Act+Acre

Clarifying Hard Water Scalp + Hair Treatment

Scalp treatment

Scalp treatment
powder

Size1.41 fl oz

Priceabout $38commonly seen · 1.41 oz

Price / oz$26.95/ozat 1.41 oz

Where to buy5 stores · $38.00–38.00

Scent:

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

Manufacturer page: actandacre.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

Slip / detangling Little Not in your profile

Fragrance Prominent Not in your profile

Silicone / wax buildup None Not in your profile

Clarifying wash needed Low Not in your profile

Parabens / preservatives Not determined Not in your profile

Essential oils Not determined Not in your profile

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

Animal-derived ingredients Not yet verified Not in your profile

Show all 16 factors we check

The rest of what your plan weighs on this product.

Heavy humectants Heavy Not in your profile

Hard-water defence High Not in your profile

UV filter None listed Not in your profile

Ingredient list 10 ingredientsA short list Not in your profile

Price tier Salon Not in your profile

Where to buy it Brand websiteOne channel 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.

Start your consultation

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

Same job for less elsewhere

$26.95/oz at 1.41 oz — more than 86% of the 152 scalp treatments , which mostly run $3.22–20.64/oz.

View alternatives

Great for

Matte, textured stylesabsorbent powders do the mattifying

Short ingredient listsfifteen ingredients or fewer

Maybe skip if

this product carries a scent

Dry or very humid airwhere heavy humectants work against you

Tight budgetsit sits in the upper price tiers

Picking it up locallywe have it recorded in one channel only

Whether this much richness is right for you depends on your strand thickness, porosity, and how easily your hair flattens — 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.

Slip and detangling Little

Nothing here is built to reduce combing force.

Oils and butters None

No oils or butters in the list.

Water-binding (humectants) High

Humectants near the top — water-binding is a headline mechanism here.

Needs detergent to remove No

Nothing here needs a detergent wash to remove.

Hard-water defence Chelators present

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

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.

Ingredient	What it does	Why it matters	Chip
Distarch Phosphate	starch	Soaks up oil and adds grip	Neutral
Sodium Gluconate	hard-water chelator	Binds hard-water minerals	Stabilizes
Ascorbic Acid	antioxidant	Protects the oils from going off	Stabilizes
Sodium Cocoyl Glutamate	mild anionic cleanser	—	Cleanses
Inulin	humectant	Pulls water into the hair	Moisturizes
Oryza Sativa Starch	—	—	Neutral
Fructose	—	—	Neutral
FragranceAroma	fragrance	The scent	Fragrance

What the list leaves out, and what it carriesContains fragrance. Chelators for hard water.

Full ingredient list (10)

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 Distarch Phosphate

General function
A modified starch. It soaks up oil and water and leaves a dry, slightly grippy feel, which is what puts starches in dry shampoos and texture products.

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

May suitFine or easily flattened hair
Adds grip and body with no oil attached, which is what lifts fine hair at the root instead of weighing it down.

DependsMaximum-hold styling
Starch gives texture and grip rather than a set film; firm hold usually needs a polymer alongside it.
- starch
- absorbent
2 Sodium Gluconate

General function
A gentle, biodegradable chelator that binds hard-water minerals in place of EDTA.

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

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
3 Ascorbic Acid

General function
Vitamin C, used as an antioxidant and, in some treatments, to help remove mineral build-up.

Leading ingredient
Listed in the first three ingredients, it is likely a structural part of this formula.
PubChem
- antioxidant
- vitamin
4 Sodium Cocoyl Glutamate

General function
An amino-acid-derived cleanser, among the mildest in common use, with a low-foam, creamy feel.

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.

PubChem
- mild anionic cleanser
- cleanser
5 Inulin

General function
A plant sugar used for light moisture and as a prebiotic scalp claim.

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

May suitFine or easily flattened hair
Hydration with no oil attached, so it adds very little weight even high on a list.

May suitVery dry or highly damaged hair
Aloe is mostly water carrying sugars that bind more of it, which is why it turns up as the base of moisture-first formulas.

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.
- humectant
- botanical extract
6 Oryza Sativa Starch
7 Fructose
▾Below about this point, order stops being meaningful — these are typically used at 1% or less.
8 Fragrance · Aroma

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
9 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
10 Betaine

General function
A sugar-beet derived humectant that binds water. Despite the name it is not a cleanser like cocamidopropyl betaine.

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

What the whole list adds up to

2 hard-water chelators
2 humectants
1 starch
1 absorbent
1 antioxidant
1 vitamin
1 mild anionic cleanser
1 cleanser
1 botanical extract
1 fragrance
1 declared fragrance
1 pH adjuster

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

Price · 1.41 oz

Commonly seen about $38 Midpoint $38 · 4 stores · checked Sep 17

Good value under $27 Under $19.10/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 $27 line; products that do this job typically go for about $35 at this size.

Show the price ladder

Price for 1.41 ozlower is better

Where we’ve seen it5 listings · 5 stores

Act+Acre (actandacre.com)
$38.00

1.41 oz · $26.95/oz

Sep 16Lowest per oz
Sephora
$38.00

1.41 oz · $26.95/oz

Sep 17
Act+Acre
$38.00

1.41 oz · $26.95/oz

Sep 17
Anthropologie
$38.00

1.41 oz · $26.95/oz

Sep 17
REVOLVE
$38.00

1.41 oz · $26.95/oz

Sep 17

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

1.41 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 1.41 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.
Good value under $27 comes from the 8 products we score as doing the same job as this one. A quarter of them cost less than $19.10/oz; at 1.41 oz that is $27. Under that line you are paying less than most of them.
About $35 is what those same products typically cost at this size — the midpoint of their prices per ounce, scaled to 1.41 oz.

Formula

Formula score

2 of 10

It costs more per ounce than 86% of the 152 scalp treatments we’ve priced, the formula leaves out conditioning agents up front, and 2 close matches sell for at least a quarter less per ounce.

How the score is counted

2 products we score as doing the same job cost less per ounce
Costs more per ounce than 86% of the 152 scalp treatments we’ve priced
No conditioning agents up front in the formula
No oils or butters in the working zone either

Conditioning agents up frontWhat makes wet hair comb through.3 pts
Oils or butters in the working zoneSoftens the strand rather than just coating it.2 pts
Slip for detanglingReduces the force it takes to comb wet hair.2 pts
A humectantBinds water into the hair.1 pt
A pH adjusterBrings the formula to the acidic pH hair prefers.1 pt
Fragrance kept out of the top eightScent as a finishing touch, not a major share.1 pt

The formula score 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.

BiolageLowest cost per oz Scalp Sync Purifying & Exfoliating Concentrate $4.13/oz $22.82/oz less

Vegan & CF

· Close function

Function: Film formers
Also: Cruelty-free
Vegan
6.8 oz bottle

Compare

Bread Beauty SupplyClose function Scalp-Serum: Cooling Greens Exfoliating Scalp Treatment $4.38/oz $22.57/oz less

Function: Film formers
Also: Mint scent
1.7 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

Final decision

Should you buy it?

Hard to justify at this price

Best user

Matte, textured styles who want a matte finish and fewer ingredients to react to

Biggest tradeoff

Not ideal for anyone sensitive to fragrance, very dry or very humid climates, or people shopping on a budget

Best alternative if not

Biolage Scalp Sync Purifying & Exfoliating Concentrate — 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

Removes build-up to restore shine

The detergent strength of this formula is not recorded.

Sodium Gluconate
Sodium Cocoyl Glutamate
Citric Acid

Stated by brand

Can’t be confirmed from label.

Hydrates scalp to improve elasticity + prevent breakage

Humectants or rich emollients sit in the first eight ingredients.

Inulin
Betaine

Supported

Helps hair feel hydrated.

Balances microbiome to reduce irritation

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

—

Stated by brand

Can’t be confirmed from label.

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 locs or textured hair report finally clearing years of hard-water buildup that other clarifying methods could not remove

loc and curly/coily hair wearers

customers in hard-water regions describe a dramatic reduction in buildup, dullness and brassiness after regular weekly use

hard-water and well-water users across several regions

several reviewers say the treatment leaves hair noticeably softer, shinier and with more volume without over-drying it

reviewers with fine and thick hair types

a recurring complaint is a strong, sometimes metallic or sulfurous smell that lingers on the hair for a day or more after rinsing

reviewers who otherwise liked the results

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.
3 sources consulted for this product (2 manufacturer or regulatory, 0 retailer, 1 editorial), last checked 2026-09-16.
Ingredient references are linked for 4 of 7 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 2026-09-17.