Beauty ingredient research

Beauty ingredients explained in plain English

Browse the review database to understand what an ingredient is, what it does in a beauty formula, when it is useful, and when it deserves caution across skincare, haircare, bodycare, makeup, and more.

20769

Reviewed ingredients

524

Low-concern standouts

2884

Need usage caution

Showing 60 of 20,303
AllUV absorberUV filterabrasiveabsorbentacne treatmentactiveactive ingredientadhesivealkalizing agentamino acidanti-aginganti-androgenanti-cavityanti-cavity agentanti-inflammatoryanti-irritantanticariesanticavity agentantidandruffantifungalantimicrobialantioxidantantiperspirantantiplaqueastringentbarrier repairbarrier supportbarrier-repairbarrier-supportbinderbinding agentbiotechbiotechnologybond-builderbotanicalbotanical extractbotanical oilbotanical waterbrighteningbrightening agentbufferbuffering agentcell-communicating ingredientceramidechelating agentchemicalchemical intermediateclaycleansercleansingcleansing agentcolorantconditionerconditioningconditioning agentcooling agentcosmeticcosmetic additivecosmetic colorantcosmetic ingredientcosmetic pigmentcosmetic powdercosmetic-texturizercosmetic-waxcosmeticscrosslinking agentdelivery agentdelivery systemdenaturantdeodorantdeodorant agentdepigmenting agentdepilatorydepilatory agentdesensitizing agentdyedye intermediatedye precursordye-intermediateemollientemulsifierenzymeessential oilexfoliantexperimentaleyelashfermentfilm formerfilm-formerfilm-formingfilm-forming agentfirming agentfixativeflavoring agentformulationfragrancefragrance ingredientfunctional ingredientgashair carehair colorhair coloranthair conditionerhair dyehair removalhair-carehair-colorhaircarehumectantindustrialinsecticideintermediatelashlash carelash enhancerlash-and-browlip carelipidmakeupmarine extractmasking agentmicrobiomemicrobiome modulatormineralmoisturizernail carenail-careocclusiveoilopacifieropacifying agentoptical agentoral careotheroxidative dyeoxidative dye precursoroxidizing agentpH adjusterpain reliefpenetration enhancerpeptidepersonal careph adjusterpharmaceuticalpheromonepigmentplant oilplasticizerpolymerpolymer precursorprebioticprescription-drugpreservativepreservative boosterprobioticprocessing agentprocessing aidpropellantproteinpurifyingreducing agentretinoidscalp caresebum regulatorsebum-regulatorself-tannerself-tanningsensory additivesensory agentsensory modifiersiliconeskin barrierskin barrier supportskin conditionerskin conditioningskin conditioning agentskin lighteningskin protectantskin-conditioningskin-conditioning agentskin-identicalskin-identical ingredientskin-lighteningskin-lightening agentskincaresolventsoothingsoothing agentstabilizerstimulantsunscreensurfactantsyntheticsynthetic colorantsynthetic dyesynthetic resinsynthetic-coloranttexture enhancertexturizerthickenertoneruv-absorberuv-filtervasoactivevasodilatorviscosity controlviscosity controllingviscosity controlling agentvitaminwax

Emollient

Docosane

Docosane

3.5

Docosane is a gentle, non-greasy wax that helps skincare products feel smooth and stay put without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Fragrance Component

Dodecahydro Tetramethyl Epoxynaphthoxepin

DODECAHYDRO-TETRAMETHYL-EPOXYNAPHTHOXEPIN

3.5

A synthetic scent ingredient that adds a warm, woody note to products, but offers no skincare benefit and may be a concern for those avoiding fragrance.

Irritation

low

Source

synthetic

beautyskincarefragrance
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Fragrance Ingredient

Dodecahydrocyclododecafuran

DODECAHYDROCYCLODODECAFURAN

3.5

A synthetic fragrance ingredient that adds a warm, woody scent but offers no skincare benefits and may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Solvent

Dodecane

DODECANE

3.5

Dodecane is a lightweight, volatile oil that helps products spread smoothly and evaporate quickly without leaving a greasy feel.

Irritation

low

Source

synthetic

beautyskincaresolvent
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Sebum Regulator

Dodecanedioic Acid

Dodecanedioic Acid

4.0

A gentle, oil-soluble acid that helps control shine and smooth skin texture without the irritation of stronger exfoliants.

Irritation

low

Source

synthetic

beautyskincareexfoliant
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Film-Former

Dodecanedioic Acid Copolymer

DODECANEDIOIC ACID/CETEARYL ALCOHOL/GLYCOL COPOLYMER

4.0

A gentle film-forming polymer that helps skincare and makeup stay put longer without feeling heavy or sticky.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Fragrance Ingredient

Dodecanenitrile

DODECANENITRILE

3.5

Dodecanenitrile is a synthetic fragrance ingredient that adds a fresh, citrusy scent, but it offers no skincare benefits and may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Solvent

Dodecene

DODECENE

3.0

Dodecene is a lightweight synthetic oil that helps dissolve makeup and sebum without feeling greasy, but it offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincaresolvent
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Solvent

Dodecene Hydroformylation Products

DODECENE HYDROFORMYLATION PRODUCTS

3.5

A synthetic solvent and emollient that helps dissolve other ingredients and provides a lightweight feel, but lacks extensive skin-benefit research.

Irritation

low

Source

synthetic

beautyskincaresolvent
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Film Former

Dodecenyl Oleylsuccinamide

DODECENYL OLEYLSUCCINAMIDE

3.5

A synthetic film-former that helps products resist water and wear longer, but with limited independent safety data.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Dodecenyl Stearylsuccinamide

DODECENYL STEARYLSUCCINAMIDE

3.5

A synthetic film-former that helps products stay put on skin or hair, but offers no active skincare benefit.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Antioxidant

Dodecyl Gallate

DODECYL GALLATE

3.5

Dodecyl gallate is a synthetic antioxidant that helps preserve cosmetic formulas, but it has limited direct skin benefits and may be unnecessary in well-formulated products.

Irritation

low

Source

synthetic

beautyskincareantioxidant
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Antistatic Agent

Dodecylbenzyltrimonium Chloride

Dodecylbenzyltrimonium Chloride

3.5

An effective conditioning and antistatic agent for hair, but can be irritating for sensitive skin or eyes.

Irritation

moderate

Source

synthetic

beautyskincareconditioning agent
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Fragrance Ingredient

Dodecyldihydrofuranone

3-DODECYLDIHYDROFURANONE

3.5

A synthetic fragrance compound that adds a pleasant scent but offers no skincare benefits and may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Emollient

Dodecylhexadecanol

DODECYLHEXADECANOL

3.8

A gentle, synthetic fatty alcohol that softens skin and improves product texture with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Antistatic Agent

Dodecylhexadecyltrimonium Chloride

Dodecylhexadecyltrimonium Chloride

3.5

A synthetic conditioning agent that reduces static and softens hair, but may be irritating or pore-clogging for some skin types.

Irritation

moderate

Source

synthetic

beautyskincarehaircare
Read ingredient review

Emollient

Dodecyltetradecanol

DODECYLTETRADECANOL

4.0

A gentle, non-greasy emollient that softens skin and improves product texture with minimal irritation risk.

Irritation

low

Source

synthetic

beautyskincareemollient
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Preservative

Dodecyltriphenylphosphonium Bromide

Dodecyltriphenylphosphonium Bromide

3.0

An effective preservative but may cause irritation in sensitive individuals; not a common or well-known ingredient in mainstream skincare.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
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Antistatic Agent

Dodecylxylylditrimonium Chloride

Dodecylxylylditrimonium Chloride

3.5

An effective synthetic conditioning agent that reduces static and improves manageability, but may cause irritation for sensitive scalps.

Irritation

moderate

Source

synthetic

beautyskincarehaircare
Read ingredient review

Antioxidant

Dodonaea Microzyga Extract

DODONAEA MICROZYGA LEAF/STEM EXTRACT

3.8

A gentle, antioxidant-rich plant extract that may help calm skin and protect against environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Surfactant

Dodoxynol-12

Dodoxynol-12

3.5

Dodoxynol-12 is a synthetic emulsifier that helps cleanse and stabilize formulas, but it may be slightly drying or irritating for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Dodoxynol-13

Dodoxynol-13

3.8

Dodoxynol-13 is a synthetic cleansing agent that helps remove dirt and oil, but may be slightly drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Dodoxynol-5

Dodoxynol-5

3.5

Dodoxynol-5 is a synthetic cleansing agent that helps remove dirt and oil, but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Dodoxynol-6

Dodoxynol-6

3.5

Dodoxynol-6 is a synthetic cleansing agent that helps remove dirt and oil, but it may be slightly drying or irritating for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Dodoxynol-7

Dodoxynol-7

3.5

Dodoxynol-7 is a synthetic cleansing agent that helps products foam and remove dirt, but it may be slightly drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Dodoxynol-9

DODOXYNOL-9

3.5

A synthetic cleansing agent that helps remove dirt and oil, but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Humectant

Dogfish Skin Extract

SCYLLII PELLIS EXTRACT

3.5

A marine extract that may help hydrate and condition skin, but research is limited and sustainability concerns exist.

Irritation

low

Source

natural

beautyskincarehumectant
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Antioxidant

Dolichos Biflorus Callus Extract

DOLICHOS BIFLORUS CALLUS EXTRACT

3.8

A gentle plant-based antioxidant from horse gram callus that may help calm skin and fight free radicals, but research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Bulking Agent

Dolomite

DOLOMITE

3.5

Dolomite is a safe, natural mineral powder that helps absorb oil and provide gentle physical exfoliation, but it offers no active skincare benefits.

Irritation

low

Source

natural

beautyskincareexfoliant
Read ingredient review

Soothing Agent

Dolomite Ferment Filtrate

Aquaphilus Dolomiae Ferment Filtrate

4.0

A gentle, probiotic-inspired ingredient that helps calm irritation and reinforce the skin's natural defenses.

Irritation

low

Source

biotech

beautyskincaresoothing
Read ingredient review

Preservative

Domiphen Bromide

Domiphen Bromide

3.5

Domiphen Bromide is an effective preservative but can be irritating for sensitive skin, especially in leave-on products.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
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Emollient

Donkey Milk

Donkey Milk

3.8

Donkey milk is a gentle, nutrient-rich moisturizer that may soothe sensitive skin, but scientific evidence for its cosmetic benefits is still limited.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Donkey Milk Extract

DONKEY SKIN EXTRACT

3.8

A gentle, protein-rich ingredient that helps hydrate and soothe the skin, but scientific evidence is still limited.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Soothing Agent

Dotted Smartweed Extract

POLYGONUM PUNCTATUM EXTRACT

3.8

A gentle botanical extract with antioxidant potential, but research is limited and it's not a standout ingredient.

Irritation

low

Source

natural

beautyskincarebotanical
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Fragrance

Douglas Fir Branch Water

Pseudotsuga menziesii branch water

3.8

A gentle, aromatic botanical water that adds a fresh scent and mild skin-conditioning benefits, but lacks strong clinical evidence for specific skincare claims.

Irritation

low

Source

natural

beautyskincarebotanical water
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Fragrance

Douglas Fir Branch/Leaf Oil

Pseudotsuga menziesii branch/leaf oil

3.8

A fragrant essential oil from Douglas fir that adds a woodsy scent and may offer mild antioxidant benefits, but can be irritating for sensitive skin.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Antioxidant

Douglas Fir Wood Extract

Pseudotsuga menziesii wood extract

3.8

A gentle plant-based antioxidant that may help protect skin from environmental stress, though research is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Downy Birch Twig Extract

Betula Pubescens Twig Extract

4.0

A gentle, antioxidant-rich botanical extract that may help calm and protect the skin, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Downy Rose Myrtle Extract

Rhodomyrtus tomentosa flower/leaf/stem extract

3.8

A gentle botanical extract with antioxidant potential, but research in cosmetics is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Draba Alpina Callus Extract

DRABA ALPINA CALLUS CULTURE EXTRACT

3.8

A gentle, lab-grown plant extract that may help protect skin from environmental stress and calm irritation, though human studies are limited.

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review

Antioxidant

Dracaena Cambodiana Leaf Extract

DRACAENA CAMBODIANA LEAF EXTRACT

3.8

A gentle plant extract with antioxidant potential, but research is still early and benefits are not yet proven in human skin.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Dracaena Marginata Extract

DRACAENA MARGINATA LEAF/STEM EXTRACT

3.5

A gentle plant extract with antioxidant potential, but research is limited and benefits are not yet well-established in human skin.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Dracaena Sanderiana Extract

DRACAENA SANDERIANA LEAF/STEM EXTRACT

3.5

A gentle plant extract with antioxidant potential, but research on its skincare benefits is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Dracocephalum Extract

Dracocephalum Heterophyllum Flower/Leaf/Stem Extract

3.8

A gentle botanical extract with antioxidant potential, but research on its skincare benefits is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Soothing agent

Dracontium Longipes Extract

Dracontium Longipes Extract

3.5

A gentle Amazonian plant extract with potential soothing and antioxidant benefits, but research is still early.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Dragon Fruit Bud Extract

Selenicereus monacanthus bud extract

3.8

A gentle, plant-based antioxidant extract that may help calm and protect skin, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Dragon Fruit Extract

Hylocereus Undatus Extract

4.0

Dragon Fruit Extract is a gentle, antioxidant-rich ingredient that helps hydrate and protect the skin, though research on its topical benefits is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Dragon Fruit Juice

Hylocereus Undatus Fruit Juice

3.8

A gentle, water-based ingredient that adds light hydration and antioxidant protection, but its benefits are not as well-studied as more common fruit extracts.

Irritation

low

Source

natural

beautyskincarehumectant
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UV Absorber

Drometrizole

Drometrizole

4.0

Drometrizole is a synthetic UV filter that helps protect skin from sun damage, but it is less common in the US than in Europe.

Irritation

low

Source

synthetic

beautyskincaresunscreen
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UV Filter

Drometrizole Trisiloxane

Drometrizole Trisiloxane

4.5

A highly effective, photostable sunscreen ingredient that provides broad-spectrum protection without leaving a white cast.

Irritation

low

Source

synthetic

beautyskincaresunscreen
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Antioxidant

Drumstick Primula Leaf Extract

Primula Denticulata Leaf Extract

3.5

A gentle botanical extract with antioxidant potential, but research on its specific benefits in skincare is still limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Dryas Octopetala Callus Extract

Dryas Octopetala Callus Culture Extract

4.0

A gentle, lab-grown plant extract that may help calm skin and fight free radical damage, though research is still early.

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review

Soothing agent

Duboisia Leaf Extract

DUBOISIA LEICHHARDTII LEAF EXTRACT

3.5

A gentle botanical extract with potential soothing and antioxidant benefits, but research is limited and it may be unfamiliar to many consumers.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Skin conditioning agent

Duck Embryo Extract

DUCK EMBRYO EXTRACT

3.5

Duck embryo extract is a novel, protein-rich ingredient that may support skin hydration and texture, but scientific evidence is limited.

Irritation

low

Source

natural

beautyskincareconditioning agent
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Emollient

Duck Fat

Anas Platyrhynchos Oil

3.5

Duck fat is a rich emollient that can deeply moisturize dry skin, but its moderate comedogenic rating means it may clog pores for some people.

Irritation

low

Source

natural

beautyskincareemollient
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Humectant

Dulse Seaweed Extract

Dilsea Carnosa Extract

4.0

A gentle, hydrating seaweed extract that may help soothe and protect the skin, but research is still emerging.

Irritation

low

Source

natural

beautyskincarehumectant
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Antioxidant

Dunalianum Blueberry Leaf Extract

VACCINIUM DUNALIANUM LEAF EXTRACT

4.0

A gentle, antioxidant-rich leaf extract from a wild blueberry species that may help calm skin and defend against environmental stress.

Irritation

low

Source

natural

beautyskincareantioxidant
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