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 4,092
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

Antioxidant

Dendropanax Leaf Extract

DENDROPANAX MORBIFERUS LEAF EXTRACT

3.8

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

Irritation

low

Source

natural

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Antioxidant

Dendropanax Morbiferus Callus Extract

DENDROPANAX MORBIFERUS CALLUS CULTURE EXTRACT

4.0

A plant-based, lab-grown extract that may help protect skin from environmental stress and calm irritation, though research is still emerging.

Irritation

low

Source

biotech

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Antioxidant

Dendropanax Root Extract

DENDROPANAX MORBIFERUS ADVENTITIOUS ROOT EXTRACT

3.8

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

Irritation

low

Source

natural

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Antioxidant

Deodar Cedar Seed Extract

Cedrus Deodara Seed Extract

3.8

A gentle, antioxidant-rich plant extract that may help calm skin and fight free radical damage, though more human studies are needed.

Irritation

low

Source

natural

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Antioxidant

Deodar Cedar Wood Extract

Cedrus Deodara Wood Extract

3.8

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

Irritation

low

Source

natural

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Humectant

Desert Algae Extract

Scenedesmus deserticola extract

4.0

A gentle, hydrating algae extract that helps skin retain moisture and defends against environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincarehumectantantioxidant
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Antioxidant

Desert Algae Ferment Extract

Scenedesmus Deserticola Ferment Extract

4.0

A gentle, antioxidant-rich algae ferment that helps hydrate and protect skin from environmental stress.

Irritation

low

Source

natural

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Antioxidant

Desert Gourd Seed Extract

BAILEYA MULTIRADIATA SEED EXTRACT

3.8

A gentle, plant-based antioxidant extract that may help calm skin and fight free radical damage, though research is still limited.

Irritation

low

Source

natural

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Antioxidant

Desert Lime Fruit Extract

Citrus Glauca Fruit Extract

4.0

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

Irritation

low

Source

natural

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Antioxidant

Desert Rose Callus Extract

Adenium Obesum Callus Culture Extract

3.8

A gentle, plant-derived antioxidant that may help soothe skin and fight environmental stress, though research is still early.

Irritation

low

Source

natural

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Antioxidant

Desert Rose Leaf Cell Extract

ADENIUM OBESUM LEAF CELL EXTRACT

3.8

A gentle, lab-grown plant cell extract that may help protect skin from environmental stress, but research is still early.

Irritation

low

Source

biotech

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Antioxidant

Desert Willow Bark Extract

Cercidium Floridum Bark Extract

3.8

A gentle botanical extract that may help calm skin and fight free radicals, but research is still early.

Irritation

low

Source

natural

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Antioxidant

Detonula Pumila Extract

Detonula Pumila Extract

3.8

A gentle marine extract that may help calm skin and fight environmental stress, but research is still early.

Irritation

low

Source

natural

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Antioxidant

Deutzia Gracilis Extract

DEUTZIA GRACILIS LEAF/STEM EXTRACT

3.5

A gentle botanical extract with antioxidant potential, but research is limited—consider it a nice-to-have rather than a must-have ingredient.

Irritation

low

Source

natural

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Antioxidant

Devil's Seaweed Extract

Laminaria Diabolica Extract

3.8

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

Irritation

low

Source

natural

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Antioxidant

Diacetyl Boldine

DIACETYL BOLDINE

4.0

A gentle antioxidant derived from boldo tree extract that may help calm skin and fight free radical damage.

Irritation

low

Source

semi-synthetic

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Antioxidant

Diacetyl Resveratryl Thioctate

DIACETYLRESVERATRYL THIOCTATE

3.8

A hybrid antioxidant that pairs resveratrol with alpha-lipoic acid for enhanced stability and skin penetration, but clinical research is still limited.

Irritation

low

Source

semi-synthetic

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Antioxidant

Diacetylcurcumin

Diacetylcurcumin

3.8

A stable, potent antioxidant derived from turmeric that may help brighten skin and fight free radicals, but human studies are limited.

Irritation

low

Source

semi-synthetic

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Antioxidant

Diamylhydroquinone

Diamylhydroquinone

3.5

Diamylhydroquinone is a synthetic antioxidant that helps keep oils and lip products from going rancid, but it's not a star active for skin benefits.

Irritation

low

Source

synthetic

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Antioxidant

Dictyota Coriacea Extract

Dictyota Coriacea Extract

3.8

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

Irritation

low

Source

natural

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Antioxidant

Diethyl Ketoglutarate

DIETHYL KETOGLUTARATE

3.5

A synthetic antioxidant that may help protect skin from environmental stress, but research is still early and benefits are not yet proven in human studies.

Irritation

low

Source

synthetic

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Skin Conditioning Agent

Difluorophenyl Propylcyclopentene Oxime

DIFLUOROPHENYL PROPYLCYCLOPENTENE OXIME

3.5

A synthetic ingredient with limited research; may offer antioxidant benefits but lacks strong evidence for efficacy or safety.

Irritation

low

Source

synthetic

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Antioxidant

Diglucosyl Gallic Acid

Diglucosyl Gallic Acid

4.0

A gentle, stabilized antioxidant that helps brighten skin and protect against environmental damage without the irritation of pure gallic acid.

Irritation

low

Source

semi-synthetic

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Antioxidant

Dihydroeugenol

Dihydroeugenol

4.0

Dihydroeugenol is a gentle antioxidant that helps protect skin from environmental stress while offering mild conditioning benefits.

Irritation

low

Source

natural

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Antioxidant

Dihydrogeranylidene-Bis-Indole

Dihydrogeranylidene-Bis-Indole

3.5

A synthetic compound with early research suggesting antioxidant and soothing benefits, but more studies are needed to confirm its efficacy in skincare.

Irritation

low

Source

synthetic

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Antioxidant

Dihydromyricetin

Dihydromyricetin

4.0

A plant-derived antioxidant that helps calm skin and defend against environmental stress, with emerging research for anti-aging benefits.

Irritation

low

Source

natural

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Antioxidant

Dihydroquercetin

Dihydroquercetin

4.3

A powerful plant-based antioxidant that helps defend skin against pollution and UV damage, with a good safety profile.

Irritation

low

Source

natural

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Antioxidant

Dihydroquercetin Dithiolanepentyl Ether

DIHYDROQUERCETIN DITHIOLANEPENTYL ETHER

3.8

A novel antioxidant that combines two well-known skin protectors, but research is still early and it may not be widely available in consumer products yet.

Irritation

low

Source

semi-synthetic

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Antioxidant

Dihydroquercetin Pentacaprylate

DIHYDROQUERCETIN PENTACAPRYLATE

4.0

A potent, oil-soluble antioxidant that may help protect skin from environmental damage and support a more even tone.

Irritation

low

Source

semi-synthetic

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Antioxidant

Dihydroquercetin Tetracaprylate

DIHYDROQUERCETIN TETRACAPRYLATE

4.0

A potent, oil-friendly antioxidant that helps defend skin against pollution and UV damage without the stability issues of pure dihydroquercetin.

Irritation

low

Source

semi-synthetic

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Antioxidant

Dihydroxy Dimethyl Pyridine

2,6-DIHYDROXY-3,4-DIMETHYLPYRIDINE

3.5

A synthetic antioxidant that may help protect skin from environmental stress, but research is still limited.

Irritation

low

Source

synthetic

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Antioxidant

Dihydroxy Methylchromonyl Palmitate

Dihydroxy Methylchromonyl Palmitate

4.0

A synthetic antioxidant that helps shield skin from pollution and UV damage while supporting a brighter, more even complexion.

Irritation

low

Source

synthetic

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Antioxidant

Dihydroxydimethoxychalcone

Dihydroxydimethoxychalcone

4.0

A gentle antioxidant from the chalcone family that may help calm skin and defend against pollution and UV damage.

Irritation

low

Source

natural

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Antioxidant

Dihydroxymethoxy Dihydrochalcone

Dihydroxymethoxy Dihydrochalcone

4.0

A gentle synthetic antioxidant that helps brighten skin and fight signs of aging, with a good safety profile for most skin types.

Irritation

low

Source

synthetic

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Antioxidant

Dilauroyl 3-Glyceryl Ascorbate

Dilauroyl 3-Glyceryl Ascorbate

4.3

A gentle, stable vitamin C derivative that brightens skin and fights free radicals without the sting or instability of pure ascorbic acid.

Irritation

low

Source

semi-synthetic

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Antioxidant

Dilauryl Thiodipropionate

DILAURYL THIODIPROPIONATE

3.5

A synthetic stabilizer that helps keep oils fresh, but it's not a star active for skin benefits.

Irritation

low

Source

synthetic

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Antioxidant

Dill Extract

Peucedanum graveolens extract

3.8

Dill extract offers mild antioxidant and soothing benefits, but research on its cosmetic efficacy is still limited.

Irritation

low

Source

natural

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Antioxidant

Dimethoxy Di-P-Cresol

Dimethoxy Di-P-Cresol

3.8

A synthetic antioxidant that may help protect skin from environmental damage, but research is still emerging.

Irritation

low

Source

synthetic

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Antioxidant

Dimethoxyapigenin

Dimethoxyapigenin

3.8

A synthetic antioxidant that may help calm skin and fight free radicals, but research is still limited.

Irritation

low

Source

synthetic

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Antioxidant

Dimethoxyphenyl Dimethyl Pentanedione

1-(3,4-DIMETHOXYPHENYL)-4,4-DIMETHYL-1,3-PENTANEDIONE

3.5

A synthetic antioxidant that may help protect skin from environmental stress, but research is still early and benefits are not yet proven in human studies.

Irritation

low

Source

synthetic

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Antioxidant

Dimethylhydroquinone

Dimethylhydroquinone

3.5

A synthetic antioxidant that helps protect skin from environmental damage, but research on its topical benefits is still limited compared to more studied antioxidants like vitamin C or E.

Irritation

low

Source

synthetic

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Antioxidant

Dimethylmethoxy Chromanol

Dimethylmethoxy Chromanol

4.0

A stable synthetic antioxidant that mimics natural vitamin E to protect skin from pollution and UV damage without irritation.

Irritation

low

Source

synthetic

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Antioxidant

Dimorphandra Mollis Pod Extract

DIMORPHANDRA MOLLIS POD EXTRACT

4.0

A gentle, plant-derived antioxidant that helps protect skin from environmental stress while offering mild soothing benefits.

Irritation

low

Source

natural

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Antioxidant

Dimyristoyl Glyceryl Ascorbate

Dimyristoyl Glyceryl Ascorbate

4.3

A gentle, stable vitamin C derivative that brightens skin and fights free radicals without the irritation of pure L-ascorbic acid.

Irritation

low

Source

semi-synthetic

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Antioxidant

Dimyristyl Thiodipropionate

DIMYRISTYL THIODIPROPIONATE

3.8

A gentle synthetic antioxidant that helps keep oils and butters in your skincare products fresh and stable.

Irritation

low

Source

synthetic

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Antioxidant

Diosmin

DIOSMIN

3.8

Diosmin is a plant-derived flavonoid that helps protect skin from oxidative stress and may reduce puffiness, but research in topical skincare is still emerging.

Irritation

low

Source

natural

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Antioxidant

Dipalmitoyl Glutathione

Dipalmitoyl Glutathione

4.0

A stabilized, fat-soluble glutathione that may help brighten skin and fight oxidative stress, but human evidence is still limited.

Irritation

low

Source

semi-synthetic

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Antioxidant

Dipterocarpus Intricatus Extract

Dipterocarpus Intricatus 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

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Antioxidant

Disodium Ascorbyl Sulfate

Disodium Ascorbyl Sulfate

4.0

A gentle, stable form of vitamin C that brightens skin and fights free radicals with minimal irritation.

Irritation

low

Source

semi-synthetic

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Antioxidant

Disodium Cupric Citrate

DISODIUM CUPRIC CITRATE

4.0

A gentle copper complex that helps defend skin from environmental stress and supports a healthy-looking complexion.

Irritation

low

Source

semi-synthetic

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Antioxidant

Disodium EDTA-Copper

DISODIUM EDTA-COPPER

3.8

A copper-infused version of EDTA that offers antioxidant benefits and supports skin repair, but is less studied than other copper forms.

Irritation

low

Source

synthetic

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