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Cantu

Guava & Ginger Scalp Nourishing Treatment Serum

Scalp treatment

  • Scalp treatment
  • serum
  • Sulfate-free
  • Silicone-free
  • Protein-free
  • Vegan · ingredient list
  • Cruelty-free · PETA-listed
Size4 fl oz
Price$5.78 Good valueseen at one store · 4 oz
Price / oz$1.79/ozat 4 oz

Scent:

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

Manufacturer page: cantubeauty.co.uk

Personal fit

Is this right for you?

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  • Your goals, scalp, damage history, water, budget, and scent preferences all shape your plan.

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Lower cost than most scalp treatments

$1.79/oz at 4 oz — less than 93% of the 152 scalp treatments , which mostly run $3.22–20.64/oz.

Price and stores

Great for

Protein-sensitive hairthat stiffens when protein is added
Coarse or dry hairthat absorbs everything you give it
Silicone-free routinesno silicones appear in the list
Very dry hairno fast-drying alcohol in the list
Vegan and cruelty-freeour researched record has it as both
Tight budgetsit sits in the lower price tiers

Maybe skip if

this product carries a scent
Oily scalp or fine hairthat gets weighed down

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 Some

Some slip, mostly from esters or silicones rather than conditioners.

Oils and butters Present, high in the list

Oils sit high in the list — a softening, coating formula.

Weight on the hair Rich

Heavy butters and waxes in the first eight ingredients.

Water-binding (humectants) Low

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

Protein None

No protein or amino acids in the list.

Needs detergent to remove No

Nothing here needs a detergent wash to remove.

Hard-water defence None

No chelating agent in the list.

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.

IngredientWhat it doesWhy it mattersChip
Glycine Soja (Soybean) Oil oil Coats and softens the strand Softens
Isopropyl Palmitate light ester Light slip without much weight Softens
FragranceParfum/Fragrance fragrance The scent — a large share of the formula at this position Fragrance
Psidium Guajava (Guava) Leaf Extract botanical extract A plant extract, marketed as much as functional Neutral
Zingiber Officinale (Ginger) Root Extract botanical extract A plant extract, marketed as much as functional Neutral
Daucus Carota Sativa (Carrot) Seed Oil oil Coats and softens the strand Softens
Oryza Sativa (Rice) Bran Extract botanical extract A trace plant extract Stabilizes
Rosmarinus Officinalis (Rosemary) Leaf Extract botanical extract A trace plant extract Stabilizes
Menthol fragrance The scent Fragrance
Rosmarinus Officinalis (Rosemary) Leaf Oil botanical extract A trace plant extract Fragrance
Melaleuca Alternifolia (Tea Tree) Leaf Oil botanical extract A trace plant extract Fragrance
Mentha Piperita (Peppermint) Oil botanical extract A trace plant extract Fragrance
What the list leaves out, and what it carriesThe list carries no sulfates, silicones, or drying alcohols. No protein — a moisture formula, not a repair one. Fragrance is on the label. Heavier butters sit in the working part of the list.
Full ingredient list (25)

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 Glycine Soja (Soybean) Oil
    General function

    A light plant oil used to soften and carry other oil-based ingredients.

    Leading ingredient

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

    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.

    May not suitFine or easily flattened hair

    Near the top of a list an oil is weight before it is anything else, and fine hair shows that first at the roots.

    • oil
    • emollient
  • 2 Isopropyl Palmitate
    General function

    A light ester that spreads quickly and leaves a smooth, non-greasy feel.

    Leading ingredient

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

    May suitFine or easily flattened hair

    A light emollient: it softens the surface with noticeably less weight than an oil or a butter.

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

    Spreads thin and lowers friction between strands without the heaviness of a fixed oil.

    PubChem
    • light ester
    • emollient
  • 3 Fragrance · Parfum/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.

    Leading ingredient

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

    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
  • 4 Psidium Guajava (Guava) Leaf Extract
    General function

    An extract from the leaf of Guava (Psidium Guajava). 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
  • 5 Zingiber Officinale (Ginger) Root Extract
    General function

    Ginger extract, a traditional scalp botanical used at low levels.

    Supporting ingredient

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

    • botanical extract
  • 6 Daucus Carota Sativa (Carrot) Seed Oil
    General function

    The oil pressed from Daucus Carota. 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.

    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

    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.

    May not suitFine or easily flattened hair

    Near the top of a list an oil is weight before it is anything else, and fine hair shows that first at the roots.

    • oil
    • emollient
  • Below about this point, order stops being meaningful — these are typically used at 1% or less.
  • 7 Oryza Sativa (Rice) Bran Extract
    General function

    A rice bran extract used for antioxidants and label appeal.

    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.

    • botanical extract
    • antioxidant
  • 8 Rosmarinus Officinalis (Rosemary) Leaf Extract
    General function

    Rosemary extract, used both as a scent note and as a natural antioxidant in scalp 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.

    • botanical extract
    • antioxidant
  • 9 Helianthus Annuus (Sunflower) Extract
    • botanical extract
  • 10 Tocopherol · Tocopherol (Vitamin E)
    • antioxidant
    • vitamin
  • 11 Menthol
    General function

    Produces the cooling, tingling feeling on the scalp. The sensation is real; it is not evidence that anything else is happening.

    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.

    PubChem
    • fragrance
    • active
  • 12 Persea Gratissima (Avocado) Oil
    General function

    A rich oil used in masks and heavier creams for softness on coarse or dry 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
  • 13 Ricinus Communis (Castor) Seed Oil
    General function

    A thick, tacky oil used for sealing ends and for slick, held-down styles.

    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
  • 14 Vitis Vinifera (Grape) Seed Oil
    General function

    A light oil used where softness is wanted without weight.

    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
  • 15 Rosmarinus Officinalis (Rosemary) Leaf Oil
    General function

    Rosemary essential oil, used for scent and its traditional scalp reputation.

    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

    Essential oils are fragrance. Several carry constituents on the EU list of declared fragrance allergens, so a label with no fragrance line can still be a scented product.

    • botanical extract
    • essential oil
    • fragrance
  • 16 Melaleuca Alternifolia (Tea Tree) Leaf Oil
    General function

    Tea tree essential oil, used in scalp products for its sharp scent and traditional clarifying reputation.

    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

    Essential oils are fragrance. Several carry constituents on the EU list of declared fragrance allergens, so a label with no fragrance line can still be a scented product.

    • botanical extract
    • essential oil
    • fragrance
  • 17 Urtica Dioica (Nettle) Extract
    • botanical extract
  • 18 Equisetum Arvense Extract · Equisetum Arvense (Horsetail) Extract
    • botanical extract
  • 19 Glycerin
    General function

    A small water-loving molecule that draws moisture into the hair and holds it there. It is the most common softening ingredient in conditioners and leave-ins.

    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

    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
  • 20 Propylene Glycol
    General function

    A small humectant and solvent that keeps formulas stable and helps active ingredients spread.

    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
    • humectant
    • solvent
  • 21 Mentha Piperita (Peppermint) Oil
    General function

    Peppermint essential oil, used for scent and the cooling feeling on the scalp.

    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

    Essential oils are fragrance. Several carry constituents on the EU list of declared fragrance allergens, so a label with no fragrance line can still be a scented product.

    • botanical extract
    • essential oil
    • fragrance
  • 22 Water · Aqua/Water
    • solvent
  • 23 Citral
    General function

    A lemon-scented fragrance component listed separately as a recognised allergen.

    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

    One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

    PubChem
    • fragrance
    • named fragrance allergen
  • 24 Citronellol
    General function

    A rose-like fragrance component named separately as a recognised allergen.

    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

    One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

    PubChem
    • fragrance
    • named fragrance allergen
  • 25 Linalool
    General function

    A floral fragrance component listed separately as a recognised contact allergen.

    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

    One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

    PubChem
    • fragrance
    • named fragrance allergen

What the whole list adds up to

  • 10 botanical extracts
  • 8 fragrances
  • 6 emollients
  • 5 oils
  • 3 antioxidants
  • 3 essential oils
  • 3 named fragrance allergens
  • 2 humectants
  • 2 solvents
  • 1 light ester
  • 1 declared fragrance
  • 1 vitamin
  • 1 active

Ingredient list captured 2026-09-07. Formulas change — check the package in your hand when an ingredient matters to you.

Price · 4 oz

Seen at $5.78 lowest of 2 stores · checked Sep 8
Good value under $11 Under $2.68/oz it costs less than three-quarters of the 8 products we score as doing the same job

Usually a good value. Most stores sell it under the $11 line, and products that do this job typically go for about $19 at this size.

Show the price ladder
Where we’ve seen it3 listings · 3 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. 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.
  2. Seen at $5.78 is the price we have observed for the 4 oz. We need three stores before we call a price commonly seen.
  3. Good value under $11 comes from the 8 products we score as doing the same job as this one. A quarter of them cost less than $2.68/oz; at 4 oz that is $11. Under that line you are paying less than most of them.
  4. About $19 is what those same products typically cost at this size — the midpoint of their prices per ounce, scaled to 4 oz.

Formula

Formula score
3 of 10

Low cost per ounce, with a short formula: there is no conditioning agents up front here, and that is a system most scalp treatments carry.

How the score is counted
  • Costs less per ounce than 93% of the 152 scalp treatments we’ve priced
  • No conditioning agents up front in the formula
  • No slip for detangling either
  • Drugstore tier, sold at Grocery / mass and Specialty beauty
  • 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

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.

Mielle OrganicsSame function Lavender & Lychee Scalp & Hair Build Up Remover $3.87/oz $2.08/oz more
  • Protein-free
  • Rich
  • Silicone-free
Differs
  • Mint scent
  • Masstige tier
Compare
Mielle OrganicsLowest cost per oz Rosemary Mint Scalp & Edge Cleansing Oil $2.50/oz $0.71/oz more
  • Protein-free
  • Rich
  • Silicone-free
· Same function
Differs
  • Sold online
Compare
Taliah WaajidClose function Scalp Care Follicle Therapy Growth Treatment $8.75/oz $6.96/oz more
Differs
  • Masstige tier
  • 2 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

Built for curly to coily hair

Final decision

Should you buy it?

A solid pick for the hair it suits
Best user

Hair that stiffens on protein who want a protein-free formula and a formula with real substance

Biggest tradeoff

Not ideal for anyone sensitive to fragrance or oily scalps and fine hair

Best alternative if not

Nothing in our library matches it closely 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.

3
SupportedBacked by ingredients
0
Partly supportedSome supporting logic
1
Stated by brandNo clear evidence
0
Potential conflictFormula works against claim
Guava, ginger, carrot, peppermint, and tea tree oils help relieve irritated scalps

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

Stated by brand

Can’t be confirmed from label.

Provides targeted moisture to thinning areas to help promote hair growth

Humectants or rich emollients sit in the first eight ingredients.

  • Glycine Soja (Soybean) Oil
  • Isopropyl Palmitate
  • Daucus Carota Sativa (Carrot) Seed Oil
Supported

Helps hair feel hydrated.

Nourishes + Soothes Dry, Itchy Scalp

Humectants or rich emollients sit in the first eight ingredients.

  • Glycine Soja (Soybean) Oil
  • Isopropyl Palmitate
  • Daucus Carota Sativa (Carrot) Seed Oil
Supported

Helps hair feel hydrated.

Sulfate Free

No sulfate detergents appear in the ingredient list.

Supported

Gentler on colour and coils.

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.

More from Cantu

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 (1 manufacturer or regulatory, 1 retailer, 1 editorial), last checked 2026-09-08.
  • Ingredient references are linked for 7 of 16 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 2026-09-08.