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

C20-40 Alkyl Stearate

C20-40 Alkyl Stearate

4.0

A gentle, waxy emollient that improves product texture and skin feel without common irritation or clogging concerns.

Irritation

low

Source

synthetic

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Emollient

C20-40 Isoparaffin

C20-40 Isoparaffin

3.8

A gentle, non-greasy emollient that helps products spread smoothly and feel lightweight on the skin.

Irritation

low

Source

synthetic

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Emollient

C21-28 Alkane

C21-28 Alkane

4.0

A gentle, plant-derived emollient that provides a silky, non-greasy feel — great for sensitive or oily skin types.

Irritation

low

Source

natural

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Emollient

C21-C28 Alkane

C21-C28 Alkane

4.3

A gentle, plant-derived emollient that provides a silky feel without clogging pores or causing irritation.

Irritation

low

Source

natural

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Emollient

C24-28 Alkyl Dimethicone

C24-28 Alkyl Dimethicone

4.2

A gentle silicone that smooths and softens skin without clogging pores, ideal for dry or sensitive types.

Irritation

low

Source

synthetic

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Emollient

C24-28 Olefin

C24-28 OLEFIN

3.5

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

Irritation

low

Source

synthetic

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Emollient

C24-30 Olefin

C24-30 Olefin

3.5

A synthetic emollient that helps products feel smooth and spread easily, with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

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Emollient

C26-28 Alkyl Methicone

C26-28 ALKYL METHICONE

4.0

A gentle silicone emollient that leaves skin feeling smooth and silky without clogging pores, ideal for improving product texture.

Irritation

low

Source

synthetic

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Emollient

C26-54 Olefin

C26-54 OLEFIN

3.8

A safe, non-greasy emollient that helps products spread smoothly and feel silky on the skin.

Irritation

low

Source

synthetic

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Emollient

C28-36 Olefin

C28-36 OLEFIN

4.0

A gentle, non-greasy emollient that softens skin and improves product feel without clogging pores.

Irritation

low

Source

synthetic

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Emollient

C30-45 Alkyl Dimethicone

C30-45 Alkyl Dimethicone

4.0

A gentle silicone that helps products glide on smoothly and leaves skin feeling soft without clogging pores.

Irritation

low

Source

synthetic

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Emollient

C30-45 Alkyl Methicone

C30-45 Alkyl Methicone

4.3

A gentle, non-greasy silicone that smooths skin and helps products glide on effortlessly — generally well-tolerated by most skin types.

Irritation

low

Source

synthetic

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Emollient

C30-45 Olefin

C30-45 OLEFIN

3.5

A gentle, non-greasy emollient that helps products spread smoothly and leaves skin feeling soft without clogging pores.

Irritation

low

Source

synthetic

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Emollient

C30-50 Alkyl Beeswax

C30-50 ALKYL BEESWAX

4.0

A gentle, synthetic wax that improves product texture and stability without the variability of natural beeswax.

Irritation

low

Source

semi-synthetic

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Emollient

C30-50 Alkyl Stearate

C30-50 ALKYL STEARATE

4.0

A gentle, non-greasy wax ester that helps skincare and makeup feel smooth and stay put without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

C30-50 Alkyl/Octyldodecyl Citrate

C30-50 ALKYL/OCTYLDODECYL CITRATE

4.0

A gentle, non-greasy emollient that improves product feel and skin softness with a very low risk of irritation or clogged pores.

Irritation

low

Source

semi-synthetic

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Emollient

C32 Alkyl Dimethicone

C32 Alkyl Dimethicone

4.2

C32 Alkyl Dimethicone is a gentle silicone emollient that helps products glide on smoothly and leaves skin feeling soft without clogging pores.

Irritation

low

Source

synthetic

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Emollient

C32-36 Isoalkyl Acid

C32-36 ISOALKYL ACID

3.8

A gentle, synthetic fatty acid blend that helps soften and smooth skin without clogging pores, making it a safe choice for most skin types.

Irritation

low

Source

synthetic

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Emollient

C32-36 Isoalkyl Stearate

C32-36 ISOALKYL STEARATE

4.0

A gentle, synthetic emollient that provides a silky feel without clogging pores, making it a good option for sensitive and oily skin types.

Irritation

low

Source

synthetic

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Emollient

C4-5 Isoalkyl Cocoate

C4-5 Isoalkyl Cocoate

4.0

A lightweight, coconut-derived emollient that softens skin without clogging pores, making it a good choice for oily or combination skin types.

Irritation

low

Source

synthetic

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Emollient

C40-60 Alcohols

C40-60 Alcohols

4.0

A gentle, non-irritating wax-like ingredient that helps thicken and stabilize products without clogging pores.

Irritation

low

Source

synthetic

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Emollient

C40-60 Alkyl Stearate

C40-60 Alkyl Stearate

4.0

A gentle, non-greasy wax ester that gives products a smooth, silky feel without clogging pores.

Irritation

low

Source

synthetic

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Emollient

C6-14 Polyolefin

POLY(C6-14 OLEFIN)

4.0

A safe, non-greasy synthetic oil that helps products glide on smoothly without clogging pores.

Irritation

low

Source

synthetic

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Emollient

C8-12 Acid Triglyceride

C8-12 Acid Triglyceride

4.3

A gentle, non-greasy emollient that hydrates and smooths skin, ideal for sensitive and oily skin types.

Irritation

low

Source

natural

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Emollient

C9-11 Isoparaffin

C9-11 Isoparaffin

3.8

A lightweight, non-greasy emollient that helps products spread smoothly and evaporates quickly, leaving a silky feel.

Irritation

low

Source

synthetic

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Emollient

C9-12 Alkane

C9-12 Alkane

4.0

A lightweight, non-greasy emollient that helps products spread smoothly and leaves a silky finish without clogging pores.

Irritation

low

Source

synthetic

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Emollient

C9-16 Alkane/Cycloalkane

C9-16 Alkane/Cycloalkane

4.0

A lightweight, silicone-like emollient that spreads easily and evaporates quickly, leaving a non-greasy feel.

Irritation

low

Source

synthetic

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Emollient

Calendula Seed Oil

Calendula Officinalis Seed Oil

4.0

A gentle, non-greasy oil that helps calm and soften skin, ideal for sensitive or irritated complexions.

Irritation

low

Source

natural

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Emollient

California Nutmeg Oil

Torreya californica oil

3.8

A gentle, plant-based oil that hydrates and soothes, but research on its specific benefits is still limited.

Irritation

low

Source

natural

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Emollient

Callitris Seed Oil

CALLITRIS COLUMELLARIS SEED OIL

3.8

A gentle, plant-based oil that helps soften and condition skin with a light feel, though research on its specific benefits is still limited.

Irritation

low

Source

natural

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Emollient

Calodendrum Capense Nut Oil

CALODENDRUM CAPENSE NUT OIL

4.3

A gentle, fast-absorbing oil rich in essential fatty acids and antioxidants that hydrates without clogging pores.

Irritation

low

Source

natural

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Emollient

Camelina Seed Oil Ethyl Esters

CAMELINA SATIVA SEED OIL ETHYL ESTERS

4.0

A silky, non-greasy oil alternative that hydrates and softens skin, suitable for most skin types including oily and acne-prone.

Irritation

low

Source

natural

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Emollient

Camellia & Palm Amino Esters

CAMELLIA SINENSIS SEED OIL/PALM OIL AMINOPROPANEDIOL ESTERS

4.0

A gentle, semi-synthetic emollient that combines the nourishing properties of camellia and palm oils with improved stability and feel.

Irritation

low

Source

semi-synthetic

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Emollient

Camellia Ferment Oil

Bacillus/Camellia Japonica Seed Ferment Oil

4.0

A fermented camellia oil that may improve skin hydration and barrier strength, but research is still early.

Irritation

low

Source

biotech

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Emollient

Camellia Japonica Amino Lipid Complex

CAMELLIA JAPONICA SEED OIL AMINOPROPANEDIOL AMIDES/ESTERS

4.0

A gentle, semi-synthetic emollient derived from camellia oil that helps soften and condition skin with low irritation potential.

Irritation

low

Source

semi-synthetic

beautyskincareemollientconditioning agent
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Emollient

Camellia Japonica Seed Oil

CAMELLIA JAPONICA SEED OIL

4.3

A lightweight, non-greasy oil that deeply moisturizes and soothes without clogging pores—great for dry or sensitive skin.

Irritation

low

Source

natural

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Emollient

Camellia Japonica Seed Oil Ethyl Esters

CAMELLIA JAPONICA SEED OIL ETHYL ESTERS

4.0

A lightweight, non-greasy emollient derived from camellia oil, ideal for those who want the benefits of a natural oil without the heavy feel.

Irritation

low

Source

semi-synthetic

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Emollient

Camellia Leaf Extract Esters

CAPRYLIC/CAPRIC/CAMELLIA SINENSIS LEAF EXTRACT ESTERS

4.0

A gentle, semi-synthetic emollient that combines fatty acids with green tea antioxidants for soothing hydration.

Irritation

low

Source

semi-synthetic

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Emollient

Camellia Oleifera Seed Oil

Camellia Oleifera Seed Oil / Hydrogenated Camellia Oleifera Seed Oil Esters

4.3

A gentle, non-greasy oil that hydrates and soothes, suitable for most skin types including sensitive and oily skin.

Irritation

low

Source

natural

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Emollient

Camellia Reticulata Seed Oil

CAMELLIA RETICULATA SEED OIL

4.3

A gentle, non-greasy oil that hydrates and softens skin without clogging pores, making it a great choice for sensitive or acne-prone skin types.

Irritation

low

Source

natural

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Emollient

Camellia Seed Oil

CAMELLIA CHEKIANGOLEOSA SEED OIL

4.3

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

Irritation

low

Source

natural

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Emollient

Camellia Seed Oil Amides/Ester

CAMELLIA SINENSIS SEED OIL AMINOPROPANEDIOL AMIDES/ESTERS

4.0

A gentle, semi-synthetic emollient derived from green tea seed oil that helps soften and condition skin without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Camellia Seed Oil Esters

Camellia Seed Oil/Hydrogenated Camellia Seed Oil Esters

4.3

A gentle, semi-solid emollient that locks in moisture without feeling greasy, ideal for dry or sensitive skin.

Irritation

low

Source

semi-synthetic

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Emollient

Cananga Flower Wax

Cananga Odorata Flower Wax

4.0

A gentle, naturally fragrant wax that softens skin and adds a subtle floral scent, but may not suit those sensitive to fragrance.

Irritation

low

Source

natural

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Emollient

Canarium Indicum Seed Oil

Canarium Indicum Seed Oil

4.3

A nourishing, non-greasy plant oil that hydrates and helps calm the skin, with a good safety profile for most skin types.

Irritation

low

Source

natural

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Thickener

Candelilla Wax

EUPHORBIA CERIFERA CERA

4.0

A vegan-friendly plant wax that helps thicken and stabilize products while providing a smooth, protective feel on skin.

Irritation

low

Source

natural

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Emollient

Candelilla Wax Esters

Candelilla Wax Esters

4.3

A vegan, plant-derived wax that helps thicken and stabilize formulas while leaving a smooth, non-greasy feel on skin.

Irritation

low

Source

natural

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Emollient

Candelilla Wax Extract

EUPHORBIA CERIFERA CERA EXTRACT

4.0

A gentle plant wax that helps lock in moisture and gives products a smooth, creamy texture.

Irritation

low

Source

natural

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Emollient

Candlenut Seed Extract

Aleurites Moluccanus Seed Extract

4.0

A gentle, plant-based emollient that helps soften and soothe dry skin without clogging pores.

Irritation

low

Source

natural

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Emollient

Canola Oil

CANOLA OIL

4.0

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

Irritation

low

Source

natural

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Emollient

Canola Oil Glyceride

CANOLA OIL GLYCERIDE

4.0

A mild, non-greasy emollient that helps soften and smooth skin with a low risk of irritation or clogged pores.

Irritation

low

Source

natural

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