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 20,303
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

Antistatic Agent

PEG-2 Stearmonium Chloride

PEG-2 Stearmonium Chloride

3.8

A synthetic conditioning agent that reduces static and softens hair, but may cause irritation or clog pores in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarehaircare
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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

beautyskincareemulsifier
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Surfactant

PEG-2 Tallow Amine

PEG-2 TALLOW AMINE

3.5

PEG-2 Tallow Amine is an effective emulsifier and conditioning agent, but its animal-derived origin and potential for irritation make it less common in modern skincare.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

PEG-2 Tallowamide DEA

PEG-2 TALLOWAMIDE DEA

3.2

An effective foam booster and thickener, but may cause irritation for sensitive skin and raises ethical concerns due to animal-derived tallow.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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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

beautyskincareemulsifier
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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

beautyskincareemulsifier
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Surfactant

PEG-20 Cocamide

PEG-20 Cocamide

3.5

A common cleansing agent that helps foam and lift dirt, but may be too stripping for dry or sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

PEG-20 Cocamide MEA

PEG-20 Cocamide MEA

3.5

A common foaming agent that helps cleansers lather and remove oil, but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

PEG-20 Cocamine

PEG-20 Cocamine

3.5

PEG-20 Cocamine is a workhorse emulsifier and surfactant, but it may be too harsh for sensitive or acne-prone skin and raises environmental concerns due to its PEG and amine components.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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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

beautyskincareemulsifier
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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 Diricinoleate

PEG-20 Diricinoleate

4.0

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
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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

beautyskincareemulsifier
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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

beautyskincareemulsifier
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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

beautyskincareemulsifier
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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

beautyskincareemulsifier
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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

beautyskincareemulsifier
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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

beautyskincareemulsifier
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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
Read ingredient review

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
Read ingredient review

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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Surfactant

PEG-20 Oleamine

PEG-20 Oleamine

3.5

PEG-20 Oleamine is an effective emulsifier but may cause irritation for sensitive skin, especially at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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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 Tallate

PEG-20 TALLATE

3.5

PEG-20 Tallate is an effective emulsifier but may cause irritation for sensitive skin and raises ethical concerns due to its animal-derived source.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

PEG-20 Tallow Amine

PEG-20 Tallow Amine

3.5

PEG-20 Tallow Amine is an effective emulsifier but may cause irritation for sensitive skin and raises ethical concerns due to its animal-derived origin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

PEG-20 Tallow Ammonium Ethosulfate

PEG-20 Tallow Ammonium Ethosulfate

3.5

A gentle cleansing and conditioning agent derived from animal fat, but may cause irritation for sensitive skin and raises ethical concerns for vegans.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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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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