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-5 Glyceryl Oleate

PEG-5 Glyceryl Oleate

3.8

A gentle emulsifier that helps blend oils and water, making cleansers and creams feel smooth without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-5 Glyceryl Sesquioleate

PEG-5 Glyceryl Sesquioleate

3.5

A safe, effective emulsifier that helps your products feel smooth and stable, but it's synthetic and may not suit those avoiding PEGs.

Irritation

low

Source

synthetic

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Emulsifier

PEG-5 Glyceryl Stearate

PEG-5 Glyceryl Stearate

3.8

A gentle emulsifier that helps create stable, creamy textures without heavy irritation or clogging.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-5 Glyceryl Trioleate

PEG-5 Glyceryl Trioleate

3.8

A gentle synthetic emulsifier that helps mix water and oil in your skincare, but may not suit those avoiding PEG compounds.

Irritation

low

Source

synthetic

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Emulsifier

PEG-5 Glyceryl Tristearate

PEG-5 Glyceryl Tristearate

3.8

A reliable synthetic emulsifier that helps creams and lotions feel smooth and stable, but it offers no direct skin benefit.

Irritation

low

Source

synthetic

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Emulsifier

PEG-5 Hydrogenated Castor Oil

PEG-5 Hydrogenated Castor Oil

4.0

A reliable, low-irritation emulsifier that helps mix oil and water in cleansers and creams, but may not suit those avoiding PEG compounds.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-5 Hydrogenated Corn Glycerides

PEG-5 Hydrogenated Corn Glycerides

4.0

A gentle, semi-synthetic emulsifier derived from corn glycerides that helps stabilize creams and lotions without common irritation.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-5 Lanolate

PEG-5 Lanolate

3.5

PEG-5 Lanolate is a gentle, water-friendly emollient that helps soften skin and stabilize formulas, but may be moderately clogging for acne-prone skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-5 Lanolinamide

PEG-5 Lanolinamide

3.8

A gentle, lanolin-derived emulsifier that helps blend water and oil, but may be comedogenic for acne-prone skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-5 Phytosterol

PEG-5 Phytosterol

4.3

A mild, plant-based emulsifier that helps blend oil and water while offering skin-soothing and barrier-supporting benefits.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-5 Rapeseed Sterol

PEG-5 RAPESEED STEROL

4.0

A mild, plant-derived emulsifier that helps blend water and oil in creams and lotions while leaving skin feeling smooth.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-5 Sorbitan Isostearate

PEG-5 Sorbitan Isostearate

4.0

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

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-5 Soy Sterol

PEG-5 SOY STEROL

4.3

A mild, plant-based emulsifier that stabilizes formulas and leaves skin feeling soft without clogging pores.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-5 Stearamine

PEG-5 Stearamine

3.5

PEG-5 Stearamine is a synthetic emulsifier that helps blend oil and water, but may cause irritation or clog pores for some skin types.

Irritation

moderate

Source

synthetic

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Emulsifier

PEG-5 Tall Oil Sterol

PEG-5 TALL OIL STEROL

4.0

A mild, 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-5 Trilauryl Citrate

PEG-5 TRILAURYL CITRATE

4.0

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

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-5 Trimyristyl Citrate

PEG-5 Trimyristyl Citrate

4.0

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

Irritation

low

Source

synthetic

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Emulsifier

PEG-5 Tristearyl Citrate

PEG-5 Tristearyl Citrate

4.0

A reliable, low-irritation emulsifier that helps create smooth, stable creams and lotions without clogging pores.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-50 Glyceryl Isostearate

PEG-50 Glyceryl Isostearate

3.8

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

Irritation

low

Source

synthetic

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Emulsifier

PEG-50 Glyceryl Triisostearate

PEG-50 Glyceryl Triisostearate

3.8

A reliable synthetic emulsifier that helps oil and water mix in your creams and cleansers, but it's not a star active ingredient.

Irritation

low

Source

synthetic

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Emulsifier

PEG-50 Glyceryl Trioleate

PEG-50 Glyceryl Trioleate

3.5

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

Irritation

low

Source

synthetic

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Emulsifier

PEG-50 Hydrogenated Castor Oil

PEG-50 HYDROGENATED CASTOR OIL

3.8

A gentle emulsifier that helps mix oil and water, commonly used in cleansers and makeup removers, with a low risk of irritation.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-50 Lanolin

PEG-50 Lanolin

3.5

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

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-50 Stearate

PEG-50 Stearate

3.8

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

Irritation

low

Source

synthetic

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Surfactant

PEG-55 Hydrogenated Castor Oil

PEG-55 HYDROGENATED CASTOR OIL

4.0

A gentle, effective emulsifier that helps blend oil and water in cleansers and makeup removers, with a low risk of irritation.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactantemulsifier
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Emulsifier

PEG-55 Lanolin

PEG-55 Lanolin

3.8

A gentle, water-soluble lanolin derivative that helps blend oil and water in formulas while providing light moisturizing benefits.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-6 Almond Glycerides

PEG-6 Almond Glycerides

4.0

A mild, semi-synthetic emulsifier that helps blend water and oil in skincare products while providing light skin conditioning.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-6 Butylene Glycol Laurate

PEG-6 Butylene Glycol Laurate

3.8

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

Irritation

low

Source

synthetic

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Emulsifier

PEG-6 Caprylic/Capric Glycerides

PEG-6 CAPRYLIC/CAPRIC GLYCERIDES

4.0

A gentle, water-soluble 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-6 Diisostearate

PEG-6 Diisostearate

4.0

A reliable synthetic emulsifier that helps mix oil and water in your products, generally considered safe and non-irritating at typical levels.

Irritation

low

Source

synthetic

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Emulsifier

PEG-6 Dilaurate

PEG-6 Dilaurate

3.8

PEG-6 Dilaurate is a gentle synthetic emulsifier that helps mix water and oil in your products, but it may not be ideal for very sensitive or compromised skin.

Irritation

low

Source

synthetic

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Emulsifier

PEG-6 Dioleate

PEG-6 Dioleate

3.5

A safe, effective emulsifier that helps mix oil and water in your skincare, but it's synthetic and may not suit those avoiding PEGs.

Irritation

low

Source

synthetic

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Emulsifier

PEG-6 Distearate

PEG-6 Distearate

3.5

A safe, widely used emulsifier that helps keep your products smooth and stable, but it's synthetic and may not appeal to those seeking natural-only formulas.

Irritation

low

Source

synthetic

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Emulsifier

PEG-6 Glyceryl Isostearate

PEG-6 Glyceryl Isostearate

4.0

A gentle emulsifier that helps create stable, creamy textures without heavy irritation or clogging.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-6 Glyceryl Tristearate

PEG-6 Glyceryl Tristearate

4.0

A gentle, PEG-based emulsifier that helps create stable, creamy textures in skincare without significant irritation or pore-clogging risk.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-6 Hydrogenated Castor Oil

PEG-6 Hydrogenated Castor Oil

4.0

A gentle emulsifier that helps oils and water mix, making cleansers and toners feel smooth without heavy residue.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-6 Isopalmitate

PEG-6 Isopalmitate

3.8

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

Irritation

low

Source

synthetic

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Emulsifier

PEG-6 Oleate

PEG-6 Oleate

3.5

PEG-6 Oleate is a safe, widely used emulsifier that helps products feel smooth and spread evenly, but it may be less ideal for very sensitive or compromised skin due to potential penetration enhancement.

Irritation

low

Source

synthetic

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Emulsifier

PEG-6 Olive Glycerides

PEG-6 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-6 Palm Esters

HYDROGENATED PALM/PALM KERNEL OIL PEG-6 ESTERS

3.5

A gentle emulsifier that helps create stable, creamy textures, but its palm-derived origin raises sustainability concerns.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-6 Palmitate

PEG-6 Palmitate

3.5

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

Irritation

low

Source

synthetic

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Emulsifier

PEG-6 Sorbitan Oleate

PEG-6 Sorbitan Oleate

3.8

A gentle emulsifier that helps mix water and oil, generally well-tolerated but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-6 Sorbitan Stearate

PEG-6 Sorbitan Stearate

4.0

A gentle, widely used emulsifier that helps keep your lotions and creams smooth and stable without irritating most skin types.

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-60 Corn Glycerides

PEG-60 Corn Glycerides

4.0

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

Irritation

low

Source

semi-synthetic

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Emulsifier

PEG-60 Glyceryl Diisostearate

PEG-60 Glyceryl Diisostearate

4.0

A reliable synthetic emulsifier that helps create smooth, stable creams and lotions with low irritation potential.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-60 Glyceryl Isostearate

PEG-60 Glyceryl Isostearate

3.8

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

Irritation

low

Source

synthetic

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Emulsifier

PEG-60 Glyceryl Stearate

PEG-60 Glyceryl Stearate

4.0

A gentle, widely used emulsifier that helps water and oil mix in your skincare products without causing irritation or clogging pores.

Irritation

low

Source

synthetic

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Emulsifier

PEG-60 Glyceryl Trioleate

PEG-60 Glyceryl Trioleate

3.8

PEG-60 Glyceryl Trioleate is a gentle emulsifier that helps blend oil and water in cleansers and makeup removers, but its PEG component raises mild environmental and purity concerns.

Irritation

low

Source

semi-synthetic

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