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 1,342
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

Emulsifier

Polyglyceryl-6 Sesquicaprylate

POLYGLYCERYL-6 SESQUICAPRYLATE

4.5

A mild, non-irritating emulsifier that helps create stable, lightweight formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polyglyceryl-6 Shea Butterate

POLYGLYCERYL-6 SCLEROCARYA BIRREA SEEDATE

4.5

A mild, eco-friendly emulsifier that helps blend water and oil in creams and lotions while leaving skin feeling soft.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polyglyceryl-6 Stearate

Polyglyceryl-6 Stearate

4.5

A mild, plant-derived emulsifier that creates stable, lightweight textures without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polyglyceryl-6 Tetraoleate

Polyglyceryl-6 Tetraoleate

4.5

A mild, plant-derived emulsifier that helps create stable, non-greasy formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polyglyceryl-6 Trilaurate

Polyglyceryl-6 Trilaurate

4.5

A mild, effective emulsifier that creates stable, elegant textures without common irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polyglyceryl-6 Tristearate

Polyglyceryl-6 Tristearate

4.5

A mild, plant-derived emulsifier that helps create stable, creamy textures without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polyglyceryl-6 Undecylenate

Polyglyceryl-6 Undecylenate

4.5

A mild, non-stripping emulsifier that helps create stable, rinse-off and leave-on products without drying the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polyglyceryl-6 Ximenia Seedate

Polyglyceryl-6 Ximenia Americana Seedate

4.3

A mild, eco-friendly emulsifier that stabilizes formulas while leaving skin feeling soft—great for sensitive and natural-leaning routines.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polyglyceryl-8 Ester Blend

POLYGLYCERYL-8 DECAERUCATE/DECAISOSTEARATE/DECARICINOLEATE

4.0

A gentle, plant-derived emulsifier that helps create smooth, stable creams and lotions with a silky feel.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-8 Oleate

Polyglyceryl-8 Oleate

4.3

A mild, plant-derived emulsifier that stabilizes formulas without stripping the skin or causing irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polyglyceryl-8 Stearate

Polyglyceryl-8 Stearate

4.5

A mild, plant-derived emulsifier that creates stable, creamy textures without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Dispersant

Polyhydroxystearic Acid

Polyhydroxystearic Acid

4.2

A gentle synthetic polymer that helps sunscreen minerals and pigments spread evenly and stay stable, with very low irritation potential.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Polylactate/Ricinoleate

Polylactate/Ricinoleate

4.0

A gentle, plant-derived emulsifier that helps blend oil and water in formulas while also softening the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate

Polysorbate 20, Polysorbate 60, Polysorbate 80

4.0

Polysorbates are widely used, gentle emulsifiers that keep your skincare products stable and easy to rinse off.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 20

Polysorbate 20

4.2

Polysorbate 20 is a widely used, gentle emulsifier that helps mix water and oil, making it a staple in many cleansers and lotions.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 20 Dicinnamate

Polysorbate 20 Dicinnamate

3.8

A hybrid ingredient that helps blend water and oil while offering mild UV protection, but research is still limited.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 40

Polysorbate 40

4.0

Polysorbate 40 is a gentle emulsifier that keeps oil and water mixed in your products, but it may be too rich for very oily or acne-prone skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 60

Polysorbate 60

4.0

Polysorbate 60 is a gentle, widely used emulsifier that keeps oil and water mixed in creams and lotions without causing irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 61

Polysorbate 61

4.0

Polysorbate 61 is a gentle emulsifier that keeps oil and water mixed in creams and lotions, with a low risk of irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 65

Polysorbate 65

4.0

Polysorbate 65 is a gentle emulsifier that keeps oil and water mixed in creams and lotions, with a very low risk of irritation or clogged pores.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 80

Polysorbate 80

4.0

Polysorbate 80 is a widely used, gentle emulsifier that helps mix oil and water in skincare, but it can be slightly drying for very sensitive skin at high concentrations.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 80 Acetate

POLYSORBATE 80 ACETATE

4.0

A gentle emulsifier that helps mix water and oil in skincare, with a low risk of irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 80 Dicinnamate

Polysorbate 80 Dicinnamate

3.5

A gentle emulsifier with antioxidant potential, but research on its skin benefits is still limited.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 81

Polysorbate 81

4.0

Polysorbate 81 is a gentle emulsifier that helps mix oil and water in products, with a low risk of irritation or clogged pores.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 85

Polysorbate 85

4.0

Polysorbate 85 is a gentle emulsifier that helps mix oil and water in formulas, with a low risk of irritation or clogged pores.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PPG-1 Beheneth-15

PPG-1 BEHENETH-15

4.0

A gentle synthetic emulsifier that helps mix water and oil in your products, with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PPG-1-CETETH-1

PPG-1-CETETH-1

3.5

A gentle synthetic emulsifier that helps mix water and oil, but offers no direct skin benefit beyond formulation.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PPG-1-Ceteth-10

PPG-1-CETETH-10

3.8

A reliable synthetic emulsifier that helps create stable, creamy textures in skincare products.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PPG-1-Ceteth-5

PPG-1-CETETH-5

3.8

A gentle synthetic emulsifier that helps oil and water mix, making creams and lotions stable and smooth.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PPG-1-Deceth-5

PPG-1-DECETH-5

3.5

PPG-1-Deceth-5 is a gentle synthetic emulsifier that helps mix water and oil in products, but it offers no direct skin benefit beyond formula stability.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PPG-10 Ceteareth-20

PPG-10 Ceteareth-20

3.5

A reliable synthetic emulsifier that helps create stable, creamy textures but offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PPG-12 Laneth-50

PPG-12-LANETH-50

3.5

A reliable synthetic emulsifier that helps mix oil and water, but offers no direct skin benefit beyond texture.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emollient

PPG-12-PEG-50 Lanolin

PPG-12-PEG-50 Lanolin

3.8

A versatile, low-irritation lanolin derivative that helps blend oil and water while softening skin.

Irritation

low

Source

semi-synthetic

beautyskincareemollientemulsifier
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Emulsifier

PPG-13 Decyltetradeceth-24

PPG-13 DECYLTETRADECETH-24

3.8

A reliable synthetic emulsifier that helps create smooth, stable lotions and creams with a pleasant feel.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PPG-15 Buteth-20

PPG-15 BUTETH-20

3.8

A reliable synthetic emulsifier that helps mix water and oil, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PPG-2 Ceteth-5

PPG-2-CETETH-5

3.5

A reliable synthetic emulsifier that helps keep your skincare products stable and well-mixed, but it offers no direct skin benefits.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PPG-2 Isoceteth-20 Acetate

PPG-2 ISOCETETH-20 ACETATE

4.0

A gentle synthetic emulsifier that helps water and oil mix, making your cleansers and creams smooth and stable.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Surfactant

PPG-2 Laureth-12

PPG-2-Laureth-12

3.5

PPG-2 Laureth-12 is a synthetic emulsifier that helps cleansers foam and rinse clean, but it can be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleansingemulsifier
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Emulsifier

PPG-2-Ceteth-1

PPG-2-CETETH-1

3.8

A gentle synthetic emulsifier that helps mix oil and water in creams and lotions, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emollient

PPG-20-PEG-20 Hydrogenated Lanolin

PPG-20-PEG-20 Hydrogenated Lanolin

3.8

A versatile, semi-synthetic emollient that softens skin and helps blend oil and water, but may clog pores for some.

Irritation

low

Source

semi-synthetic

beautyskincareemollientemulsifier
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Emulsifier

PPG-23 Steareth-34

PPG-23 Steareth-34

3.5

A reliable synthetic emulsifier that stabilizes formulas but offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PPG-24-Buteth-27

PPG-24-BUTETH-27

3.5

A reliable synthetic emulsifier that helps keep your lotions and creams smooth and stable, but it's not a star active ingredient.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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