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

Octyldodecyl Meadowfoamate

OCTYLDODECYL MEADOWFOAMATE

4.5

A silky, non-greasy emollient that softens skin without clogging pores, ideal for sensitive and oily skin types.

Irritation

low

Source

semi-synthetic

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Emollient

Octyldodecyl Myristate

Octyldodecyl Myristate

4.0

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

Octyldodecyl Neodecanoate

Octyldodecyl Neodecanoate

4.0

A lightweight, synthetic emollient that softens skin without clogging pores, commonly used to improve product texture and spreadability.

Irritation

low

Source

synthetic

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Emollient

Octyldodecyl Neopentanoate

Octyldodecyl Neopentanoate

4.0

A lightweight synthetic emollient that spreads easily and leaves a silky finish, ideal for non-greasy formulations.

Irritation

low

Source

synthetic

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Emollient

Octyldodecyl Oleate

Octyldodecyl Oleate

4.0

A silky, non-greasy emollient that softens skin and helps other ingredients spread evenly, with a low risk of clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Octyldodecyl Olivate

OCTYLDODECYL OLIVATE

4.3

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

Irritation

low

Source

semi-synthetic

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Emollient

Octyldodecyl PCA

Octyldodecyl PCA

4.0

A gentle, non-greasy emollient that helps soften skin and improve the texture of moisturizing products.

Irritation

low

Source

semi-synthetic

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Emollient

Octyldodecyl Ricinoleate

OCTYLDODECYL RICINOLEATE

4.0

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

Irritation

low

Source

semi-synthetic

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Emollient

Octyldodecyl Safflowerate

OCTYLDODECYL SAFFLOWERATE

4.3

A lightweight, plant-based emollient that softens skin without clogging pores, ideal for oily and combination skin types.

Irritation

low

Source

semi-synthetic

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Emollient

Octyldodecyl Stearate

Octyldodecyl Stearate

4.0

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

Irritation

low

Source

synthetic

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Emollient

Octyldodecyl Stearoyl Stearate

Octyldodecyl Stearoyl Stearate

4.0

A reliable, lightweight emollient that softens skin without clogging pores, commonly used to improve product texture.

Irritation

low

Source

synthetic

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Emollient

Odontella Aurita Oil

Odontella Aurita Oil

4.0

A gentle, marine-derived oil that hydrates and protects skin with omega fatty acids and antioxidants, suitable for most skin types.

Irritation

low

Source

natural

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Emollient

Oenocarpus Bataua Acid

Oenocarpus Bataua Acid

4.0

A gentle, plant-derived fatty acid that helps soften and condition skin without clogging pores.

Irritation

low

Source

natural

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Emollient

Olax Dissitiflora Root Oil

Olax Dissitiflora Root Oil

3.5

A gentle, plant-based oil with limited research but promising traditional use for soothing and moisturizing the skin.

Irritation

low

Source

natural

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Skin Conditioning Agent

Oleamide

Oleamide

3.8

Oleamide helps soften and condition skin and hair, but it's not a standout ingredient and is rarely the star of a formula.

Irritation

low

Source

semi-synthetic

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Emollient

Oleic Acid

Oleic Acid

3.8

Oleic acid is a natural fatty acid that softens skin and helps other ingredients absorb, but it can be moderately clogging for acne-prone skin.

Irritation

low

Source

natural

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Emollient

Oleostearine

Oleostearine

3.5

Oleostearine is a natural emollient that softens skin and thickens formulas, but it may clog pores for acne-prone individuals.

Irritation

low

Source

natural

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Emollient

Oleoyl Cocoa Seed Extract

Oleoyl Cocoa Seed Extract

4.0

A gentle, fatty-acid-enriched cocoa extract that moisturizes and provides antioxidant protection, suitable for most skin types.

Irritation

low

Source

semi-synthetic

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Skin conditioning agent

Oleoyl Oleamide Serinol

Oleoyl Oleamide Serinol

4.2

A gentle, science-backed ingredient that mimics natural skin lipids to support a healthy moisture barrier.

Irritation

low

Source

synthetic

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Emollient

Oleth-2 Benzoate

OLETH-2 BENZOATE

3.8

A gentle synthetic emollient that helps products glide on smoothly without heavy greasiness.

Irritation

low

Source

synthetic

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Emollient

Oleyl Acetate

OLEYL ACETATE

3.8

Oleyl Acetate is a lightweight emollient that softens skin but may clog pores for acne-prone individuals.

Irritation

low

Source

synthetic

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Emollient

Oleyl Alcohol

Oleyl Alcohol

4.0

A gentle fatty alcohol that softens skin and thickens formulas, but may clog pores for some.

Irritation

low

Source

natural

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Emollient

Oleyl Arachidate

Oleyl Arachidate

4.0

A gentle wax ester that softens skin and improves product feel without common irritation.

Irritation

low

Source

semi-synthetic

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Emollient

Oleyl Erucate

Oleyl Erucate

3.8

Oleyl Erucate is a gentle emollient that helps soften and smooth skin, but it's not a standout active ingredient.

Irritation

low

Source

synthetic

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Emollient

Oleyl Glyceryl Ether

Oleyl Glyceryl Ether

4.0

A gentle emollient that helps soften skin and stabilize formulas without clogging pores or causing irritation.

Irritation

low

Source

semi-synthetic

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Emollient

Oleyl Lactate

Oleyl Lactate

4.0

Oleyl lactate is a gentle, non-greasy emollient that helps soften skin and improve texture without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Oleyl Lanolate

Oleyl Lanolate

3.8

Oleyl Lanolate is a gentle emollient that helps soften skin, but may clog pores in acne-prone individuals.

Irritation

low

Source

semi-synthetic

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Emollient

Oleyl Linoleate

Oleyl Linoleate

4.0

A gentle emollient that helps soften skin and support barrier function, with a low risk of irritation or clogged pores.

Irritation

low

Source

semi-synthetic

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Emollient

Oleyl Myristate

Oleyl Myristate

4.0

Oleyl Myristate is a reliable emollient that softens skin and improves product feel, but it may clog pores for acne-prone individuals.

Irritation

low

Source

semi-synthetic

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Emollient

Oleyl Oleate

Oleyl Oleate

3.8

Oleyl Oleate is a lightweight emollient that softens skin and helps other ingredients absorb, but it may clog pores for acne-prone individuals.

Irritation

low

Source

semi-synthetic

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Emollient

Oleyl Palmitamide

Oleyl Palmitamide

3.5

Oleyl Palmitamide is a gentle emollient that helps soften and condition the skin, but research on its specific benefits is still limited.

Irritation

low

Source

synthetic

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Emollient

Oleyl Stearate

Oleyl Stearate

3.8

Oleyl Stearate is a gentle emollient that helps soften skin and improve product texture, with a low risk of irritation or clogged pores.

Irritation

low

Source

semi-synthetic

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Emollient

Olive Fruit Unsaponifiables

Olea Europaea Fruit Unsaponifiables

4.3

A gentle, plant-derived emollient that helps calm and reinforce the skin barrier without clogging pores.

Irritation

low

Source

natural

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Emollient

Olive Husk Oil

Olea Europaea Husk Oil

4.0

Olive Husk Oil is a gentle, antioxidant-rich emollient that hydrates skin without feeling heavy, but it may clog pores for some people.

Irritation

low

Source

natural

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Emollient

Olive Oil Decyl Esters

OLIVE OIL DECYL ESTERS

4.3

A lightweight, non-greasy emollient derived from olive oil that helps moisturize and soften skin without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Olive Oil Ethyl Ester

Olea Europaea Fruit Oil Ethyl Ester

4.3

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

Irritation

low

Source

semi-synthetic

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Emollient

Olive Oil Ethylhexyl Esters

Olive Oil Ethylhexyl Esters

4.3

A lightweight, non-greasy emollient derived from olive oil that softens skin and improves product texture without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Olive Oil Propylene Glycol Esters

OLIVE OIL PROPYLENE GLYCOL ESTERS

4.0

A gentle, olive-derived emollient that helps soften skin and stabilize water-and-oil mixtures without heavy greasiness.

Irritation

low

Source

semi-synthetic

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Emollient

Olive Oil Unsaponifiables

Olea Europaea Oil Unsaponifiables

4.3

A nourishing, non-greasy fraction of olive oil that helps restore the skin barrier and soothe dryness without clogging pores.

Irritation

low

Source

natural

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Emollient

Olus Oil

Olus Oil

4.0

Olus Oil is a gentle, plant-derived emollient that softens and smooths skin without heavy greasiness.

Irritation

low

Source

natural

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Skin Conditioning

Ophiopogon Extract Stearate

Ophiopogon Japonicus Extract Stearate

3.8

A gentle, semi-synthetic emollient derived from a traditional Asian herb, offering mild skin conditioning with limited but promising research.

Irritation

low

Source

semi-synthetic

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Emollient

Orange Roughy Oil

Hoplostethus Atlanticus Oil

3.5

Orange Roughy Oil is a moisturizing fish oil that can soften skin, but its sustainability and comedogenic potential are concerns.

Irritation

low

Source

natural

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Emollient

Oriental Poppy Seed Oil

Papaver Orientale Seed Oil

3.8

A gentle, plant-based oil that helps soften and smooth skin, but research on its specific benefits is still limited compared to more common seed oils.

Irritation

low

Source

natural

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Emollient

Ouricury Wax

OURICURY WAX

3.8

Ouricury wax is a natural, plant-based wax that helps thicken and stabilize cosmetic products, offering a smooth, glossy finish similar to carnauba wax.

Irritation

low

Source

natural

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Emollient

Ovum Oil

Ovum Oil

3.8

Ovum oil is a natural emollient rich in fatty acids and lecithin, but its comedogenic potential and limited research mean it's best for dry, non-acne-prone skin.

Irritation

low

Source

natural

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Emollient

Oxalis Hedysaroides Oil

Oxalis Hedysaroides Oil

3.5

A gentle, antioxidant-rich oil from a rare plant, but research is very limited—use with realistic expectations.

Irritation

low

Source

natural

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Emollient

Oxidized Beeswax

Oxidized Beeswax

3.8

A modified beeswax that helps thicken and stabilize formulas, but may be slightly more comedogenic than regular beeswax.

Irritation

low

Source

natural

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Emollient

Oxidized Hazelnut Seed Oil

CORYLUS AVELLANA (HAZELNUT) SEED OIL (OXIDIZED)

3.8

A gentle, naturally derived emollient that helps soften and smooth skin with a low risk of irritation or clogged pores.

Irritation

low

Source

natural

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Emollient

Ozonized Argan Oil

Ozonized Argania Spinosa Kernel Oil

3.8

Ozonized argan oil combines the moisturizing benefits of argan oil with the purifying potential of ozone, but research on its cosmetic benefits is still emerging.

Irritation

low

Source

semi-synthetic

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Emollient

Ozonized Castor Oil

RICINUS COMMUNIS (CASTOR) SEED OIL (AND) OZONE

3.8

A unique oil that combines castor oil's moisturizing power with ozone's potential antimicrobial benefits, but research is still early.

Irritation

low

Source

semi-synthetic

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Emollient

Ozonized Jojoba Oil

SIMMONDSIA CHINENSIS (JOJOBA) SEED OIL (AND) OZONE

3.8

Ozonized jojoba oil combines the moisturizing benefits of jojoba with the antimicrobial potential of ozone, but research on its cosmetic efficacy is still limited.

Irritation

low

Source

semi-synthetic

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Emollient

Ozonized Macadamia Seed Oil

OZONIZED MACADAMIA INTEGRIFOLIA SEED OIL

3.8

Ozonized macadamia seed oil is a gentle, oxygen-enriched emollient that may support skin comfort and barrier function, but its ozone-related benefits are still being explored.

Irritation

low

Source

semi-synthetic

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Emollient

Ozonized Meadowfoam Seed Oil

OZONIZED MEADOWFOAM SEED OIL

3.8

Ozonized meadowfoam seed oil is a unique, oxygen-enriched oil that may help calm skin and support a clearer complexion, though research is still emerging.

Irritation

low

Source

semi-synthetic

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Emollient

Ozonized Sesame Seed Oil

SESAMUM INDICUM (SESAME) SEED OIL (AND) OZONE

3.8

Ozonized sesame seed oil is a unique ingredient that combines the moisturizing benefits of sesame oil with the purifying properties of ozone, making it a promising option for acne-prone or irritated skin.

Irritation

low

Source

semi-synthetic

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Emollient

Ozonized Sunflower Seed Oil

Ozonized Helianthus Annuus (Sunflower) Seed Oil

3.8

Ozonized sunflower seed oil is a semi-synthetic emollient that may help calm skin and support a clearer complexion, but research on its cosmetic benefits is still emerging.

Irritation

low

Source

semi-synthetic

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Emollient

Paeonia Rockii Seed Oil

PAEONIA ROCKII SEED OIL

4.3

A nourishing, non-greasy oil rich in omega fatty acids and antioxidants that helps soften skin and support a healthy moisture barrier.

Irritation

low

Source

natural

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