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

Emollient

PEG-8 Hydrogenated Fish Glycerides

PEG-8 Hydrogenated Fish Glycerides

3.8

A gentle, fish-derived emollient that helps moisturize and stabilize formulas, but may not suit strict vegans or those with fish allergies.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Surfactant

PEG-8 Hydrogenated Tallow Amine

PEG-8 Hydrogenated Tallow Amine

3.5

PEG-8 Hydrogenated Tallow Amine is an effective emulsifier and antistatic agent, but its derivation from animal fat and potential for irritation mean it's best suited for rinse-off products.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-8 Isolaureth-8

PEG-8 ISOLAURYL THIOETHER

3.5

A synthetic cleansing agent that helps remove dirt and oil, but may be slightly drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-8 Isostearate

PEG-8 Isostearate

3.8

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PEG-8 Lanolate

PEG-8 Lanolate

3.5

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

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PEG-8 Laurate

PEG-8 Laurate

3.5

PEG-8 Laurate is a gentle synthetic emulsifier that helps mix oil and water, but may be contaminated with impurities in low-quality grades.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-8 Linoleate

PEG-8 Linoleate

3.8

PEG-8 Linoleate 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

synthetic

beautyskincareemulsifier
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Emollient

PEG-8 Linolenate

PEG-8 Linolenate

3.8

A gentle synthetic emollient that helps soften skin and stabilize formulas, but offers no unique benefits over more common alternatives.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emollient

PEG-8 Methicone

PEG-8 Methicone

4.0

A lightweight silicone that smooths skin and hair without clogging pores, but may not suit those avoiding silicones entirely.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

PEG-8 Myristate

PEG-8 Myristate

3.8

PEG-8 Myristate is a safe, synthetic emollient that helps products feel smooth and spread easily, but it may be less ideal for those avoiding ethoxylated ingredients.

Irritation

low

Source

synthetic

beautyskincareemollient
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Surfactant

PEG-8 Palm Glycerides Carboxylate

SODIUM PEG-8 PALM GLYCERIDES CARBOXYLATE

3.8

A mild, palm-derived surfactant that cleanses without stripping the skin, but its PEG content and palm sourcing raise environmental and purity considerations.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Emulsifier

PEG-8 PG-Coco-Glucoside Dimethicone

PEG-8 PG-Coco-Glucoside Dimethicone

3.8

A gentle silicone emulsifier that helps products feel silky and spread easily, but it's not biodegradable and may not suit those avoiding silicones.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-8 Phosphate

PEG-8 Phosphate

3.5

PEG-8 Phosphate is a synthetic emulsifier that helps mix oil and water in cleansers and creams, but may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-8 PPG-8 Dimethicone

PEG-8 PPG-8 Dimethicone

4.0

A gentle silicone emulsifier that improves product texture and spreadability without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PEG-8 Raspberriate

PEG-8 Raspberriate

3.8

A gentle, semi-synthetic emollient derived from raspberry seed oil that helps soften and condition skin without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PEG-8 Ricinoleate

PEG-8 Ricinoleate

3.8

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-8 Sesquilaurate

PEG-8 Sesquilaurate

3.5

A safe, effective emulsifier that helps mix water and oil in your skincare, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-8 Sesquioleate

PEG-8 Sesquioleate

3.8

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PEG-8 Soyamine

PEG-8 Soyamine

3.5

PEG-8 Soyamine is a semi-synthetic emulsifier that helps mix oil and water in cleansers, but it may be moderately irritating for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-8 Tallate

PEG-8 TALLATE

3.5

PEG-8 Tallate is a reliable emulsifier that helps mix oil and water, but its production involves ethoxylation, which may raise purity concerns for some users.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-8 Tallow Amide

PEG-8 TALLOW AMIDE

3.5

PEG-8 Tallow Amide is a foaming cleanser ingredient that works well but may be irritating for sensitive skin and is not vegan-friendly.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PEG-8 Trisiloxane

PEG-8 Trisiloxane

4.0

PEG-8 Trisiloxane is a lightweight silicone that helps products glide on smoothly without a greasy feel, but it may not suit everyone due to potential buildup or sensitivity to silicones.

Irritation

low

Source

synthetic

beautyskincareemollientsurfactant
Read ingredient review

Emollient

PEG-8 Tucuma Oil Esters

ASTROCARYUM VULGARE OIL PEG-8 ESTERS

4.0

A gentle, water-friendly emollient that helps cleansers feel moisturizing without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

PEG-8 Undecylenate

PEG-8 Undecylenate

4.0

A gentle, castor-oil-derived surfactant that cleanses without stripping the skin, making it a solid choice for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agent
Read ingredient review

Film Former

PEG-8/SMDI Copolymer

PEG-8/SMDI Copolymer

3.8

A synthetic film-former that helps makeup and sunscreen stay put longer, but offers no active skincare benefit.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Surfactant

PEG-80 Betulinate

PEG-80 Betulinate

4.0

A gentle, plant-derived surfactant that cleanses without stripping the skin, suitable for sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-80 Castor Oil

PEG-80 Castor Oil

3.5

PEG-80 Castor Oil is a gentle cleansing agent that helps remove dirt and makeup, but it may cause irritation for very sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

PEG-80 Glyceryl Cocoate

PEG-80 GLYCERYL COCOATE

4.0

A gentle, coconut-derived surfactant that helps cleanse without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

PEG-80 Glyceryl Tallowate

PEG-80 Glyceryl Tallowate

3.5

A gentle cleansing agent that helps foam and rinse away dirt, but may be drying for very sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

PEG-80 Hydrogenated Glyceryl Palmate

PEG-80 Hydrogenated Glyceryl Palmate

3.8

A gentle cleansing agent that helps rinse away dirt and oil without stripping the skin, but it's processed with PEGs, which some people prefer to avoid.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

PEG-80 Methyl Glucose Laurate

PEG-80 METHYL GLUCOSE LAURATE

4.0

A gentle, low-irritation surfactant that cleanses effectively while being kinder to sensitive skin than many traditional sulfates.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

PEG-80 Sorbitan Laurate

PEG-80 Sorbitan Laurate

4.0

A gentle, water-soluble surfactant that helps cleanse without stripping the skin, making it a popular choice for sensitive-skin formulas.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

PEG-80 Sorbitan Palmitate

PEG-80 Sorbitan Palmitate

3.8

A gentle, PEG-based emulsifier that helps cleansers foam and rinse cleanly, but may raise environmental concerns due to its PEG content.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Emulsifier

PEG-80 Stearate

PEG-80 Stearate

3.8

A gentle synthetic emulsifier that helps mix water and oil, generally safe for most skin types.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-82 Glyceryl Tallowate

PEG-82 Glyceryl Tallowate

3.5

A workhorse emulsifier that helps oil and water mix, but its animal-derived origin and potential for ethoxylation impurities may give some users pause.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PEG-85 Lanolin

PEG-85 Lanolin

3.8

A water-friendly version of lanolin that softens skin and helps blend oils and water, but may not suit those with wool allergies or sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincareemollientsurfactant
Read ingredient review

Emulsifier

PEG-9 Avocadoate

PEG-9 Avocadoate

3.8

A gentle emulsifier derived from avocado oil that helps blend water and oil in formulas, with low irritation potential.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-9 Borageate

PEG-9 Borageate

3.8

PEG-9 Borageate is a gentle emulsifier that helps blend water and oil in skincare, with mild skin-conditioning benefits from borage seed oil.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-9 Butylene Glycol Laurate

PEG-9 Butylene Glycol Laurate

4.0

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PEG-9 Butyloctanoate

PEG-9 Butyloctanoate

3.8

A gentle synthetic emollient that helps products feel silky and spread smoothly without heavy greasiness.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PEG-9 Castor Oil

PEG-9 Castor Oil

3.8

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-9 Cocoate

PEG-9 Cocoate

3.8

PEG-9 Cocoate is a gentle cleansing and emulsifying ingredient, but those with sensitive skin may want to patch-test due to potential mild irritation.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-9 Cocoglycerides

PEG-9 Cocoglycerides

4.0

A gentle, coconut-derived emulsifier that helps mix water and oil in cleansers and creams, with low irritation potential.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Antistatic Agent

PEG-9 Diethylmonium Chloride

PEG-9 Diethylmonium Chloride

3.8

A synthetic conditioning agent that helps reduce static and soften hair, generally considered safe for most people.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

PEG-9 Dimethacrylate

PEG-9 Dimethacrylate

3.5

PEG-9 Dimethacrylate is a synthetic polymer that helps nail and makeup products form a durable, glossy film, but it has limited skin benefits and may cause sensitivity in some users.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Emulsifier

PEG-9 Dimethicone

PEG-9 Dimethicone

4.0

A gentle silicone emulsifier that improves product texture and spreadability without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Skin conditioning agent

PEG-9 Dinicotinate

PEG-9 Dinicotinate

3.5

PEG-9 Dinicotinate is a synthetic derivative of niacin (vitamin B3) that may support skin microcirculation and barrier function, but research is limited and it's less common than niacinamide.

Irritation

low

Source

synthetic

beautyskincareconditioning agent
Read ingredient review

Emulsifier

PEG-9 Distearate

PEG-9 Distearate

3.8

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-9 Glyceryl Isostearate

PEG-9 Glyceryl Isostearate

3.8

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-9 Glyceryl Laurate

PEG-9 Glyceryl Laurate

4.0

A gentle emulsifier that helps mix water and oil, generally well-tolerated and safe for most skin types.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review