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 1,097
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

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

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

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

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

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

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

Surfactant

PEG-8 Castor Oil

PEG-8 Castor Oil

3.8

PEG-8 Castor Oil is a gentle cleansing and emulsifying ingredient that helps blend oil and water, but it may cause mild irritation for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-8 Cocamine

PEG-8 Cocamine

3.5

PEG-8 Cocamine is a mild cleansing and emulsifying ingredient, but it may cause irritation for sensitive skin types.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-8 Hemp Seedate

CANNABIS SATIVA SEED OIL PEG-8 ESTERS

4.0

A gentle, water-friendly version of hemp seed oil that helps cleanse without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

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 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 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

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

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 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
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 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 Laurate

PEG-9 Laurate

3.5

PEG-9 Laurate is a workhorse emulsifier that helps mix oil and water, but may cause irritation for sensitive skin in high concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-9 Oleamide

PEG-9 OLEAMIDE

3.5

PEG-9 Oleamide is a synthetic emulsifier that helps mix oil and water in cleansers, but it may be mildly irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-9 Oleate

PEG-9 Oleate

3.5

PEG-9 Oleate is a workhorse emulsifier that helps mix oil and water, but it may be slightly drying or irritating for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-9 Ricinoleate

PEG-9 Ricinoleate

3.8

PEG-9 Ricinoleate is a mild emulsifier that helps mix water and oil in cleansers and creams, but its PEG component raises minor purity concerns for some users.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-9 Soyate

PEG-9 Soyate

4.0

A gentle, plant-derived surfactant that helps cleanse without stripping the skin, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG/PPG Alcohol Blend

PEG-4-PPG-7 C13/C15 Alcohol

3.5

A synthetic emulsifier that helps mix oil and water, but may be slightly drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG/PPG-14/2 Propylheptyl Ether

PEG/PPG-14/2 Propylheptyl Ether

3.8

A synthetic emulsifier that helps mix oil and water in products, generally well-tolerated but not a standout active ingredient.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG/PPG-20/20 Copolymer

PEG/PPG-20/20 Copolymer

3.8

A gentle synthetic polymer that helps blend oil and water in formulas, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG/PPG-4/2 Propylheptyl Ether

PEG/PPG-4/2 Propylheptyl Ether

3.8

A synthetic emulsifier that helps mix oil and water in skincare, generally well-tolerated but not a star active ingredient.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Thickener

PEG/PPG-450/50 TMP Lauryl Ether

PEG/PPG-450/50 TRIMETHYLOLPROPANE LAURYL ETHER

3.8

A synthetic thickener that helps create rich, stable textures in cleansers and lotions, generally well-tolerated but not biodegradable.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG/PPG-50/40 Copolymer

PEG/PPG-50/40 Copolymer

3.5

A gentle synthetic polymer that helps blend oil and water, making cleansers and lotions feel smooth without heavy irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG/PPG-6/2 Propylheptyl Ether

PEG/PPG-6/2 Propylheptyl Ether

3.8

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG/PPG-7/2 Propylheptyl Ether

PEG/PPG-7/2 Propylheptyl Ether

3.8

A gentle synthetic emulsifier that helps mix oil and water in skincare, generally well-tolerated but not a star active ingredient.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Solubilizer

Pentadoxynol-200

Pentadoxynol-200

4.0

A gentle synthetic solubilizer that helps blend oils and water in cleansers and makeup removers, with a low irritation profile.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Perfluoroalkyl Phosphate

AMP-C8-18 PERFLUOROALKYLETHYL PHOSPHATE

3.5

A synthetic ingredient that helps sunscreen spread evenly and stay on the skin longer, but belongs to a chemical family under environmental scrutiny.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Perfluorohexyl Ethylphosphonic Acid

PERFLUOROHEXYL ETHYLPHOSPHONIC ACID

3.0

A synthetic fluorinated surfactant that helps products spread and resist water, but its safety and environmental impact are not fully understood.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Poloxamer 101

Poloxamer 101

4.0

A gentle synthetic emulsifier that helps mix oil and water in skincare formulas without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Poloxamer 105

Poloxamer 105

4.0

Poloxamer 105 is a gentle synthetic ingredient that helps mix oil and water, making products feel smooth and spread easily without irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Poloxamer 105 Benzoate

Poloxamer 105 Benzoate

3.8

Poloxamer 105 Benzoate is a gentle synthetic surfactant that helps cleanse without stripping the skin, but it offers no direct skin benefits beyond cleansing.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Poloxamer 108

Poloxamer 108

4.0

Poloxamer 108 is a gentle synthetic ingredient that helps cleansers foam and rinse clean without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Poloxamer 122

Poloxamer 122

3.8

Poloxamer 122 is a gentle synthetic emulsifier that helps blend oil and water in cleansers and lotions, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Poloxamer 123

Poloxamer 123

4.0

A mild synthetic emulsifier that helps mix oil and water in cleansers and lotions, with a low irritation profile.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Poloxamer 124

Poloxamer 124

4.0

Poloxamer 124 is a gentle synthetic ingredient that helps mix oil and water, making cleansers effective without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review