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

Emulsifier

PEG-60 Tsubakiate Glycerides

PEG-60 Tsubakiate Glycerides

4.0

A gentle, camellia-derived emulsifier that helps blend oil and water while leaving skin feeling soft and conditioned.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-65 Butylene Glycol Isostearate

PEG-65 Butylene Glycol Isostearate

3.5

A synthetic emulsifier that helps mix water and oil in products, generally well-tolerated but with limited research on long-term skin effects.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PEG-65 Hydrogenated Castor Oil

PEG-65 HYDROGENATED CASTOR OIL

3.8

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Thickener

PEG-65M

PEG-65M

3.8

PEG-65M is a safe, synthetic thickener that improves product texture and feel without common irritation concerns.

Irritation

low

Source

synthetic

beautyskincarethickener
Read ingredient review

Emulsifier

PEG-66 Trihydroxystearin

PEG-66 Trihydroxystearin

4.0

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PEG-7 Beta-Naphthol

PEG-7 Beta-Naphthol

3.0

A synthetic surfactant that helps cleanse but may cause irritation for sensitive skin; not a common or well-studied ingredient in modern skincare.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PEG-7 Caprylic/Capric Glycerides

PEG-7 Caprylic/Capric Glycerides

4.0

A gentle, water-friendly emollient that helps hydrate and soften skin without clogging pores, commonly used in rinse-off and leave-on products.

Irritation

low

Source

semi-synthetic

beautyskincareemollientsurfactant
Read ingredient review

Surfactant

PEG-7 Cocamide

PEG-7 Cocamide

3.8

A gentle, coconut-derived cleansing agent that helps products foam and rinse cleanly, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PEG-7 Cocoglycerides

PEG-7 Cocoglycerides

4.0

A gentle, water-friendly emollient that helps cleanse without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emollient

PEG-7 Cupuaçu Butter Glycerides

PEG-7 Theobroma Grandiflorum Seed Butter Glyceryl Esters

4.0

A gentle, PEG-modified butter that cleanses without stripping and leaves skin soft—great for sensitive types.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emollient

PEG-7 Dimethicone

PEG-7 Dimethicone

4.0

A gentle, water-soluble silicone that makes products feel silky without heavy buildup.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Conditioning Agent

PEG-7 Dimethicone Panthenyl Phosphate

POTASSIUM DIMETHICONE PEG-7 PANTHENYL PHOSPHATE

4.0

A gentle silicone derivative that conditions hair and skin while adding a touch of moisture from panthenol (provitamin B5).

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
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Emulsifier

PEG-7 Glyceryl Cocoate

PEG-7 Glyceryl Cocoate

4.0

A gentle, coconut-derived emulsifier that helps blend oil and water in cleansers without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-7 Glyceryl Laurate

PEG-7 Glyceryl Laurate

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PEG-7 Glyceryl Soyate

PEG-7 Glyceryl Soyate

4.0

A gentle, non-stripping surfactant derived from soybean oil that effectively cleanses while respecting the skin barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agent
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Emulsifier

PEG-7 Hydrogenated Castor Oil

PEG-7 HYDROGENATED CASTOR OIL

4.0

A reliable, low-irritation emulsifier that helps rinse away oil-based impurities without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PEG-7 Lanolate

PEG-7 Lanolate

3.8

A gentle, water-soluble lanolin derivative that softens skin and helps cleanse without stripping, but may clog pores for some.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emollient

PEG-7 Methyl Ether

PEG-7 METHYL ETHER

4.0

A gentle, water-loving synthetic ingredient that softens skin and helps other ingredients spread evenly.

Irritation

low

Source

synthetic

beautyskincarehumectant
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Emollient

PEG-7 Methyl Ether Dimethicone

PEG-7 METHYL ETHER DIMETHICONE

4.0

A gentle, water-soluble silicone that helps products glide on smoothly without a heavy or greasy feel.

Irritation

low

Source

semi-synthetic

beautyskincareconditioning agent
Read ingredient review

Emulsifier

PEG-7 Oleamide

PEG-7 Oleamide

3.8

PEG-7 Oleamide is a gentle synthetic emulsifier that helps blend oil and water in cleansers and lotions, but its PEG component raises mild environmental concerns.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-7 Oleate

PEG-7 Oleate

3.5

PEG-7 Oleate is a synthetic emulsifier that helps mix oil and water, but it may be mildly irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-7 Olivate

PEG-7 Olivate

4.0

A gentle, olive-derived emulsifier that helps rinse away oil and makeup without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

PEG-7 Olive Glycerides

PEG-7 OLIVE GLYCERIDES

4.0

A mild, olive-derived emulsifier that helps cleanse and condition skin without stripping natural oils.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PEG-7 Propylheptyl Ether

PEG-7 PROPYLHEPTYL ETHER

3.8

A gentle synthetic emollient that improves product feel without heavy residue, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Surfactant

PEG-7 Ricinoleamide

PEG-7 Ricinoleamide

3.5

A gentle cleansing ingredient that helps mix oil and water, but is rarely the star of the show.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-7 Ricinoleate

PEG-7 Ricinoleate

4.0

A gentle, castor-oil-derived cleansing agent that helps remove dirt and oil without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Antioxidant

PEG-7 Rutinyl Succinate

METHOXY PEG-7 RUTINYL SUCCINATE

4.0

A gentle, water-soluble antioxidant that helps protect skin from environmental damage and may support a brighter, more even tone.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Emulsifier

PEG-7 Sunflower Glycerides

PEG-7 Sunflower Glycerides

4.2

A mild, sunflower-derived emulsifier that helps blend oil and water in cleansers and creams, with low irritation potential.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PEG-7 Tallow Amine

PEG-7 Tallow Amine

3.5

PEG-7 Tallow Amine is an effective emulsifier but may be moderately irritating and comedogenic, and its animal-derived origin raises concerns for some users.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PEG-70 Hydrogenated Lanolin

PEG-70 Hydrogenated Lanolin

3.8

A gentle, water-friendly lanolin derivative that hydrates and softens skin without the heavy feel of traditional lanolin.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PEG-70 Lanolin

PEG-70 Lanolin

3.8

PEG-70 Lanolin is a modified lanolin that adds water-loving properties, making it a gentle emulsifier and skin softener, but it may raise concerns about ethoxylation byproducts.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emollient

PEG-70 Mango Glycerides

PEG-70 MANGO GLYCERIDES

4.0

A gentle, water-soluble emollient from mango oil that adds softness without greasiness, ideal for rinse-off products.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PEG-75 Beta-Sitosterol

PEG-75 Beta-Sitosterol

4.0

A gentle, water-soluble emulsifier derived from plant sterols that helps blend oil and water phases in skincare, with mild skin-conditioning benefits.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-75 Castor Oil

PEG-75 Castor Oil

3.8

A gentle, water-soluble emulsifier that helps mix oil and water in cleansers and makeup removers, but may be drying for very sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-75 Dilaurate

PEG-75 Dilaurate

3.5

PEG-75 Dilaurate is a safe, widely used emulsifier that helps mix oil and water in cleansers and lotions, but its PEG origin raises mild environmental and purity concerns.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-75 Dioleate

PEG-75 Dioleate

3.5

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-75 Distearate

PEG-75 Distearate

3.8

A safe, widely used synthetic emulsifier that helps blend oil and water in creams and lotions, but may be less ideal for very sensitive or acne-prone skin in high concentrations.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PEG-75 Lanolin

PEG-75 Lanolin

3.8

A versatile, water-friendly emollient derived from lanolin, but may be comedogenic for acne-prone skin.

Irritation

low

Source

semi-synthetic

beautyskincareemollientemulsifier
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Emollient

PEG-75 Lanolin Oil

PEG-75 Lanolin Oil

3.8

A gentle, water-friendly emollient derived from lanolin that helps soften skin and blend oil and water in formulas.

Irritation

low

Source

semi-synthetic

beautyskincareemollientemulsifier
Read ingredient review

Emollient

PEG-75 Lanolin Wax

PEG-75 Lanolin Wax

3.8

A gentle, water-friendly emollient that helps soften skin and stabilize formulas, but may clog pores for some.

Irritation

low

Source

semi-synthetic

beautyskincareemollientemulsifier
Read ingredient review

Emulsifier

PEG-75 Laurate

PEG-75 Laurate

3.8

A gentle synthetic emulsifier that helps mix water and oil, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PEG-75 Meadowfoam Oil

PEG-75 MEADOWFOAM OIL

4.0

A gentle, water-soluble emollient that adds softness without greasiness, ideal for rinse-off products.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PEG-75 Shea Butter Glycerides

PEG-75 Shea Butter Glycerides

4.0

A gentle, water-friendly version of shea butter that helps blend oil and water in formulas without leaving a greasy feel.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PEG-75 Shorea Butter Glycerides

PEG-75 SHOREA BUTTER GLYCERIDES

4.0

A gentle, water-friendly emollient that softens skin without a greasy feel, commonly used in rinse-off and leave-on products.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PEG-75 Sorbitan Lanolate

PEG-75 SORBITAN LANOLATE

4.0

A gentle, water-soluble emulsifier derived from lanolin that helps blend oil and water in creams and cleansers, with a low risk of irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-75 Sorbitan Laurate

PEG-75 Sorbitan Laurate

3.8

A gentle synthetic emulsifier that helps mix water and oil, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-75 Soy Glycerides

PEG-75 SOY GLYCERIDES

4.0

A gentle, water-friendly emulsifier that helps blend oil and water in cleansers and creams, with low irritation potential.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PEG-78 Glyceryl Cocoate

PEG-78 Glyceryl Cocoate

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agent
Read ingredient review

Humectant

PEG-8

PEG-8

3.5

PEG-8 is a widely used synthetic humectant that helps products feel smooth and absorb well, but it may be contaminated with impurities in poorly refined forms.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Emollient

PEG-8 Avocadoate

PEG-8 Avocadoate

4.0

A gentle, avocado-derived emollient that helps soften skin and improve the feel of cleansers and moisturizers.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PEG-8 Behenate

PEG-8 Behenate

3.8

A reliable synthetic emulsifier that helps water and oil mix smoothly, but it offers no direct skin benefit beyond texture and stability.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-8 C12-18 Alkyl Ester

PEG-8 C12-18 Alkyl Ester

3.8

A reliable synthetic emulsifier that helps create stable, creamy formulas but offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PEG-8 Caprate

PEG-8 Caprate

3.5

PEG-8 Caprate is a mild synthetic emollient that helps products feel silky and spread easily, but it may raise concerns for those avoiding PEGs or ethoxylated ingredients.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emollient

PEG-8 Caprylate

PEG-8 Caprylate

4.0

PEG-8 Caprylate is a gentle, synthetic ingredient that helps products feel smooth and spread easily without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review