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-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 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
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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
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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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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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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
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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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Emulsifier

PEG-25 Glyceryl Trioleate

PEG-25 Glyceryl Trioleate

3.5

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-25 Moringa Glycerides

PEG-25 Moringa Glycerides

4.0

A gentle, plant-derived emulsifier that helps blend oil and water in skincare products while providing light skin conditioning.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-25 Soy Sterol

PEG-25 SOY STEROL

4.0

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

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-250 Distearate

PEG-250 Distearate

3.8

A reliable thickener and emulsifier that helps create smooth, stable creams but offers no direct skin benefit.

Irritation

low

Source

synthetic

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Emulsifier

PEG-26 Jojoba Alcohol

PEG-26 JOJOBA ALCOHOL

3.8

A gentle emulsifier derived from jojoba that helps blend oil and water in your products, but it's processed with PEGs, which some prefer to avoid.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-28 Glyceryl Tallowate

PEG-28 Glyceryl Tallowate

3.5

A workhorse emulsifier that helps oil and water mix, but its animal-derived origin and PEG processing raise concerns for some users.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Butylene Glycol Laurate

PEG-3 Butylene Glycol Laurate

3.5

A gentle synthetic emulsifier that helps mix water and oil in your products, but it's not a star ingredient for skin benefits.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Castor Oil

PEG-3 Castor Oil

4.0

A gentle, castor-oil-based emulsifier that helps mix water and oil without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Skin Conditioning Agent

PEG-3 Dehydrocholesteryl Succinate

METHOXY PEG-3 DEHYDROCHOLESTERYL SUCCINATE

3.8

A synthetic cholesterol-like ingredient that helps reinforce the skin barrier and improve texture, but its PEG component may raise concerns for some sensitive users.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Diisostearate

PEG-3 Diisostearate

3.8

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Dioleate

PEG-3 Dioleate

3.5

PEG-3 Dioleate is a reliable emulsifier that helps mix water and oil, but its production may involve potentially concerning impurities if not properly purified.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Dirosinate

PEG-3 Dirosinate

3.5

A synthetic emulsifier that helps mix oil and water, generally considered safe and low-irritation for most skin types.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Distearate

PEG-3 Distearate

3.8

A reliable synthetic emulsifier that stabilizes creams and lotions, but offers no active skin benefits.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Glyceryl Cocoate

PEG-3 Glyceryl Cocoate

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Glyceryl Isostearate

PEG-3 Glyceryl Isostearate

4.0

A gentle emulsifier that helps water and oil mix, making creams and lotions smooth and stable without heavy irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Glyceryl Triisostearate

PEG-3 Glyceryl Triisostearate

4.0

A gentle synthetic emulsifier that helps create stable, creamy textures in skincare without common irritation.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Glyceryl Trioleate

PEG-3 GLYCERYL TRIOLEATE

3.8

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Glyceryl Tristearate

PEG-3 Glyceryl Tristearate

3.8

A reliable synthetic emulsifier that helps create stable, creamy textures in skincare, with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Isostearate

PEG-3 Isostearate

3.8

A reliable synthetic emulsifier that helps blend water and oil in creams and cleansers, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Oleate

PEG-3 Oleate

3.5

PEG-3 Oleate is a synthetic emulsifier that helps mix oil and water, but may cause irritation in sensitive skin at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 PPG-7 Ethylhexyl Ether

PEG-3 PPG-7 Ethylhexyl Ether

3.5

A synthetic helper that keeps oil and water mixed in your products, but it's not a star ingredient on its own.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Sorbitan Oleate

PEG-3 Sorbitan Oleate

3.8

A gentle emulsifier that helps water and oil mix in your skincare products, but it's synthetic and may not suit everyone's preferences.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Sorbitan Stearate

PEG-3 SORBITAN STEARATE

4.0

A gentle emulsifier that helps create stable, creamy textures without common irritation concerns.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Sorbitan Tristearate

PEG-3 SORBITAN TRISTEARATE

3.8

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-3 Trimethylolpropane Tristearate

PEG-3 TRIMETHYLOLPROPANE TRISTEARATE

3.8

A reliable synthetic emulsifier that helps blend oil and water in creams and lotions, generally well-tolerated but not a star active ingredient.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-30 Castor Oil

PEG-30 Castor Oil

3.8

PEG-30 Castor Oil helps mix water and oil in products, but may be irritating for sensitive or acne-prone skin at higher concentrations.

Irritation

moderate

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-30 Glyceryl Diisostearate

PEG-30 GLYCERYL DIISOSTEARATE

3.8

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-30 Glyceryl Isostearate

PEG-30 Glyceryl Isostearate

3.8

A reliable synthetic emulsifier that helps create stable, creamy textures, but may be too heavy for very oily or acne-prone skin.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-30 Glyceryl Laurate

PEG-30 Glyceryl Laurate

3.8

A gentle emulsifier that helps mix oils and water, but may not suit those avoiding PEG compounds.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-30 Glyceryl Oleate

PEG-30 Glyceryl Oleate

3.5

PEG-30 Glyceryl Oleate is a workhorse emulsifier that helps mix oil and water, but it may be slightly irritating for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-30 Glyceryl Stearate

PEG-30 Glyceryl Stearate

4.0

A reliable emulsifier that helps create smooth, stable creams and lotions with a low risk of irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-30 Glyceryl Triisostearate

PEG-30 Glyceryl Triisostearate

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-30 Glyceryl Trioleate

PEG-30 Glyceryl Trioleate

3.8

A reliable emulsifier that helps water and oil mix in creams and lotions, but it is synthetic and may not suit those avoiding PEGs.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-30 Hydrogenated Castor Oil

PEG-30 Hydrogenated Castor Oil

3.8

A reliable emulsifier that helps mix oil and water in cleansers and lotions, but may feel heavy on very oily skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-30 Hydrogenated Lanolin

PEG-30 Hydrogenated Lanolin

3.8

A gentle emulsifier that helps blend oil and water in creams, but may clog pores in acne-prone skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-30 Isostearate

PEG-30 Isostearate

3.5

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emollient

PEG-30 Lanolin

PEG-30 Lanolin

3.5

PEG-30 Lanolin is a water-friendly version of lanolin that softens skin and helps blend oil and water in formulas, but it may clog pores for some people.

Irritation

low

Source

semi-synthetic

beautyskincareemollientemulsifier
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Emulsifier

PEG-30 Phytosterol

PEG-30 Phytosterol

4.0

A gentle, plant-based emulsifier that helps create stable, creamy formulas while offering mild skin conditioning.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-30 Sorbitan Tetraoleate

PEG-30 Sorbitan Tetraoleate

3.5

A reliable synthetic emulsifier that helps oil and water mix in creams and lotions, but it may not suit those seeking fully natural formulas.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-30 Soy Sterol

PEG-30 SOY STEROL

4.0

A reliable, low-irritation emulsifier that helps create stable, creamy formulas while offering mild skin conditioning.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-30 Stearate

PEG-30 Stearate

3.5

A reliable emulsifier that keeps creams stable, but may be too heavy for very oily or acne-prone skin.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-32 Dilaurate

PEG-32 Dilaurate

3.8

A synthetic emulsifier that helps blend oil and water in creams and lotions, generally considered safe and low-irritation for most skin types.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-32 Dioleate

PEG-32 Dioleate

3.5

A synthetic emulsifier that helps blend oil and water, generally safe but may not suit those avoiding PEG compounds.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-32 Distearate

PEG-32 Distearate

3.8

A reliable synthetic emulsifier that helps blend oil and water in creams and lotions, generally considered safe and non-irritating at typical use levels.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-32 Stearate

PEG-32 Stearate

3.8

A reliable emulsifier that keeps creams stable, but may be too heavy for very oily or acne-prone skin.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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