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Rusk

Deepshine Lustre Shine Enhancing Lusterizer

Finisher / Anti-frizz finisher, medium-weight

  • Finisher
  • anti frizz finish
  • cream
  • Sulfate-free
  • Moisture-rich
  • Curly-method
Size4.4 fl ozmost listed · 2 sizes
Price$12.83seen at one store · 4.4 oz
Price / oz$3.49/ozat 4.4 oz
Where to buy4 stores · 2 sizes

Scent:

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

Manufacturer page: ruskhair.com

Personal fit

Is this right for you?

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Priced with its peers

$3.49/oz at 4.4 oz — less than 57% of the 22 anti-frizz finishers , which mostly run $2.66–7.72/oz. The cost less.

Price and stores

Great for

Maximum slipfor hair that tangles the moment it is wet
Dry, thirsty hairhumectants and emollients both sit up front
Aerosol avoidancea pump or tube, not a pressurised can
A wide range of haira middle-of-the-range weight
Tight budgetsit sits in the lower price tiers

Maybe skip if

this product carries a scent
Very dry or damaged hairit contains fast-drying alcohol
Hair that reads dullno recognised shine system in the list
Silicone-free routinesit does contain silicones — the water-soluble kind
Picking it up locallywe have it recorded in one channel only

Whether a finisher this rich will read as shine or as grease depends on your strand thickness and oil rate — 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.

Weight on the hair Medium

Middle of the range — noticeable on fine hair, light on coarse hair.

Oils and butters None

No oils or butters in the list.

Needs detergent to remove Rinses with water

The silicones here are the water-soluble kind.

Fast-drying alcohol Present

Fast-drying alcohol is present — it speeds drying and can read dry on the hair.

Fragrance Present

Fragrance is listed; it sits below the working ingredients.

from the formula stated by the brand reported by reviewers Scale: 1 dot low · 5 dots high, within this product type.

Ingredients that matter

The ingredients that change a decision

The workhorse ingredients plus anything lower down that changes a decision. These chips name what an ingredient does — they are not safety scores, and no ingredient here is rated good or bad on its own.

IngredientWhat it doesWhy it mattersChip
WaterAqua (Water, Eau) solvent The base everything else is dissolved in Neutral
Cetyl Alcohol fatty alcohol Thickens and conditions — not a drying alcohol Shine
Dicetyldimonium Chloride conditioning agent Conditions and softens — this is what makes it comb through Detangles
Polyquaternium-37 conditioning agent Conditions and softens — this is what makes it comb through Detangles
Panthenol humectant Pulls water into the hair Detangles
Hedychium Coronarium (White Ginger) Flower/Leaf/Stem Extract botanical extract A plant extract, marketed as much as functional Neutral
Rosmarinus Officinalis (Rosemary) Leaf ExtractRosmarinus Officinalis Leaf Extract botanical extract A trace plant extract Stabilizes
Anthemis Nobilis Flower Extract botanical extract A trace plant extract Neutral
Wheat Amino Acids protein A small amount of protein Protein
Hydrolyzed Wheat Protein film former A supporting film former Protein
Hydrolyzed Wheat Protein PG-Propyl Silanetriol conditioning agent Adds slip, lower in the list Protein
Cocodimonium Hydroxypropyl Hydrolyzed Rice Protein conditioning agent Adds slip, lower in the list Protein
What the list leaves out, and what it carriesNo sulfates. Contains fragrance. Fast-drying alcohol is in the list.
Full ingredient list (32)

US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order. Annotations keep three readings separate: the ingredient's general function, its role in this product type, and what its position can support.

  • 1 Water · Aqua (Water, Eau)
    General function

    The base of almost every rinse-off and cream hair product. It carries everything else and is normally the first ingredient on the label.

    Leading ingredient

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

    • solvent
  • 2 Cetyl Alcohol
    General function

    A fatty alcohol used to thicken creams and add slip. It softens rather than dries.

    Leading ingredient

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

    May suitDry, coarse, or high-porosity hair

    The waxy solid that gives a conditioner its body. It deposits a soft lubricating layer, which is most of what makes hair feel smooth after rinsing.

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

    Deposits with the cationic conditioners and helps them lie flat along the strand, which is where the detangling actually comes from.

    DependsFine or easily flattened hair

    Near the top of a conditioner it is doing most of the conditioning, and most of the weighting, at the same time.

    PubChem
    • fatty alcohol
    • emollient
    • thickener
  • 3 Dicetyldimonium Chloride
    General function

    A conditioning agent used for slip in thick creams and masks.

    Leading ingredient

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

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

    A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.

    May suitVery dry or highly damaged hair

    The class that does the detangling in a conditioner. It deposits lubrication where the cuticle is worn.

    DependsBuild-up-sensitive routines

    Substantive by design. A routine with no detergent wash gives it nothing to leave with.

    PubChem
    • conditioning agent
  • 4 Polyquaternium-37
    General function

    A thickening polymer that gives creams and curl products their bounce and helps them cling to the strand.

    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
    • thickener
  • 5 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.

    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

    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
  • 6 Hedychium Coronarium (White Ginger) Flower/Leaf/Stem Extract
    General function

    An extract from the leaf/stem of White Ginger (Hedychium Coronarium). 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
  • ▾Below about this point, order stops being meaningful — these are typically used at 1% or less.
  • 7 Rosmarinus Officinalis (Rosemary) Leaf Extract · Rosmarinus Officinalis 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
  • 8 Anthemis Nobilis Flower Extract
    General function

    Roman chamomile extract, used at low levels for a soothing claim.

    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
  • 9 Aloe Barbadensis Leaf Extract
    General function

    A concentrated aloe extract used for light moisture and a soothing claim.

    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

    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.

    • botanical extract
    • humectant
  • 10 Simmondsia Chinensis Leaf Extract
  • 11 Macrocystis Pyrifera (Kelp) Extract · Algae Extract
    • botanical extract
  • 12 Wheat Amino Acids
    General function

    Wheat protein broken into amino acids, used for lightweight moisture binding.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

    May suitVery dry or highly damaged hair

    Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.

    DependsProtein-sensitive hair

    The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.

    • protein
    • amino acid
  • 13 Hydrolyzed Wheat Protein
    General function

    Wheat protein broken into fragments small enough to cling to the hair. It adds temporary strength and body; too much can feel stiff.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

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

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

    May suitMaximum-hold styling

    Film formers are what hold a style: they dry into a connected film across the strands so the shape resists movement.

    May suitVery dry or highly damaged hair

    Hydrolysed fragments are small enough to sit in the gaps of a worn cuticle for a wash or two, temporarily restoring stiffness and cutting breakage in combing.

    • film former
    • protein
    • hydrolysed protein
  • 14 Hydrolyzed Wheat Starch
    General function

    A starch fragment used for light body and film. It is a carbohydrate, not a protein.

    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

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

    DependsCurls or waves needing flexible hold

    How rigid the finish is depends on which polymer it is and what the formula pairs with it, not on there being one.

    DependsMaximum-hold styling

    Starch gives texture and grip rather than a set film; firm hold usually needs a polymer alongside it.

    • film former
    • starch
  • 15 Hydrolyzed Wheat Protein PG-Propyl Silanetriol
    General function

    A protein given a positive charge so it deposits where hair is damaged. It conditions and adds temporary firmness in one ingredient.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

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

    A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.

    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.

    • conditioning agent
    • film former
    • protein
    • hydrolysed protein
  • 16 Cocodimonium Hydroxypropyl Hydrolyzed Rice Protein
    General function

    A protein given a positive charge so it deposits where hair is damaged. It conditions and adds temporary firmness in one ingredient.

    Estimated lower-concentration zone

    It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

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

    A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.

    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.

    • conditioning agent
    • film former
    • protein
    • hydrolysed protein
  • 17 Cetrimonium Chloride
    General function

    A quick-acting conditioning agent that reduces static and combing force. It also helps keep the formula stable.

    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

    The C16 quat binds mostly by charge rather than by chain, so it deposits measurably less than the C22 ones. Less deposit is less conditioning and also less weight, which is usually the trade fine hair wants.

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

    A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.

    DependsBuild-up-sensitive routines

    Substantive by design. A routine with no detergent wash gives it nothing to leave with.

    International Journal of Cosmetic Science
    • conditioning agent
    • cleanser
  • 18 Isopropyl Alcohol
    General function

    A fast-evaporating alcohol used as a solvent and to speed drying. Well down the list it is a processing aid; near the top it can leave hair feeling dry.

    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

    Evaporates on contact, which is how a spray sets almost instantly and leaves no weight behind it.

    PubChem
    • drying alcohol
    • solvent
  • 19 Propylene Glycol Dicaprylate/Dicaprate
    General function

    A light, dry-feeling ester that spreads other ingredients and softens without a greasy finish.

    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

    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.

    • light ester
    • emollient
  • 20 PPG-1 Trideceth-6
    • emulsifier
    • solubilizer
  • 21 Magnesium Nitrate
    • salt
  • 22 Bisamino PEG/PG-41/3 Aminoethyl PG-Propyl Dimethicone
  • 23 Methylchloroisothiazolinone
    • isothiazolinone
    • preservative
  • 24 Magnesium Chloride
    • salt
  • 25 Potassium Sorbate
    • preservative
  • 26 Phenoxyethanol
    • preservative
  • 27 PEG-12 Dimethicone
    General function

    A water-soluble silicone that smooths without the build-up concern of standard silicones.

    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

    The PEG- and PPG-modified silicones disperse in water, so ordinary washing carries them off instead of leaving a film to accumulate.

    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

    Delivers the slip and surface smoothing of a silicone without needing a detergent wash to remove it afterwards.

    • emollient
    • silicone
    • water-soluble silicone
  • 28 Methylisothiazolinone
    • isothiazolinone
    • preservative
  • 29 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.

    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
  • 30 Benzyl Benzoate
    General function

    A fragrance component with a faint balsamic scent, named separately on the label because it is 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
  • 31 Benzyl Alcohol
    • preservative
    • solvent
  • 32 Sodium Benzoate
    • preservative

What the whole list adds up to

  • 6 preservatives
  • 5 conditioning agents
  • 5 film formers
  • 5 botanical extracts
  • 4 proteins
  • 3 solvents
  • 3 emollients
  • 3 hydrolysed proteins
  • 2 thickeners
  • 2 humectants
  • 2 salts
  • 2 isothiazolinones
  • 2 fragrances
  • 1 fatty alcohol

Ingredient list captured 2026-09-14. Formulas change — check the package in your hand when an ingredient matters to you.

Price · 4.4 oz

Seen at $12.83 lowest of 2 stores · checked Sep 15
Good value under $10 Under $2.28/oz it costs less than three-quarters of the 7 products we score as doing the same job

Priced above the products that do the same job. Stores sell it above the $10 line; products that do this job typically go for about $15 at this size.

Sizes

4 oz
$10
$2.50/oz
4.4 ozmost listed
$12.83
$3.49/oz

The 4 oz costs the least per ounce — 28% less than the 4.4 oz.

Show the price ladder
Where we’ve seen it5 listings · 5 stores

4.4 ozmost listed

4 ozBest per ounce

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. 4.4 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 $12.83 is the price we have observed for the 4.4 oz. We need three stores before we call a price commonly seen.
  3. Good value under $10 comes from the 7 products we score as doing the same job as this one. A quarter of them cost less than $2.28/oz; at 4.4 oz that is $10. Under that line you are paying less than most of them.
  4. Each size is guarded on its own, so a multipack or a marketplace listing at one size cannot move another.
  5. About $15 is what those same products typically cost at this size — the midpoint of their prices per ounce, scaled to 4.4 oz.

Formula

Formula score
10 of 10

The formula carries the systems a anti-frizz finisher is built around, and it sits in the middle of the range for anti-frizz finishers per ounce.

How the score is counted
  • Costs less per ounce than 57% of the 22 anti-frizz finishers we’ve priced
  • Covers 6 of the 6 things a anti-frizz finisher should do
  • Drugstore tier, sold at Brand website
  • Drugstore tier
  • A shine systemThe silicone, oil, or ester that produces gloss.3 pts
  • A weightless carrierDelivers the shine without leaving grease.2 pts
  • Oils or butters in the working zoneSoftens the strand rather than just coating it.2 pts
  • An antioxidantKeeps the oils in the bottle from going off.1 pt
  • No drying alcohol in the first threeFast drying without leading on alcohol.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.

DavinesSilicone-free HEART OF GLASS Instant Bonding Glow $5.33/oz $1.84/oz more
  • Silicone-free
  • Rinses clean
  • Shine
· Related function
Function
  • Silicone type
  • Film formers
  • Oils and butters
Also
  • Cruelty-free
  • Prestige tier
  • 10.1 oz bottle
Compare
Color WowLowest cost per oz Dream Coat for Curly Hair $3.45/oz $0.04/oz less
  • Fragrance-free
  • Unscented
  • Shine
· Related function
Function
  • Film formers
  • Hold system
  • Fast-drying alcohol
Also
  • Unscented
  • Salon tier
  • 6.7 oz bottle
Compare
SEENFragrance-free Blow-Out Creme, Fragrance Free $5.80/oz $2.31/oz more
  • Fragrance-free
  • Unscented
  • Protein-free
· Related function
Function
  • Silicone type
  • Film formers
  • Protein
Also
  • Unscented
  • Cruelty-free
  • Vegan
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

Suits every hair pattern

Final decision

Should you buy it?

Good for the right person
Best user

People who want maximum slip, looking for real detangling slip and moisture that stays in

Biggest tradeoff

Worth skipping for anyone sensitive to fragrance, very dry or high-damage hair, or hair that reads dull

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
shine

The formula carries a recognised shine system — silicone, oil, or light ester.

  • Propylene Glycol Dicaprylate/Dicaprate
Supported

Reflects light for visible shine.

detangles

Conditioning agents that reduce combing force sit high in the list.

  • Cetyl Alcohol
  • Dicetyldimonium Chloride
  • Polyquaternium-37
Supported

Easier detangling, less breakage.

reduces frizz

Silicones or film formers smooth the cuticle, which is the usual mechanism.

  • Polyquaternium-37
  • Hydrolyzed Wheat Protein
  • Hydrolyzed Wheat Starch
Supported

Smoother strands, less frizz.

thermal protection

Heat protection is a performance claim; an ingredient list cannot confirm it.

  • Polyquaternium-37
  • Wheat Amino Acids
  • Hydrolyzed Wheat Protein
Stated by brand

Only lab testing can show this.

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.

A recurring complaint is that the product became hard to find or was believed discontinued, with buyers relieved to reorder directly from Rusk.

Many long-time users say the product delivers strong shine and softness and call it a favorite they repurchase for years.

A minority of reviewers found the shine payoff underwhelming or felt it did not deliver the slip they wanted.

Several reviewers describe it as lightweight and non-greasy while still smoothing and adding shine to the hair.

More from Rusk

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.
  • 6 sources consulted for this product (0 manufacturer or regulatory, 2 retailer, 4 editorial), last checked 2026-09-14.
  • Ingredient references are linked for 6 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 2026-09-15.

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