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-10 Sorbitan Laurate

PEG-10 Sorbitan Laurate

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-10 Soy Sterol

PEG-10 SOY STEROL

4.0

PEG-10 Soy Sterol is a mild, plant-derived emulsifier that helps blend oil and water in skincare products while adding a soft, non-greasy feel.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Surfactant

PEG-10 Soyamine

PEG-10 Soyamine

3.5

PEG-10 Soyamine is an effective emulsifier but may be moderately irritating and comedogenic, so it's best suited for rinse-off products.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Emulsifier

PEG-10 Stearamide

PEG-10 Stearamide

3.5

A synthetic helper ingredient that keeps oil and water mixed, but offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-10 Stearamine

PEG-10 Stearamine

3.5

PEG-10 Stearamine is a synthetic emulsifier that helps mix oil and water in products, but it may be moderately irritating or comedogenic for sensitive or acne-prone skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Antistatic Agent

PEG-10 Stearyl Benzonium Chloride

PEG-10 Stearyl Benzonium Chloride

3.5

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

Irritation

moderate

Source

synthetic

beautyskincarehaircaresurfactant
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Emulsifier

PEG-10 Sunflower Glycerides

PEG-10 Sunflower Glycerides

4.0

A gentle, sunflower-derived emulsifier that helps create stable, creamy formulas without common irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-10 Tallate

PEG-10 TALLATE

3.5

PEG-10 Tallate is a cleansing and emulsifying ingredient derived from tall oil, but its PEG component and potential impurities raise mild safety considerations for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

PEG-10 Tallow Aminopropylamine

PEG-10 TALLOW AMINOPROPYLAMINE

2.5

A semi-synthetic surfactant and conditioner that can improve texture but may cause irritation or clog pores in sensitive or acne-prone skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Emulsifier

PEG-10 Tsubakiate Glycerides

PEG-10 Tsubakiate Glycerides

4.0

A gentle, semi-synthetic emulsifier derived from camellia oil that helps blend water and oil in your products without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-100 Castor Oil

PEG-100 Castor Oil

3.8

PEG-100 Castor Oil is a reliable emulsifier that helps mix oil and water in cleansers and creams, but it may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emollient

PEG-100 Lanolin

PEG-100 Lanolin

3.5

PEG-100 Lanolin is a water-friendly version of lanolin that softens skin and helps blend oil and water, but it may clog pores for some and raises concerns about potential impurities from the PEG process.

Irritation

low

Source

semi-synthetic

beautyskincareemollientemulsifier
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Skin-conditioning agent

PEG-100 Melittin Amide

METHOXY PEG-100 PROPYL MELITTIN AMIDE

3.5

A lab-made peptide inspired by bee venom that aims to smooth and firm skin, but human research is very limited.

Irritation

low

Source

synthetic

beautyskincarepeptide
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Film Former

PEG-100 Polycaprolactone

METHOXY PEG-100/POLYEPSILON CAPROLACTONE

3.8

A synthetic polymer that helps products spread smoothly and leaves a light, flexible film on skin or hair.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

PEG-100 Polycaprolactone Ethylhexanoate

METHOXY PEG-100/POLYEPSILON CAPROLACTONE ETHYLHEXANOATE

3.5

A synthetic polymer that helps products spread smoothly and feel lightweight, but its PEG component raises mild environmental and purity concerns.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Skin Conditioning

PEG-100 Polycaprolactone Palmitate

METHOXY PEG-100/POLYEPSILON CAPROLACTONE PALMITATE

3.8

A gentle film-forming polymer that helps ingredients spread smoothly and leaves skin feeling soft without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emulsifier

PEG-100 Stearate

PEG-100 Stearate

3.8

A widely used synthetic emulsifier that helps create stable, smooth creams but may be less ideal for very sensitive or acne-prone skin in high concentrations.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Film Former

PEG-100/IPDI Copolymer

PEG-100/IPDI Copolymer

3.5

A synthetic polymer that helps products stay put longer, especially in water-resistant formulas.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Emulsifier

PEG-11 Avocado Glycerides

PEG-11 Avocado Glycerides

4.0

A gentle emulsifier that helps blend oil and water while adding a touch of avocado-derived nourishment.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-11 Babassu Glycerides

PEG-11 Babassu Glycerides

4.0

A mild, plant-based emulsifier that helps blend oil and water in skincare formulas while leaving skin feeling soft.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Surfactant

PEG-11 Castor Oil

PEG-11 Castor Oil

3.8

PEG-11 Castor Oil is a gentle emulsifier that helps blend oil and water in cleansers and shampoos, but its PEG component raises mild environmental and purity concerns.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-11 Cocamide

PEG-11 Cocamide

3.5

An effective cleansing agent that can be drying or irritating for sensitive skin, best suited for rinse-off formulas.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-11 Cocoa Butter Glycerides

PEG-11 Cocoa Butter Glycerides

4.0

A gentle, PEG-modified cocoa butter derivative that helps blend oil and water in formulas while adding a touch of cocoa butter's moisturizing feel.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PEG-11 Lauramide

PEG-11 Lauramide

3.5

A synthetic surfactant that helps cleanse and emulsify, but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-11 Methyl Ether Dimethicone

PEG-11 METHYL ETHER DIMETHICONE

4.0

A gentle silicone emulsifier that improves product texture and spreadability without common silicone downsides.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-11 Oleate

PEG-11 Oleate

3.5

PEG-11 Oleate is a synthetic emulsifier that helps mix oil and water in products, but it may be mildly irritating for sensitive skin and has moderate comedogenic potential.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-11 Tallow Amine

PEG-11 Tallow Amine

3.0

PEG-11 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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Film Former

PEG-114 Polycaprolactone Copolymer

BIS-METHOXY PEG-114 POLYCAPROLACTONE DIOL/IPDI COPOLYMER

3.8

A synthetic film-former that helps makeup and skincare last longer and feel smoother, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film-Former

PEG-114 Polylactic Acid

PEG-114 Polylactic Acid

3.8

A gentle film-forming ingredient that helps lock in moisture and improve product texture, but research on its long-term effects is still limited.

Irritation

low

Source

semi-synthetic

beautyskincarefilm-former
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Thickener

PEG-115M

PEG-115M

4.0

PEG-115M is a gentle synthetic thickener that gives products a smooth, silky feel without clogging pores or causing irritation.

Irritation

low

Source

synthetic

beautyskincarethickener
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Film-Forming Agent

PEG-1182 Methyl Ester Sericin

PEG-1182 METHYL ESTER SERICIN

3.8

A modified silk protein that forms a lightweight film on skin, offering temporary smoothing and moisture retention, but with limited independent research on this specific PEGylated form.

Irritation

low

Source

semi-synthetic

beautyskincarefilm-forming agent
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Film Former

PEG-12 Allyl Ether

PEG-12 ALLYL ETHER

3.5

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

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Emulsifier

PEG-12 Beeswax

PEG-12 Beeswax

3.8

PEG-12 Beeswax is a gentle emulsifier that helps blend oil and water in skincare products, but its PEG component raises mild environmental and purity concerns.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emollient

PEG-12 Carnauba

PEG-12 Carnauba

3.8

A gentle, water-friendly wax that helps products feel smooth and spread easily without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Surfactant

PEG-12 Cocamine

PEG-12 Cocamine

3.5

An effective cleansing and emulsifying ingredient, but may cause irritation for sensitive skin due to its surfactant nature.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-12 Diisostearate

PEG-12 Diisostearate

4.0

A reliable synthetic emulsifier that helps mix oil and water in skincare, generally well-tolerated but may not suit those avoiding PEGs.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-12 Dilaurate

PEG-12 Dilaurate

3.5

PEG-12 Dilaurate is a safe, widely used emulsifier that helps products spread smoothly, but it may not suit those avoiding synthetic ingredients.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PEG-12 Dimethicone

PEG-12 Dimethicone

4.0

A gentle silicone that smooths skin and hair without heavy greasiness, but may not suit those avoiding silicones entirely.

Irritation

low

Source

semi-synthetic

beautyskincarehaircareemollient
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Film Former

PEG-12 Dimethicone Crosspolymer

PEG-12 Dimethicone Crosspolymer

4.0

A gentle silicone polymer that creates a smooth, velvety feel on skin without clogging pores or causing irritation.

Irritation

low

Source

synthetic

beautyskincarefilm former
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Emulsifier

PEG-12 Dioleate

PEG-12 Dioleate

3.8

PEG-12 Dioleate is a reliable emulsifier that helps mix oil and water, but its production may involve trace impurities that some people prefer to avoid.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Surfactant

PEG-12 Ditallate

PEG-12 Ditallate

3.5

PEG-12 Ditallate is a synthetic cleanser ingredient that effectively removes dirt and oil, but may be slightly drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-12 Glyceryl Dimyristate

PEG-12 Glyceryl Dimyristate

3.5

A reliable synthetic emulsifier that helps create stable, creamy formulas, but its PEG component raises minor purity concerns for sensitive skin.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-12 Glyceryl Dioleate

PEG-12 Glyceryl Dioleate

3.5

A synthetic emulsifier that helps blend oils 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-12 Glyceryl Distearate

PEG-12 Glyceryl Distearate

3.8

A reliable synthetic emulsifier that helps blend oil and water in creams and lotions, with a low risk of irritation for most skin types.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-12 Glyceryl Laurate

PEG-12 Glyceryl Laurate

3.8

A gentle synthetic emulsifier that helps create stable, creamy formulas without heavy irritation.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-12 Glyceryl Linoleate

PEG-12 Glyceryl Linoleate

4.0

A gentle synthetic emulsifier that helps blend oil and water in formulas while providing mild skin conditioning from linoleic acid.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-12 Isostearate

PEG-12 Isostearate

3.8

PEG-12 Isostearate is a safe, effective emulsifier that helps products feel smooth, but its PEG origin raises mild environmental and purity concerns.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

PEG-12 Lanolate

PEG-12 Lanolate

3.5

PEG-12 Lanolate is a gentle, water-friendly lanolin derivative that helps blend oil and water in formulas, but it may clog pores for some and raises environmental concerns due to PEGs.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-12 Laurate

PEG-12 Laurate

3.5

PEG-12 Laurate is a synthetic emulsifier that helps mix oil and water, but may be mildly irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-12 Palm Kernel Glycerides

PEG-12 PALM KERNEL GLYCERIDES

3.8

A gentle emulsifier that helps blend oil and water in skincare formulas, but its PEG backbone raises mild environmental and purity concerns.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Surfactant

PEG-12 Palmitamine

PEG-12 Palmitamine

3.5

PEG-12 Palmitamine is a synthetic emulsifier that helps mix oil and water, but it may cause irritation or clog pores for sensitive or acne-prone skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-12 Sorbitan Trioleate

PEG-12 Sorbitan Trioleate

3.5

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review