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 20,769
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-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
Read ingredient review

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
Read ingredient review

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
Read ingredient review

Emulsifier

PEG-200 Castor Oil

PEG-200 Castor Oil

4.0

A gentle, water-soluble emulsifier that helps cleanse without stripping the skin, but may be too heavy for very oily or acne-prone types in high concentrations.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

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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Surfactant

PEG-200 Glyceryl Tallowate

PEG-200 Glyceryl Tallowate

3.8

A gentle cleansing agent derived from tallow that helps remove dirt and oil without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

PEG-200 Hydrogenated Castor Oil

PEG-200 Hydrogenated Castor Oil

3.8

A gentle emulsifier that helps blend oil and water in cleansers and shampoos, but may be too stripping for very dry or sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

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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Viscosity Controlling

PEG-200 Trihydroxystearin

PEG-200 Trihydroxystearin

3.8

A synthetic thickener that gives creams and lotions a rich, velvety texture without clogging pores or irritating skin.

Irritation

low

Source

semi-synthetic

beautyskincareviscosity controlling
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Film Former

PEG-22 Dimethacrylate

PEG-22 Dimethacrylate

3.5

A synthetic film-former that helps products feel smooth and stay put, but offers no active skincare benefit.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Surfactant

PEG-22 Tallow Amine

PEG-22 TALLOW AMINE

3.5

An effective emulsifier and surfactant, but its animal-derived origin and potential for mild irritation make it less popular in modern clean beauty.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Film Former

PEG-22/Dodecyl Glycol Copolymer

PEG-22/DODECYL GLYCOL COPOLYMER

4.0

A safe, synthetic film-former that improves wear time and water resistance without common irritation or clogging concerns.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

PEG-226 Leucine/Glutamate Polymer

METHOXY PEG-226 ETHYLAMINO POLY(LEUCINE/BENZYL GLUTAMATE)

3.5

A synthetic polymer that helps products spread smoothly and feel lightweight, but with limited independent safety data.

Irritation

low

Source

synthetic

beautyskincarefilm former
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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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Film Former

PEG-23 Methacrylate Copolymer

METHOXY PEG-23 METHACRYLATE/GLYCERYL DIISOSTEARATE METHACRYLATE COPOLYMER

3.5

A synthetic film-former that helps makeup and sunscreen last longer, but may feel heavy on some skin types.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Emulsifier

PEG-23 Octyldodecanoate

PEG-23 Octyldodecanoate

3.5

A gentle synthetic emulsifier that helps create stable, creamy textures in skincare, but may not suit those avoiding PEGs.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-23 Oleate

PEG-23 Oleate

3.8

A workhorse emulsifier that helps oil and water mix, but may not be ideal for very sensitive or reactive skin due to potential ethoxylation concerns.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-23 Olivate

PEG-23 Olivate

4.0

A mild, olive-derived cleansing ingredient that helps lift dirt and oil without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Film Former

PEG-23 Polybutanediol Ether Blend

PEG-23 POLY(1,2-BUTANEDIOL)-21 PROPYLENE GLYCOL DIMETHYL ETHER

3.5

A synthetic polymer that helps products spread smoothly and feel lightweight, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Emulsifier

PEG-23 Stearate

PEG-23 Stearate

4.0

A reliable synthetic emulsifier that keeps water and oil mixed in your products, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-24 Hydrogenated Lanolin

PEG-24 Hydrogenated Lanolin

3.8

A gentle, water-soluble lanolin derivative that helps blend oil and water in formulas while softening skin, but may not suit those with wool-wax allergies.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-24 Lanolin

PEG-24 Lanolin

3.8

A gentle, water-soluble lanolin derivative that helps blend oil and water in formulas while adding mild conditioning.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Thickener

PEG-240

PEG-240

3.5

PEG-240 is a safe, synthetic thickener that improves product texture but may be less eco-friendly than natural alternatives.

Irritation

low

Source

synthetic

beautyskincarethickener
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Film Former

PEG-240/HDI Copolymer

PEG-240/HDI Copolymer Bis-Decyltetradeceth-20 Ether

3.8

A synthetic film-former that helps makeup and sunscreen stay put, but may feel heavy or tight on sensitive skin.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Emulsifier

PEG-25 Avocado Oil Glyceryl Esters

PEG-25 Avocado Oil Glyceryl Esters

3.8

A gentle emulsifier that helps blend oil and water in skincare formulas, with mild conditioning benefits from avocado oil.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Surfactant

PEG-25 Castor Oil

PEG-25 Castor Oil

4.0

A gentle, water-soluble emulsifier derived from castor oil that helps blend oil and water in cleansers and shampoos.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Antistatic Agent

PEG-25 Diethylmonium Chloride

PEG-25 Diethylmonium Chloride

3.5

A synthetic conditioning agent that helps reduce static and improve hair feel, but may cause buildup with frequent use.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Emulsifier

PEG-25 Glyceryl Isostearate

PEG-25 Glyceryl Isostearate

3.8

A reliable synthetic emulsifier that helps create stable, creamy textures, but may not suit everyone due to its PEG origin.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-25 Glyceryl Oleate

PEG-25 Glyceryl Oleate

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-25 Glyceryl Stearate

PEG-25 Glyceryl Stearate

3.8

A gentle emulsifier that helps blend oil and water in creams and lotions, with a low risk of irritation or clogged pores.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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