keeps the product free of bacteria and mould. It sits well below 1% of the formula.

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.
PubChem
- preservative
7 Acrylates/C10-30 Alkyl Acrylate Crosspolymer

General function
A gel-forming thickener that also keeps oils suspended. It contributes a little hold.

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 suitClimate-sensitive or frizz-prone hair
A set polymer film is a physical barrier to humidity, so a style keeps its shape longer in damp conditions.

May suitMaximum-hold styling
Synthetic film formers dry into a continuous film, which is what holds a shape against movement and against humid air.

DependsBuild-up-sensitive routines
Some acrylate copolymers rinse with water and some need a detergent; the label alone does not say which one a formula used.
- thickener
- polymer
- film former
8 Sodium Benzoate

General function
A food-grade preservative that works only in acidic formulas, which is why it usually appears alongside citric 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.
PubChem
- preservative
9 Fragrance · 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
10 Polyquaternium-10

General function
A cellulose-based conditioning polymer that leaves a thin, static-reducing film. Very common in shampoos as the ingredient that keeps them from stripping.

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 suitCurls or waves needing flexible hold
Cationic polymers hold a curl loosely and stay soft, which is why they turn up in definition products rather than firm-hold ones.

May suitFrizz-prone, damaged, or high-friction hair
A cationic polymer stays on the hair through rinsing, which is what keeps static and combing friction down after the wash.

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.
- conditioning agent
- film former
- polymer
11 Guar Hydroxypropyltrimonium Chloride

General function
A conditioning polymer made from guar bean gum. It deposits during rinsing, which is why sulfate shampoos can still leave hair soft.

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 suitCurls or waves needing flexible hold
Gums thicken and set soft, which gives definition that bends rather than a rigid cast.

May suitFrizz-prone, damaged, or high-friction hair
Cationic conditioners bind to the negatively charged damaged cuticle, laying it flat and cutting the friction that causes combing breakage.

May suitMaximum-hold styling
A styling polymer dries into a film across the strands, which is what makes a shape hold instead of relax.
- conditioning agent
- polymer
- gum
12 Hydrolyzed Rice Protein

General function
A light plant protein that adds body and shine, popular in volume products.

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
Filling surface gaps evens out the cuticle, which is part of what makes damaged hair comb and reflect light more like undamaged hair.

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.
- film former
- protein
- hydrolysed protein
13 Hydrolyzed Lupine Protein

General function
A protein broken into fragments small enough to cling to the hair. It fills gaps on damaged strands and firms the feel for a few washes; too much reads as stiff.

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
Filling surface gaps evens out the cuticle, which is part of what makes damaged hair comb and reflect light more like undamaged hair.

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.
- film former
- protein
- hydrolysed protein
14 Disodium EDTA

General function
Grabs metal ions from hard water so they cannot dull the hair or destabilise the formula.

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
15 Amaranthus Caudatus Seed Extract
- botanical extract
16 Ethylhexylglycerin

General function
A preservative booster that also adds a little softness. Almost always paired with phenoxyethanol.

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
Emollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.

PubChem
- preservative
- emollient
17 Rubus Idaeus (Raspberry) Seed Oil

General function
The oil pressed from Raspberry (Rubus Idaeus). 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.

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
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.
- oil
- emollient
18 Leuconostoc/Radish Root Ferment Filtrate
- preservative
19 1,2-Hexanediol

General function
A preservative booster that also holds a little moisture and helps other ingredients dissolve.

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 hydrates without contributing weight.

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
- preservative
- humectant
- solvent
20 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
21 Caramel

General function
A colour added to tint the product itself. It does not colour 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 suitGray, silver, or brass-prone hair
A violet or blue colorant sits opposite yellow on the colour wheel, so a trace of it deposited on the surface makes a warm cast read cooler. It washes out over the following few washes.
- colourant
22 Benzyl Alcohol
- preservative
- solvent
23 Benzoic Acid
- preservative
24 Potassium Sorbate
- preservative
25 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
26 Bixa Orellana Seed Extract
- botanical extract
27 Potassium Hydroxide

General function
A strong base used in trace amounts to set pH; it is 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
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
- pH adjuster
28 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

What the whole list adds up to

9 preservatives
4 film formers
3 solvents
3 proteins
3 polymers
3 pH adjusters
2 cleansers
2 thickeners
2 conditioning agents
2 hydrolysed proteins
2 hard-water chelators
2 botanical extracts
2 emollients
2 humectants

Ingredient list captured 2026-08-22. Formulas change — check the package in your hand when an ingredient matters to you.

Price · 8.4 oz

Seen at $41 1 store · checked Aug 22

Good value under $14 Under $1.62/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 $14 line; products that do this job typically go for about $18 at this size.

Show the price ladder

Price for 8.4 ozlower is better

Where we’ve seen it2 listings · 2 stores

Bluemercury
$41.00

8.4 oz · $4.88/oz

Aug 22Lowest per oz
Dermstore
$41.00

8.4 oz · $4.88/oz

Aug 22

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

8.4 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.
Seen at $41 is the price we have observed for the 8.4 oz. We need three stores before we call a price commonly seen.
Good value under $14 comes from the 7 products we score as doing the same job as this one. A quarter of them cost less than $1.62/oz; at 8.4 oz that is $14. Under that line you are paying less than most of them.
About $18 is what those same products typically cost at this size — the midpoint of their prices per ounce, scaled to 8.4 oz.

Formula

Formula score

10 of 10

Sold through specialty beauty at a price 5 products that do the same job undercut — the counter is part of what you are paying for.

How the score is counted

5 products that do the same job cost less per ounce
Costs more per ounce than 94% of the 817 shampoos we’ve priced
Covers 7 of the 7 things a shampoo should do
Reviewers mention 2 recurring complaints

A working detergent systemWhat actually removes oil and product.3 pts
Slip for detanglingReduces the force it takes to comb wet hair.2 pts
A humectantBinds water into the hair.1 pt
A hard-water chelatorBinds the minerals that dull hair in hard water.1 pt
A pH adjusterBrings the formula to the acidic pH hair prefers.1 pt
No detergent-dependent filmNothing that needs a clarifying wash to remove.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.

Pura d'orLowest cost per oz Apple Cider Vinegar Thin2Thick Clarifying and Detoxing Shampoo $1.00/oz $3.88/oz less

Protein
Vegan & CF
Widely sold

· Close function

Function: Water-binding (humectants)
Film formers
Also: Cruelty-free
Vegan
Masstige tier

Compare

Rizos CurlsClose function Biotin Shampoo $2.20/oz $2.68/oz less

Sulfate-free
Protein
Curly method

Function: Water-binding (humectants)
Oils and butters
Film formers
Also: Cruelty-free
Masstige tier
10 oz bottle

Compare

MoroccanoilClose function Hydrating Shampoo $3.06/oz $1.82/oz less

Sulfate-free
Protein-free
Curly method

Function: Water-binding (humectants)
Protein
Also: Cruelty-free
8.5 oz bottle
Sold through salons

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

Final decision

Should you buy it?

Good for the right person, not the lowest cost

Best user

Colour-treated hair — for washing without sulfates and protein high in the formula

Biggest tradeoff

Not ideal for anyone sensitive to fragrance, hair that stiffens on protein, or people shopping on a budget

Best alternative if not

Pura d'or Apple Cider Vinegar Thin2Thick Clarifying and Detoxing 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

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.

SupportedBacked by ingredients

Partly supportedSome supporting logic

Stated by brandNo clear evidence

Potential conflictFormula works against claim

Reduces hair breakage by up to five times

Protein sits in the first eight ingredients.

Pisum Sativum (Pea) Peptide
Polyquaternium-10
Guar Hydroxypropyltrimonium Chloride

Supported

Reinforces a damaged strand.

Helps to minimize shedding

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

—

Stated by brand

Can’t be confirmed from label.

Leaves hair visibly stronger, resilient, and fuller

Protein sits in the first eight ingredients.

Pisum Sativum (Pea) Peptide
Polyquaternium-10
Guar Hydroxypropyltrimonium Chloride

Supported

Reinforces a damaged strand.

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.

Reviewers with fine or breakage-prone hair report noticeably less shedding and fuller-feeling hair after using the shampoo as part of the fortifying routine

fine/thin, breakage-prone hair

Some reviewers find the shampoo requires more product per wash than other brands and does not lather heavily

general users comparing to other shampoos

A subset of reviewers felt underwhelmed for the price point, saying results were minimal compared to other prestige shampoos

price-conscious reviewers

Many reviewers evaluate the shampoo jointly with the matching Fortifying Conditioner as a routine rather than reviewing the shampoo alone

reviewers using shampoo+conditioner together

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.
4 sources consulted for this product (0 manufacturer or regulatory, 4 retailer, 0 editorial), last checked 2026-08-25.
Ingredient references are linked for 9 of 18 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.

Fortifying Shampoo with Amaranth Peptides

Is this right for you?

Read from the label, not the marketing

The ingredients that change a decision

What the whole list adds up to

Should you buy it?

What the brand says, against what the formula shows

What people report

More from Christophe Robin

How this page was made

Your personalized hair plan