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Curls

Sea Moss Powerhouse Shampoo

Shampoo / Gentle cleanser, gentle

  • Shampoo
  • Sulfate-free
  • Silicone-free
  • Curly-method
  • Cruelty-free · PETA-listed
Size8 fl oz
Price$12–16commonly seen · 8 oz
Price / oz$1.87/ozat 8 oz

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: shopcurls.com

Personal fit

Is this right for you?

Complete the consultation to see how well this product fits your hair and your goals. With 6,000+ products in our library, we can match you to the right ones.

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$49 with 60 days of follow-up questions and plan updates

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Upper-mid price for a shampoo

$1.87/oz at 8 oz, more than 58% of the 1544 shampoos , which mostly run $0.79–3.04/oz. The cost less.

Price and stores

Great for

Colour-treated hairthat fades faster in a sulfate wash
Frequent washerswho want gentler cleansing
Maximum slipfor hair that tangles the moment it is wet
Curly-method routinesno sulfates and no water-insoluble silicones
Silicone-free routinesno silicones appear in the list
Low-lather washesthis works as a cream rather than a foam

Maybe skip if

this product has a scent
Heavy product buildupthis is not a clarifying wash
A squeaky-clean feelthis deliberately leaves conditioning behind
Foam-heavy washesit barely lathers
Dry or very humid airwhere heavy humectants work against you
Hard waterno chelator here to bind the minerals

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 Gentle

Removes light dirt and oil without stripping.

Expected lather Low

A thin, quick-collapsing lather.

Slip and detangling High

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

Water-binding (humectants) High

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

Scalp active None

No over-the-counter scalp active.

Hard-water defence None

No chelating agent in the list.

Needs detergent to remove No

Nothing here needs a detergent wash to remove.

Protein Minor

Protein appears, low enough to be a supporting ingredient.

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.

IngredientWhat it doesWhy it mattersChip
Water solvent The base everything else is dissolved in Neutral
Cocamidopropyl Betaine amphoteric cleanser — Cleanses
Propanediol humectant Pulls water into the hair Moisturizes
Polysorbate 80 emulsifier Keeps oil and water mixed Stabilizes
Polyquaternium-10 conditioning agent Puts conditioning back as it washes Detangles
Polyquaternium-7 conditioning agent Puts conditioning back as it washes Detangles
Chondrus Crispus (Sea Moss) Extract botanical extract A plant extract, there as much for marketing as for function Neutral
Laminaria Digitata (Sea Kelp) Extract botanical extract A plant extract, there as much for marketing as for function Neutral
Hydrolyzed Soy Protein film former A supporting film former Protein
Fragrance fragrance The scent Fragrance
What the list leaves out, and what it carriesNo sulfates, silicones, or drying alcohols. Contains fragrance.
Full ingredient list (19)

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 Propanediol
    General function

    A corn-derived humectant and solvent, often chosen as a lighter-feeling alternative to propylene glycol.

    Leading ingredient

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

    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
  • 4 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
  • 5 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.

    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

    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
  • 6 Polyquaternium-7
    General function

    A conditioning polymer that improves wet combing and adds body. Repeated use can build up on fine hair.

    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

    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
  • 7 Chondrus Crispus (Sea Moss) Extract
    • botanical extract
  • 8 Laminaria Digitata (Sea Kelp) Extract
    General function

    An extract of Sea Kelp (Laminaria Digitata). Plant extracts are used across a wide range of levels, and label order is the best guide to how much is here.

    Supporting ingredient

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

    • botanical extract
  • 9 Ahnfeltiopsis Concinna (Red Algae) Extract
    • botanical extract
  • 10 Macrocystis Pyrifera (Kelp) Extract · Algae Extract
    • botanical extract
  • 11 Aloe Barbadensis Leaf Juice
    General function

    Aloe gel, used for light moisture and slip. High in the list it also contributes a little natural hold.

    Secondary ingredient

    Lower in the ordered portion of the list, it is more likely playing a supporting role than defining the formula.

    May suitCurls or waves needing flexible hold

    Gums thicken and set soft, which gives definition that bends rather than a rigid cast.

    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.

    • humectant
    • botanical extract
    • gum
  • 12 Decyl Glucoside
    General function

    A sugar-derived, low-foam cleanser used in gentle and curly-method shampoos.

    Secondary ingredient

    Lower in the ordered portion of the list, it is more likely playing a supporting role than defining the formula.

    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.

    PubChem
    • nonionic cleanser
    • cleanser
  • 13 Panthenol
    General function

    Provitamin B5. It draws in water and penetrates the strand a little, which is why it is the standard ingredient for softness and shine claims.

    Secondary ingredient

    Lower in the ordered portion of the list, it is more likely playing a supporting role than defining the formula.

    May suitFine or easily flattened hair

    It hydrates without adding oil or a film, which is the combination fine hair usually needs.

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

    Deposits a lubricating layer that makes combing easier, which is most of what stops mechanical damage adding to frizz.

    May suitVery dry or highly damaged hair

    A humectant that also penetrates the cuticle, so it holds water inside the strand rather than only on the surface.

    PubChem
    • humectant
    • conditioning agent
    • vitamin
  • 14 Hydrolyzed Soy Protein
    General function

    A plant protein used for body and moisture retention.

    Secondary ingredient

    Lower in the ordered portion of the list, it is more likely playing a supporting role than defining the formula.

    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
  • ▾Below about here, the order stops meaning much. These are usually used at 1% or less.
  • 15 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
  • 16 Sodium Benzoate
    • preservative
  • 17 Phenoxyethanol
    • preservative
  • 18 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
  • 19 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

What the whole list adds up to

  • 5 botanical extracts
  • 3 humectants
  • 3 film formers
  • 2 solvents
  • 2 cleansers
  • 2 conditioning agents
  • 2 polymers
  • 2 preservatives
  • 2 pH adjusters
  • 1 amphoteric cleanser
  • 1 secondary cleanser
  • 1 emulsifier
  • 1 solubilizer
  • 1 gum

Ingredient list captured 2026-10-01. Formulas change, so check the package in your hand when an ingredient matters to you.

Price · 8 oz

Commonly seen $12–16 Midpoint $14.98 · 3 stores · checked Oct 7
Good value under $8 Under $0.98/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 $8 line; products that do this job typically go for about $11 at this size.

Show the price ladder
Where we’ve seen it4 listings · 4 stores

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. 8 oz is the size stores list most often; every comparison on this page is made at it. Other sizes are shown in the Sizes row and the store list.
  2. Commonly seen is the middle half of current prices for the 8 oz at recognised stores. We leave out the cheapest and most expensive quarters, so one sale or one overpriced listing can’t move it.
  3. Good value under $8 comes from the 8 products we score as doing the same job as this one. A quarter of them cost less than $0.98/oz; at 8 oz that is $8. Under that line you are paying less than most of them.
  4. About $11 is what those same products typically cost at this size: the midpoint of their prices per ounce, scaled to 8 oz.

Formula

Formula score
10 of 10

The formula carries the systems a shampoo is built around, and it sits in the middle of the range for shampoos per ounce.

How the score is counted
  • 4 products we score as doing the same job cost less per ounce
  • Costs more per ounce than 58% of the 1544 shampoos we’ve priced
  • Covers 7 of the 7 things a shampoo should do
  • Reviewers mention 3 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.

As I AmFragrance-free Rice Water Shampoo $1.25/oz $0.62/oz less
  • Fragrance-free
  • Unscented
  • Sulfate-free
· Close function
Function
  • Slip and detangling
Also
  • Unscented
  • Drugstore tier
Compare
Taliah WaajidLowest cost per oz Green Apple and Aloe Nutrition Shampoo $0.92/oz $0.95/oz less
  • Sulfate-free
  • Gentle cleanse
  • Curly method
· Close function
Function
  • Water-binding (humectants)
  • Oils and butters
Also
  • Drugstore tier
  • 12 oz bottle
Compare
Mielle OrganicsLighter feel Mango & Tulsi Nourishing Shampoo $1.00/oz $0.87/oz less
  • Sulfate-free
  • Protein-free
  • Gentle cleanse
· Close function
Function
  • Water-binding (humectants)
  • Oils and butters
  • Protein
Also
  • Coconut scent
  • 12 oz bottle
  • Sold online
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

Suits every hair pattern

Final decision

Should you buy it?

A solid pick for the hair it suits
Best user

Colour-treated hair, looking for washing without sulfates and gentle cleansing without foam

Biggest tradeoff

Less suited to anyone sensitive to fragrance, heavy buildup that needs a clarifying wash, or anyone who wants a squeaky-clean feel

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.

0
SupportedBacked by ingredients
0
Partly supportedSome supporting logic
0
Stated by brandNo clear evidence
1
Potential conflictFormula works against claim
Natural detox and purifying shampoo that promotes scalp health

The detergent system is gentle; it is unlikely to clear heavy build-up on its own.

  • Cocamidopropyl Betaine
  • Decyl Glucoside
  • Citric Acid
Potential conflict

Too gentle for real build-up.

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.

Reviewers describe the cleanser as moisturizing and helpful for preserving curl structure and manageability

Exact-product customer quote reproduced by beauty editorial

Cleanses curly hair weekly without leaving it dry

Verified Walmart reviewer of exact 8 oz SKU

Independent testing found a silky, non-stripping wash that left scalp and hair comfortable

Independent exact-product review

Some aggregate feedback mentions scent dissatisfaction and occasional packaging/seal issues

Supplemental exact-product review aggregate; not treated as raw attributed text

More from Curls

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.
  • 10 sources consulted for this product (2 manufacturer or regulatory, 5 retailer, 3 editorial), last checked 2026-10-07.
  • Ingredient references are linked for 6 of 11 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 2026-09-02.

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