Ouai Anti-Dandruff Hair Shampoo — 10 oz container

Ouai

Anti-Dandruff Hair Shampoo

Shampoo / Clarifying, deep-cleaning

Shampoo
Sulfate-free
Protein-free
Moisture-rich
Cruelty-free · brand states

Size10.14 fl oz (300 ml)

Price$38–44commonly seen · 10.14 oz

Price / oz$4.09/ozat 10.14 oz

Where to buy8 stores · $38.00–50.00

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: theouai.com

Personal fit

Is this right for you?

Factor Your profile Fit

Best for hair types All types Not in your profile

Moisture level High Not in your profile

Cleansing strength Strong 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 None Not in your profile

Silicone / wax buildup High Not in your profile

Clarifying wash needed Moderate 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 Cruelty-free · brand states Not in your profile

Animal-derived ingredients Not yet verified Not in your profile

Heavy humectants 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 24 ingredientsAbout average Not in your profile

Price tier Masstige Not in your profile

Where to buy it Brand websiteOne channel Not in your profile

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

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$49 once, with 60 days of follow-up questions and plan updates. Nothing renews, and you never have to buy a product.

Priced above most shampoos

$4.09/oz at 10.14 oz, more than 86% of the 1544 shampoos , which mostly run $0.79–3.04/oz.

Price and stores

Great for

Flaking scalpsit has an over-the-counter active

Colour-treated hairthat fades faster in a sulfate wash

Protein-sensitive hairthat stiffens when protein is added

Fast-oiling scalpsthat need a real reset wash

Dry, thirsty hairhumectants and emollients both sit up front

Hard waterand swimmers dealing with mineral deposit

Maybe skip if

this product has a scent

Curly-method routinesthese silicones need a detergent to remove

Dry or damaged haira strong detergent system strips as it cleans

Hair that needs proteinthere is none in this list

Dry or very humid airwhere heavy humectants work against you

Non-medicated routinesthis is an over-the-counter drug as well as a cosmetic

How much cleansing you need depends on how fast your scalp gets oily, how much product you layer and your water. The consultation works that 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 Strong

A reset wash that removes oil, buildup, and most residue.

Expected lather High

Thick foam that spreads quickly through the hair.

Slip and detangling Moderate

Conditioning agents are present, lower in the list.

Water-binding (humectants) High

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

Scalp active salicylic acid, 2%

Carries an over-the-counter scalp active, listed under Drug Facts.

Hard-water defence Chelators present

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

Needs detergent to remove Yes

Water-insoluble silicones or waxes: a detergent wash is what removes them.

Protein None

No protein or amino acids in the list.

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.

Ingredient	What it does	Why it matters	Chip
Water	solvent	The base everything else is dissolved in	Neutral
Cocamidopropyl Betaine	amphoteric cleanser	—	Cleanses
Sodium C14-16 Olefin Sulfonate	olefin sulfonate cleanser	—	Cleanses
Glycerin	humectant	Pulls water into the hair	Moisturizes
Sodium Lauroyl Methyl Isethionate	mild anionic cleanser	—	Cleanses
Polysorbate 80	emulsifier	Keeps oil and water mixed	Stabilizes
Acrylates Copolymer	film former	Lays down the film that holds a shape	Holds
Propanediol Caprylate	light ester	Light slip without much weight	Softens
Silicone Quaternium-22	silicone	A little smoothing and shine	Buildup
Fragrance	fragrance	The scent	Fragrance

What the list leaves out, and what it carriesThe list carries no sulfates or drying alcohols. No protein: a moisture formula, not a repair one. Fragrance is on the label. Water-insoluble silicones that need a detergent wash to remove.

Full ingredient list (24)

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

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 C14-16 Olefin Sulfonate

General function
A strong non-sulfate detergent used in "sulfate-free" shampoos. It cleans about as thoroughly as a sulfate despite the label difference.

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

May suitBuild-up-sensitive routines
A strong detergent with no sulfate on the label. It removes deposited films about as completely as a sulfate does.

May not suitVery dry or highly damaged hair
Sulfate-free on the label is a naming fact, not a mildness one: this is an efficient detergent, and hair short of moisture can feel it.

PubChem
- olefin sulfonate cleanser
- cleanser
4 Glycerin

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

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
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
5 Sodium Lauroyl Methyl Isethionate

General function
A gentle, dense-lathering cleanser used as the primary detergent in many sulfate-free shampoos.

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

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.
- mild anionic cleanser
- cleanser
6 Polysorbate 80

General function
A solubiliser that dissolves fragrance and oils into water so the product stays clear.

Supporting ingredient
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
- emulsifier
- solubilizer
7 Acrylates Copolymer

General function
A hold polymer that forms a firm, humidity-resistant film. It is the usual source of a hard cast in gels.

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

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.
- film former
- polymer
8 Propanediol Caprylate

General function
A fatty ester. Esters give slip and a smooth after-feel; lighter ones read dry and silky, heavier ones read rich.

Supporting ingredient
Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.
PubChem
- light ester
- emollient
▾Below about here, the order stops meaning much. These are usually used at 1% or less.
9 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
10 Sodium Benzoate
- preservative
11 Sodium Methyl Oleoyl Taurate

General function
A mild cleanser that keeps foaming in hard 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 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
12 Sodium Cocoyl Isethionate

General function
A mild cleanser that gives a creamy lather and leaves hair less stripped than sulfates.

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
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.
- mild anionic cleanser
- cleanser
13 Cocamide MIPA

General function
A coconut-derived thickener that stabilises shampoo foam and gives the liquid its body.

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
Mild cleansing leaves more surface lubrication in place on hair that dries out quickly.

May suitVery dry or highly damaged hair
A sugar-derived non-ionic detergent, among the gentlest in use. It cleanses with little foam of its own and little sebum removal.

May not suitBuild-up-sensitive routines
Gentle cleansing leaves water-insoluble deposits largely in place; they come off with a stronger wash, not this one.
- secondary cleanser
- nonionic cleanser
- thickener
14 Cassia Hydroxypropyltrimonium Chloride
- conditioning agent
15 Polyquaternium-113

General function
A positively charged conditioning polymer. It leaves a thin film that cuts static and eases combing, and it survives rinsing better than a simple conditioner.

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
16 Chlorphenesin
- preservative
17 Tetrasodium EDTA

General function
Binds the metal ions in hard water so they cannot dull 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
18 Silicone Quaternium-22

General function
A conditioning silicone used for durable smoothing and slip.

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 surface film slows how quickly humidity reaches the cortex, which is what limits swelling-driven frizz in damp air.

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

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.
- silicone
- conditioning agent
- film former
19 Dipropylene Glycol

General function
A light humectant and solvent that helps fragrance and extracts dissolve evenly.

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
20 Epilobium Angustifolium Flower/Leaf/Stem Extract
- botanical extract
21 Polyglyceryl-3 Caprate
- emulsifier
22 PEG-45m
- thickener
23 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
24 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

What the whole list adds up to

5 cleansers
3 mild anionic cleansers
3 film formers
3 conditioning agents
2 solvents
2 secondary cleansers
2 humectants
2 emulsifiers
2 polymers
2 pH adjusters
2 preservatives
2 thickeners
2 hard-water chelators
1 amphoteric cleanser

Drug facts actives

salicylic acid 2%

This product is an over-the-counter drug as well as a cosmetic. It treats a cosmetic scalp condition; it does not diagnose or treat disease.

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

Price · 10.14 oz

Commonly seen $38–44 Midpoint $41.50 · 7 stores · checked Oct 31

Good value under $10 Under $0.95/oz it costs less than three-quarters of the 8 products we score as doing the same job

Priced above the products that do the same job. Stores sell it above the $10 line; products that do this job typically go for about $13 at this size.

Show the price ladder

Price for 10.14 ozlower is better

Where we’ve seen it8 listings · 8 stores

OUAI (brand DTC)
$38.00

10 oz · $3.80/oz

Aug 22Lowest per oz
Ulta Beauty
$38.00

10 oz · $3.80/oz

Oct 31
OUAI Official Site
$38.00

10 oz · $3.80/oz

Oct 31
Sephora
$38.00

10 oz · $3.80/oz

Oct 31
Selfridges
$41.50

10.14 oz · $4.09/oz

Oct 31
Harrods
$43.00

10.14 oz · $4.24/oz

Oct 31
Cult Beauty
$44.88

10.14 oz · $4.43/oz

Oct 31
Beaut Flo
$50.00

10.14 oz · $4.93/oz

Aug 30

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

10.14 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.
Commonly seen is the middle half of current prices for the 10.14 oz at recognised stores. We leave out the cheapest and most expensive quarters, so one sale or one overpriced listing can’t move it.
Good value under $10 comes from the 8 products we score as doing the same job as this one. A quarter of them cost less than $0.95/oz; at 10.14 oz that is $10. Under that line you are paying less than most of them.
About $13 is what those same products typically cost at this size: the midpoint of their prices per ounce, scaled to 10.14 oz.

Formula

Formula score

9 of 10

Above the range for shampoos per ounce for a complete formula, with no close, lower-priced match in our library.

How the score is counted

1 products that do the same job cost less per ounce
Costs more per ounce than 86% of the 1544 shampoos we’ve priced
Covers 6 of the 7 things a shampoo should do
Reviewers mention 5 things they like about how it performs

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 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, for less

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.

Paul MitchellLowest cost per oz Sheer Hydration Shampoo $1.58/oz $2.51/oz less

Sulfate-free
Protein-free
Deep clean

· Close function

Function: Scalp active
Film formers
Also: 10.1 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

Final decision

Should you buy it?

An above-range pick for the hair it suits

Best user

Flaking scalps, for an over-the-counter scalp active and washing without sulfates

Biggest tradeoff

Less suited to anyone sensitive to fragrance, curly-method routines, or dry or damaged hair

Best alternative if not

Paul Mitchell Sheer Hydration 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, 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.

SupportedBacked by ingredients

Partly supportedSome supporting logic

Stated by brandNo clear evidence

Potential conflictFormula works against claim

This gentle shampoo formulated with salicylic acid helps reduce flaking, itching, and irritation associated with dandruff

It carries an over-the-counter anti-dandruff active.

—

Supported

A recognised active does the work.

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.

Hair (not just scalp) described as left soft after use

Lather quality also called out positively alongside the medicated benefit

Scent praised despite being a medicated/OTC formula, unusual for the category per reviewers

Multiple reviewers note effective flake/scalp-clearing results

Reviewers report a noticeable reduction in flaking and visible improvement in scalp condition

dandruff sufferers

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.
3 sources consulted for this product (3 manufacturer or regulatory, 0 retailer, 0 editorial), last checked 2026-08-25.
Ingredient references are linked for 8 of 15 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 2026-08-25.