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 2,268
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

Coconut Oil

Cocos Nucifera Oil

3.8

Coconut oil is a rich emollient that softens skin but may clog pores for some people, making it best for dry or normal skin types.

Irritation

low

Source

natural

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Emollient

Coconut Oil Decyl Esters

Coconut Oil Decyl Esters

4.3

A lightweight, non-greasy emollient derived from coconut oil that hydrates and softens skin without clogging pores.

Irritation

low

Source

natural

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Emollient

Coconut Oil Ethyl Esters

Cocos Nucifera (Coconut) Oil Ethyl Esters

4.0

A lightweight, non-greasy emollient derived from coconut oil that softens skin without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Coconut Seed Butter

Cocos Nucifera Seed Butter

4.0

Coconut seed butter is a deeply moisturizing natural emollient, but its moderate comedogenic rating means it may clog pores for some people.

Irritation

low

Source

natural

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Emollient

Coconut/Palm Kernel Alkanes

COCONUT/PALM KERNEL ALKANES

4.5

A silky, plant-based alternative to silicones that hydrates without greasiness and is well-tolerated by most skin types.

Irritation

low

Source

natural

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Emollient

Cod Liver Oil

GADUS MORRHUA LIVER OIL

4.0

Cod liver oil is a nourishing emollient rich in omega-3s and vitamins that can help soothe dry, rough skin, but its strong scent and potential for oxidation require careful formulation.

Irritation

low

Source

natural

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Emollient

Coelastrella vacuolata Oil

COELASTRELLA VACUOLATA OIL

3.8

A gentle, algae-derived oil that helps soften skin and provides antioxidant protection, though research is still early.

Irritation

low

Source

natural

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Emollient

Coffee Seed Oil PEG-8 Esters

COFFEA ARABICA SEED OIL PEG-8 ESTERS

3.8

A gentle, semi-synthetic emollient that combines coffee seed oil with PEG for improved texture and stability.

Irritation

low

Source

semi-synthetic

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Emollient

Cognac Oil

Vitis Vinifera (Grape) Seed Oil

4.2

A lightweight, non-comedogenic oil that hydrates and provides antioxidant protection without clogging pores.

Irritation

low

Source

natural

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Emollient

Cohune Seed Oil

Orbignya Cohune Seed Oil

4.0

A gentle, non-greasy plant oil that hydrates and softens skin without clogging pores, suitable for most skin types.

Irritation

low

Source

natural

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Emollient

Coix Seed Oil

COIX LACRYMA-JOBI MA-YUEN BRAN OIL

4.0

Coix Seed Oil is a gentle, plant-based oil that hydrates and soothes skin without clogging pores, making it a good choice for sensitive or oily skin types.

Irritation

low

Source

natural

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Emollient

Corn Glycerides

CORN GLYCERIDES

4.0

Corn Glycerides are a gentle, plant-derived emollient that helps soften and smooth the skin without clogging pores.

Irritation

low

Source

natural

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Emollient

Corn Oil PEG-8 Esters

CORN OIL PEG-8 ESTERS

3.8

A gentle, plant-derived emulsifier that helps blend oil and water while softening skin — generally well-tolerated but processed with PEG, which some prefer to avoid.

Irritation

low

Source

semi-synthetic

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Emollient

Corn Oil Unsaponifiables

ZEA MAYS OIL UNSAPONIFIABLES

4.0

A gentle, plant-derived emollient that supports the skin barrier and helps lock in moisture without clogging pores.

Irritation

low

Source

natural

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Emollient

Cottonseed Glyceride

COTTONSEED GLYCERIDE

4.0

A gentle, plant-derived emollient that helps moisturize and soften skin without clogging pores.

Irritation

low

Source

natural

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Emollient

Cranberry Seed Oil

VACCINIUM MACROCARPON SEED OIL

4.2

Cranberry seed oil is a lightweight, antioxidant-rich oil that hydrates and helps protect skin from environmental stress without clogging pores.

Irritation

low

Source

natural

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A generic cream base is a common cosmetic vehicle that delivers active ingredients but its specific effects depend entirely on the formula.

Irritation

low

Source

mixed

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Emollient

Crinum Zeylanicum Oil

Crinum Zeylanicum Oil

3.5

A gentle, plant-based oil that softens skin but has limited research and a moderate chance of clogging pores for some people.

Irritation

low

Source

natural

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Emollient

Crocodile Oil

CROCODYLUS SPP. OIL

3.8

Crocodile oil is a rich emollient that may help soothe dry or irritated skin, but research on its benefits is still limited.

Irritation

low

Source

natural

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Emollient

Croton Megalocarpus Seed Oil

Croton Megalocarpus Seed Oil

3.5

A natural emollient oil from an African tree, but with limited research and a moderate chance of clogging pores for some skin types.

Irritation

low

Source

natural

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Emollient

Croton Sonderianus Oil

Croton Sonderianus Leaf/Stem Oil

3.5

A gentle plant oil with antioxidant potential, but research is limited and it may be mildly comedogenic for some skin types.

Irritation

low

Source

natural

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Emollient

Cucumber Seed Oil

Cucumis Sativus (Cucumber) Seed Oil

4.0

Cucumber seed oil is a gentle, non-greasy moisturizer rich in essential fatty acids and vitamin E, ideal for dry or sensitive skin.

Irritation

low

Source

natural

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Emollient

Cuphea Seed Oil

CUPHEA LANCEOLATA/VISCOSISSIMA SEED OIL

4.0

A lightweight, non-greasy plant oil that hydrates and softens skin without clogging pores—great for oily or combination skin types.

Irritation

low

Source

natural

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Emollient

Cupuacu Butter

THEOBROMA GRANDIFLORUM SEED BUTTER

4.3

A deeply nourishing plant butter that hydrates and softens skin without feeling greasy, ideal for dry or sensitive skin.

Irritation

low

Source

natural

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Emollient

Cupuaçu Butter Extract

THEOBROMA GRANDIFLORUM SEED BUTTER EXTRACT

4.3

A deeply nourishing plant butter that hydrates and softens skin without feeling greasy.

Irritation

low

Source

natural

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Emollient

Cupuaçu Butter Glycerides

THEOBROMA GRANDIFLORUM SEED BUTTER GLYCERIDES

4.0

A gentle, semi-synthetic emollient derived from cupuaçu butter that softens skin without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Cupuaçu Butter Glyceryl Esters

THEOBROMA GRANDIFLORUM SEED BUTTER GLYCERYL ESTERS

4.3

A gentle, semi-synthetic emollient derived from cupuaçu butter that softens and smooths skin without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Cupuacu Butter PEG-8 Esters

THEOBROMA GRANDIFLORUM SEED BUTTER PEG-8 ESTERS

4.0

A gentle, water-friendly emollient that brings the richness of cupuacu butter into lightweight, rinse-off and leave-on products.

Irritation

low

Source

semi-synthetic

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Emollient

Cupuacu Butter Polyglyceryl-6 Esters

THEOBROMA GRANDIFLORUM SEED BUTTER POLYGLYCERYL-6 ESTERS

4.3

A gentle, non-greasy emollient derived from cupuacu butter that helps soften and smooth skin without clogging pores.

Irritation

low

Source

semi-synthetic

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Skin conditioning agent

Cyclocarboxypropyloleic Acid

CYCLOCARBOXYPROPYLOLEIC ACID

4.0

A synthetic lipid that mimics natural skin fats to support the moisture barrier, with early research suggesting it may help reduce water loss and improve skin comfort.

Irritation

low

Source

synthetic

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Emollient

Cyclohexadecanol

CYCLOHEXADECANOL

3.8

A gentle synthetic emollient that improves product feel and spreadability without common irritation.

Irritation

low

Source

synthetic

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Emollient

Cyclohexanediol Dicaprylate

Cyclohexanediol Dicaprylate

4.0

A lightweight synthetic emollient that softens skin without clogging pores, ideal for oily or combination skin types.

Irritation

low

Source

synthetic

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Emollient

Cyclooctyl Methyl Carbonate

Cyclooctyl Methyl Carbonate

3.8

A lightweight synthetic emollient that helps products glide on smoothly without a greasy feel, but research on long-term skin benefits is still limited.

Irritation

low

Source

synthetic

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Emollient

Cynara Cardunculus Seed Oil

Cynara Cardunculus Seed Oil

4.0

A gentle, plant-based oil that hydrates and softens skin without clogging pores, with some antioxidant benefits.

Irritation

low

Source

natural

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Emollient

Dalea Spinosa Seed Oil

DALEA SPINOSA SEED OIL

4.0

A gentle, plant-based oil that hydrates and helps protect the skin barrier without feeling greasy.

Irritation

low

Source

natural

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Solvent

Decane

DECANE

3.5

Decane is a safe, lightweight emollient that helps products glide on smoothly without clogging pores, but it offers no active skincare benefits.

Irritation

low

Source

synthetic

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Emollient

Decene

DECENE

3.5

Decene is a lightweight synthetic emollient that helps soften skin and improve product texture, but it offers no active benefits beyond surface feel.

Irritation

low

Source

synthetic

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Emollient

Decyl Acetate

DECYL ACETATE

4.0

Decyl acetate is a lightweight, non-greasy emollient that softens skin without clogging pores, making it a good choice for oily or acne-prone skin types.

Irritation

low

Source

synthetic

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Emollient

Decyl Alcohol

Decyl Alcohol

3.8

A gentle fatty alcohol that helps soften skin and stabilize formulas without the drying effects of short-chain alcohols.

Irritation

low

Source

synthetic

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Emollient

Decyl Castorate

Decyl Castorate

4.3

A lightweight, non-greasy emollient derived from castor oil that hydrates and softens skin with a silky finish.

Irritation

low

Source

semi-synthetic

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Emollient

Decyl Cocoate

Decyl Cocoate

4.5

A lightweight, plant-based emollient that hydrates and softens skin without clogging pores.

Irritation

low

Source

natural

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Emollient

Decyl Hempseedate

DECYL HEMPSEEDATE

4.0

A lightweight, non-greasy emollient that softens skin without clogging pores, with a touch of hemp-derived fatty acid benefits.

Irritation

low

Source

semi-synthetic

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Emollient

Decyl Isostearate

DECYL ISOSTEARATE

4.0

A lightweight synthetic emollient that softens skin without a greasy feel, generally well-tolerated and non-comedogenic.

Irritation

low

Source

synthetic

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Emollient

Decyl Isovalerate

Decyl Isovalerate

4.0

A lightweight, non-greasy emollient that softens skin without clogging pores.

Irritation

low

Source

synthetic

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Emollient

Decyl Jojobate

Decyl Jojobate

4.5

A lightweight, non-greasy emollient derived from jojoba oil that softens skin without clogging pores.

Irritation

low

Source

natural

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Emollient

Decyl Laurate

Decyl Laurate

4.3

A lightweight, non-greasy emollient that hydrates and softens skin while being gentle enough for sensitive and acne-prone types.

Irritation

low

Source

natural

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Emollient

Decyl Methyl Ether

DECYL METHYL ETHER

4.0

A lightweight synthetic emollient that helps products glide on smoothly without a greasy feel, generally well-tolerated by most skin types.

Irritation

low

Source

synthetic

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Emollient

Decyl Myristate

Decyl Myristate

3.8

Decyl Myristate is a lightweight emollient that softens skin, but it may clog pores for those prone to breakouts.

Irritation

low

Source

synthetic

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Emollient

Decyl Oleate

Decyl Oleate

4.0

Decyl Oleate is a silky, non-greasy emollient that helps moisturizers spread easily, but it may clog pores for acne-prone skin.

Irritation

low

Source

semi-synthetic

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Emollient

Decyl Olivate

Decyl Olivate

4.3

A gentle, olive-derived emollient that hydrates and smooths skin without clogging pores, ideal for sensitive and oily skin types.

Irritation

low

Source

natural

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Emollient

Decyl Palmitate

Decyl Palmitate

4.0

Decyl Palmitate is a lightweight, non-greasy emollient that softens skin and improves product texture, with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

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Emollient

Decyl Propionate

Decyl Propionate

4.0

A lightweight, non-greasy emollient that hydrates and softens skin with a silky finish.

Irritation

low

Source

synthetic

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Emollient

Decyl Succinate

Decyl Succinate

4.0

Decyl Succinate is a gentle, lightweight emollient that helps soften skin and improve product feel without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Decyl Vinyl Ether

DECYL VINYL ETHER

3.5

A synthetic emollient that helps products spread smoothly and resist wash-off, but lacks extensive safety data in cosmetics.

Irritation

low

Source

synthetic

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