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

PEG-2 Laurate SE

PEG-2 Laurate SE

3.5

PEG-2 Laurate SE helps mix oil and water in creams and cleansers, but may be slightly irritating or pore-clogging for sensitive or acne-prone skin.

Irritation

moderate

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-2 Oleate

PEG-2 Oleate

3.5

PEG-2 Oleate is a mild synthetic emulsifier that helps blend oil and water in cleansers and creams, but it may be less common in modern formulations due to concerns about ethoxylation byproducts.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-2 Oleate SE

PEG-2 Oleate SE

3.5

A reliable emulsifier for oil-and-water blends, but may be too rich for acne-prone skin.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-2 Olive Glycerides

PEG-2 OLIVE GLYCERIDES

4.0

A gentle, olive-derived emulsifier that helps blend oil and water in skincare formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-2 Ricinoleate

PEG-2 Ricinoleate

3.8

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

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-2 Sorbitan Trioleate

PEG-2 Sorbitan Trioleate

3.8

A gentle synthetic emulsifier that helps mix water and oil in creams and lotions, generally well-tolerated by most skin types.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-2 Stearate

PEG-2 Stearate

3.8

PEG-2 Stearate is a reliable emulsifier that keeps creams and lotions stable, but it may be moderately comedogenic for acne-prone skin.

Irritation

low

Source

synthetic

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Emulsifier

PEG-2 Stearate SE

PEG-2 Stearate SE

3.8

A reliable emulsifier that helps create stable, creamy textures, but may be slightly pore-clogging for some skin types.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-2 Sunflower Glycerides

PEG-2 Sunflower Glycerides

4.0

A gentle, sunflower-derived emulsifier that helps blend oil and water in skincare products while adding a light, non-greasy feel.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-20 Almond Glycerides

PEG-20 Almond Glycerides

4.0

A mild, almond-derived emulsifier that helps create stable, creamy formulas without heavy greasiness.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-20 Castor Oil

PEG-20 Castor Oil

3.8

PEG-20 Castor Oil helps mix oil and water in cleansers and shampoos, but may be irritating for sensitive or acne-prone skin.

Irritation

moderate

Source

semi-synthetic

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Emulsifier

PEG-20 Corn Glycerides

PEG-20 Corn Glycerides

4.0

A gentle, plant-derived emulsifier that helps blend oil and water in skincare formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-20 Dilaurate

PEG-20 Dilaurate

3.5

PEG-20 Dilaurate is a safe, widely used emulsifier that helps mix water and oil in skincare products, but its PEG component raises minor purity concerns for sensitive skin.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Dioleate

PEG-20 Dioleate

3.8

A reliable synthetic emulsifier that helps mix water and oil, but may be too heavy for very oily or acne-prone skin in high concentrations.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Distearate

PEG-20 Distearate

3.8

PEG-20 Distearate is a reliable emulsifier that keeps your lotions and creams from separating, but it's synthetic and may not appeal to those seeking natural ingredients.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Evening Primrose Glycerides

PEG-20 Evening Primrose Glycerides

4.0

A gentle, semi-synthetic emulsifier that helps blend oil and water in creams and lotions while providing light skin conditioning.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-20 Glyceryl Laurate

PEG-20 Glyceryl Laurate

4.0

A gentle emulsifier that helps create stable, creamy formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-20 Glyceryl Oleate

PEG-20 Glyceryl Oleate

4.0

A gentle emulsifier that helps cleansers remove dirt and oil without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-20 Glyceryl Ricinoleate

PEG-20 Glyceryl Ricinoleate

3.5

A gentle emulsifier that helps mix oil and water in cleansers and creams, but may be drying for very sensitive skin in high concentrations.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-20 Glyceryl Stearate

PEG-20 Glyceryl Stearate

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Glyceryl Triisostearate

PEG-20 Glyceryl Triisostearate

4.0

A reliable synthetic emulsifier that helps create smooth, stable lotions and creams without common irritation concerns.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Glyceryl Trioleate

PEG-20 Glyceryl Trioleate

3.8

A reliable synthetic emulsifier that helps create stable, creamy formulas, but may raise concerns for those avoiding PEG compounds.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Hexadecenylsuccinate

PEG-20 Hexadecenylsuccinate

3.5

A safe, effective emulsifier that helps oil and water mix, but it's synthetic and may not appeal to those seeking natural ingredients.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Hydrogenated Castor Oil

PEG-20 Hydrogenated Castor Oil

4.0

A gentle, plant-based emulsifier that helps mix oil and water in your skincare, but may feel slightly heavy on very oily skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-20 Hydrogenated Palm Glycerides

PEG-20 Hydrogenated Palm Glycerides

4.0

A gentle, palm-derived emulsifier that helps mix water and oil, but its environmental footprint and processing raise concerns for some users.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-20 Isostearate

PEG-20 Isostearate

3.8

A reliable synthetic emulsifier that stabilizes formulas but may not suit those avoiding PEGs.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Lanolate

PEG-20 Lanolate

3.8

A gentle, water-friendly lanolin derivative that helps blend oil and water in formulas, but may not suit those with wool allergies.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emollient

PEG-20 Lanolin

PEG-20 Lanolin

3.5

PEG-20 Lanolin is a water-friendly version of lanolin that softens skin and helps blend oils and water, but it may clog pores for some and raises concerns about processing impurities.

Irritation

low

Source

semi-synthetic

beautyskincareemollientemulsifier
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Emulsifier

PEG-20 Laurate

PEG-20 Laurate

3.5

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Mannitan Laurate

PEG-20 Mannitan Laurate

4.0

A gentle, PEG-based emulsifier that helps mix oil and water in your products without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Methyl Glucose Sesquilaurate

PEG-20 Methyl Glucose Sesquilaurate

4.0

A gentle, glucose-derived emulsifier that helps create stable, non-greasy creams and cleansers with low irritation potential.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Myristate

PEG-20 Myristate

3.8

A reliable synthetic emulsifier that helps products feel smooth and stable, but may not suit those avoiding PEGs.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Oleate

PEG-20 Oleate

3.5

A safe, effective emulsifier that helps mix oil and water in creams and cleansers, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Palmitate

PEG-20 Palmitate

3.5

A gentle synthetic emulsifier that helps keep your lotions and creams smooth and stable, but may not suit those avoiding PEGs.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emollient

PEG-20 Phytosterol

PEG-20 PHYTOSTEROL

4.0

A gentle, plant-based emollient that improves skin hydration and helps blend water and oil in formulas.

Irritation

low

Source

semi-synthetic

beautyskincareemollientemulsifier
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Emulsifier

PEG-20 Sorbitan Cocoate

PEG-20 Sorbitan Cocoate

4.0

A gentle, PEG-based emulsifier derived from coconut oil that helps blend oil and water in cleansers and creams without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansingemulsifier
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Emulsifier

PEG-20 Sorbitan Isostearate

PEG-20 Sorbitan Isostearate

3.8

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Sorbitan Oleate

PEG-20 Sorbitan Oleate

4.0

A gentle, widely used emulsifier that helps mix water and oil in skincare products without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Sorbitan Triisostearate

PEG-20 SORBITAN TRIISOSTEARATE

3.8

A reliable synthetic emulsifier that keeps oil and water mixed in creams and lotions, generally well-tolerated but not biodegradable.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Soy Sterol

PEG-20 SOY STEROL

4.0

A mild, plant-derived emulsifier that helps create stable, non-greasy lotions and creams while offering light skin conditioning.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Stearate

PEG-20 Stearate

3.8

A reliable emulsifier that helps create smooth, stable creams and lotions, but may be too heavy for very oily or acne-prone skin.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Tallowate

PEG-20 Tallowate

3.5

PEG-20 Tallowate is a functional emulsifier that helps products feel creamy, but its animal-derived origin and potential for trace impurities may not suit all preferences.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20 Tsubakiate Glycerides

PEG-20 TSUBAKIATE GLYCERIDES

4.0

A mild, plant-based emulsifier that helps blend oil and water in formulas while providing light skin conditioning.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-20-PPG-10 Glyceryl Stearate

PEG-20-PPG-10 Glyceryl Stearate

4.0

A reliable synthetic emulsifier that keeps water and oil mixed in your creams and lotions, generally well-tolerated by most skin types.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-200 Glyceryl Stearate

PEG-200 Glyceryl Stearate

3.8

A reliable emulsifier that helps blend oil and water in creams and lotions, but its PEG component raises mild purity concerns for some users.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-200 Hydrogenated Glyceryl Palmate

PEG-200 Hydrogenated Glyceryl Palmate

3.8

A workhorse emulsifier that helps your cleanser and lotion stay smooth and stable, but it's synthetic and may not suit those avoiding PEGs.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-23 Glyceryl Distearate

PEG-23 Glyceryl Distearate

3.8

A reliable synthetic emulsifier that helps create stable, creamy formulas, but may not suit those avoiding PEG compounds.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-23 Glyceryl Laurate

PEG-23 Glyceryl Laurate

3.8

A gentle synthetic emulsifier that helps mix water and oil in cleansers and creams, but may not suit those avoiding PEGs.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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