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

Propyl Valerate

Propyl Valerate

4.0

A lightweight, non-greasy emollient that softens skin and improves product texture with low irritation potential.

Irritation

low

Source

synthetic

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Emollient

Propylene Glycol Caprylate

Propylene Glycol Caprylate

4.0

A gentle, lightweight emollient that helps soften skin and improve product texture without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Propylene Glycol Dicaprylate

Propylene Glycol Dicaprylate

4.0

A lightweight, synthetic emollient that helps products spread smoothly without clogging pores or feeling heavy.

Irritation

low

Source

synthetic

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Emollient

Propylene Glycol Dicocoate

PROPYLENE GLYCOL DICOCOATE

4.0

A gentle, coconut-derived emollient that helps soften skin without clogging pores, making it a good choice for sensitive and acne-prone skin types.

Irritation

low

Source

synthetic

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Emollient

Propylene Glycol Diethylhexanoate

Propylene Glycol Diethylhexanoate

4.0

A lightweight synthetic emollient that spreads easily and leaves a silky finish, generally well-tolerated by most skin types.

Irritation

low

Source

synthetic

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Emollient

Propylene Glycol Dilaurate

Propylene Glycol Dilaurate

3.5

A synthetic emollient that softens skin and improves product feel, but may be moderately pore-clogging for some.

Irritation

low

Source

synthetic

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Emollient

Propylene Glycol Dipelargonate

Propylene Glycol Dipelargonate

4.0

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

Irritation

low

Source

synthetic

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Emollient

Propylene Glycol Distearate

Propylene Glycol Distearate

4.0

A gentle synthetic emollient that helps create a smooth, creamy texture in skincare products without clogging pores.

Irritation

low

Source

synthetic

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Emollient

Propylene Glycol Hydroxystearate

Propylene Glycol Hydroxystearate

4.0

A gentle emollient and emulsifier 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

Propylene Glycol Isostearate

Propylene Glycol Isostearate

3.8

A gentle emollient and emulsifier that helps products feel smooth and spread easily, with a low risk of irritation.

Irritation

low

Source

semi-synthetic

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Emollient

Propylene Glycol Laurate

Propylene Glycol Laurate

4.0

A gentle, synthetic emollient that helps soften skin and stabilize formulas without common irritation.

Irritation

low

Source

synthetic

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Emollient

Propylene Glycol Linoleate

Propylene Glycol Linoleate

3.8

A gentle emollient that helps soften skin and improve product texture, but offers no unique benefits over more common alternatives.

Irritation

low

Source

semi-synthetic

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Emollient

Propylene Glycol Linolenate

PROPYLENE GLYCOL LINOLENATE

3.8

A gentle emollient that helps soften and smooth skin by replenishing essential fatty acids, with a low risk of irritation.

Irritation

low

Source

semi-synthetic

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Emollient

Propylene Glycol Oleate

Propylene Glycol Oleate

3.8

A mild emollient and emulsifier that helps soften skin and blend ingredients, but may be slightly pore-clogging for acne-prone skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Propylene Glycol Oleate SE

Propylene Glycol Oleate SE

3.5

A reliable emulsifier that helps blend oil and water in creams, but it's not a star active ingredient for skin benefits.

Irritation

low

Source

semi-synthetic

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Emollient

Propylene Glycol Ricinoleate

Propylene Glycol Ricinoleate

3.8

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

Propylene Glycol Soyate

PROPYLENE GLYCOL SOYATE

3.8

A gentle, plant-based emollient that helps soften and smooth skin without heavy greasiness.

Irritation

low

Source

semi-synthetic

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Emollient

Propylheptyl Caprylate

Propylheptyl Caprylate

4.0

A silky, lightweight emollient that helps products spread smoothly without feeling heavy or greasy.

Irritation

low

Source

synthetic

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Emollient

Prunus Insititia Seed Oil

PRUNUS INSITITIA SEED OIL

4.2

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

Irritation

low

Source

natural

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Emollient

Prunus Pedunculata Seed Oil

Prunus Pedunculata Seed Oil

4.0

A gentle, plant-based oil that hydrates and softens skin without clogging pores, though research on its specific benefits is still limited.

Irritation

low

Source

natural

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Emollient

Pueraria Flower Oil

Pueraria Thunbergiana Flower Oil

3.5

A gentle floral oil with antioxidant potential, but research on its specific skin benefits is still emerging.

Irritation

low

Source

natural

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Emollient

Pumpkin Seed Oil PEG-8 Esters

PUMPKIN SEED OIL PEG-8 ESTERS

4.0

A gentle, semi-synthetic emollient that combines the nourishing fatty acids of pumpkin seed oil with better spreadability and water compatibility.

Irritation

low

Source

semi-synthetic

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Emollient

Purple Shamrock Oil

Oxalis Triangularis Oil

3.5

A gentle, antioxidant-rich plant oil that may help soothe and moisturize skin, but research is very limited.

Irritation

low

Source

natural

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Emollient

Pycnanthus Angolensis Nut Oil

PYCNANTHUS ANGOLENSIS NUT OIL

4.0

A gentle, plant-based oil that hydrates and softens skin without clogging pores, though research on its unique benefits is still limited.

Irritation

low

Source

natural

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Emollient

Quince Peel/Fruit Wax

Pyrus Cydonia Peel/Fruit Wax

4.0

A gentle, plant-derived wax that helps lock in moisture and create a smooth, protective layer on skin.

Irritation

low

Source

natural

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Emollient

Quince Seed Oil

Pyrus Cydonia Seed Oil

4.0

Quince seed oil is a gentle, nutrient-rich emollient that hydrates and softens skin without clogging pores.

Irritation

low

Source

natural

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Emollient

Quinoa Seed Oil

Chenopodium Quinoa Seed Oil

4.0

Quinoa seed oil is a gentle, nutrient-dense emollient that helps soften and protect the skin without clogging pores.

Irritation

low

Source

natural

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Emollient

Quinoa Seed Oil Ethyl Esters

Chenopodium Quinoa Seed Oil Ethyl Esters

4.0

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

Irritation

low

Source

semi-synthetic

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Emollient

Radish Seed Oil

RAPHANUS SATIVUS SEED OIL

4.0

A lightweight, non-comedogenic oil that hydrates and softens skin without feeling heavy, suitable for most skin types.

Irritation

low

Source

natural

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Emollient

Raffinose Myristate

RAFFINOSE MYRISTATE

4.0

Raffinose Myristate is a mild, sugar-based emollient that hydrates and conditions skin without clogging pores, making it a good option for sensitive or acne-prone skin.

Irritation

low

Source

semi-synthetic

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Humectant

Raffinose Oleate

RAFFINOSE OLEATE

4.0

Raffinose Oleate is a gentle, sugar-based ingredient that hydrates and soothes the skin, making it a promising option for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

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Skin conditioner

Rapeseed Ferment Extract

CANDIDA BOMBICOLA/GLUCOSE/METHYL RAPESEEDATE FERMENT

4.0

A gentle, biotech-derived emollient that helps soften and condition skin without clogging pores.

Irritation

low

Source

biotech

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Emollient

Rapeseed Oil

Brassica Campestris (Rapeseed) Seed Oil

4.0

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

Irritation

low

Source

natural

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Emollient

Rapeseed Oil PEG-3 Esters

RAPESEED OIL PEG-3 ESTERS

4.0

A gentle, plant-derived emollient and emulsifier that helps moisturize and stabilize formulas without heavy greasiness.

Irritation

low

Source

semi-synthetic

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Emollient

Rapeseed Oil Unsaponifiables

BRASSICA CAMPESTRIS OIL UNSAPONIFIABLES

4.0

A gentle, lipid-rich emollient that helps restore the skin barrier and reduce moisture loss without clogging pores.

Irritation

low

Source

natural

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Skin Conditioning Agent

Rapeseed Sterols

Brassica Campestris Sterols

4.3

A gentle, plant-based ingredient that mimics the skin's natural lipids to strengthen the moisture barrier and soothe dryness.

Irritation

low

Source

natural

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Emollient

Raspberry Seed Oil PEG-8 Esters

RASPBERRY SEED OIL PEG-8 ESTERS

4.0

A gentle, semi-synthetic emollient that combines the nourishing fatty acids of raspberry seed oil with improved texture and water compatibility.

Irritation

low

Source

semi-synthetic

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Emollient

Red Raspberry Leaf Wax

RUBUS IDAEUS LEAF WAX

4.0

A gentle, plant-derived wax that adds richness and a smooth feel to balms and sticks without clogging pores.

Irritation

low

Source

natural

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Emollient

Red Raspberry Seed Oil

RUBUS IDAEUS SEED OIL

4.3

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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Emollient

Rhus Succedanea Fruit Wax

RHUS SUCCEDANEA FRUIT WAX

4.0

A natural fruit wax that provides a smooth, glossy feel and helps thicken products, but may be moderately comedogenic for acne-prone skin.

Irritation

low

Source

natural

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Emollient

Rice Bran Oil Esters

Rice Bran Oil/Hydrogenated Rice Bran Oil Esters

4.0

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

Irritation

low

Source

natural

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Emollient

Rice Bran Oil Extract

ORYZA SATIVA (RICE) BRAN OIL EXTRACT

4.2

A gentle, antioxidant-rich oil that hydrates and soothes skin without clogging pores.

Irritation

low

Source

natural

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Emollient

Rice Bran Sterol

Oryza Sativa (Rice) Bran Sterol

4.3

A gentle, plant-based emollient that mimics skin's natural lipids to support a healthy moisture barrier.

Irritation

low

Source

natural

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