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

Disodium Oleyl Phosphate

Disodium Oleyl Phosphate

4.0

A gentle, phosphate-based surfactant that effectively cleanses without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Disodium PEG-8 Ricinosuccinate

DISODIUM PEG-8 RICINOSUCCINATE

3.5

A mild synthetic cleanser that helps remove dirt and oil without stripping the skin, but may cause irritation for very sensitive skin types.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Disodium Stearoamphodiacetate

Disodium Stearoamphodiacetate

4.0

A gentle, non-stripping cleanser that helps maintain skin's moisture barrier while effectively removing dirt and oil.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Disoyamine

DISOYAMINE

3.5

Disoyamine is a functional surfactant that helps cleansers foam and rinse cleanly, but it may be slightly drying or irritating for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Disteareth-5 Lauroyl Glutamate

DISTEARETH-5 LAUROYL GLUTAMATE

4.0

A mild, amino-acid-derived surfactant that cleanses without stripping the skin, making it ideal for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Dodoxynol-12

Dodoxynol-12

3.5

Dodoxynol-12 is a synthetic emulsifier that helps cleanse and stabilize formulas, but it may be slightly drying or irritating for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Dodoxynol-13

Dodoxynol-13

3.8

Dodoxynol-13 is a synthetic cleansing agent that helps remove dirt and oil, but may be slightly drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Dodoxynol-5

Dodoxynol-5

3.5

Dodoxynol-5 is a synthetic cleansing agent that helps remove dirt and oil, but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Dodoxynol-6

Dodoxynol-6

3.5

Dodoxynol-6 is a synthetic cleansing agent that helps remove dirt and oil, but it may be slightly drying or irritating for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Dodoxynol-7

Dodoxynol-7

3.5

Dodoxynol-7 is a synthetic cleansing agent that helps products foam and remove dirt, but it may be slightly drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Dodoxynol-9

DODOXYNOL-9

3.5

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Antistatic Agent

Epoxypropyl Lauryldimonium Chloride

2,3-EPOXYPROPYL LAURYLDIMONIUM CHLORIDE

3.5

A synthetic conditioning agent that reduces static and softens hair, but may cause irritation for sensitive scalps.

Irritation

moderate

Source

synthetic

beautyhaircaresurfactant
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Viscosity Controlling

Ethylene Dioleamide

ETHYLENE DIOLEAMIDE

3.0

Ethylene Dioleamide is a synthetic thickener and opacifier used mainly in rinse-off products; it is generally considered safe but has limited direct skin benefit.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Fermented Sucrose Ester Complex

CANDIDA BOMBICOLA/SUCROSE/VEGETABLE ACID ESTER FERMENT

4.0

A gentle, yeast-fermented cleanser that removes dirt without stripping the skin's natural moisture barrier.

Irritation

low

Source

biotech

beautyskincaresurfactant
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Surfactant

Fluorinated PEG Phosphate

POLYPERFLUOROETHOXYMETHOXY DIFLUOROETHYL PEG PHOSPHATE

3.5

A synthetic fluorinated ingredient that helps products spread smoothly and resist water, but raises environmental persistence concerns.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Fluoroalcohol Phosphate

C8-18 FLUOROALCOHOL PHOSPHATE

3.0

A fluorinated surfactant that improves water and oil resistance but raises environmental persistence concerns.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Emollient

Glycereth-20 Cocoate

GLYCERETH-20 COCOATE

4.0

A mild, coconut-derived ingredient that softens skin and helps cleansers foam without stripping moisture.

Irritation

low

Source

semi-synthetic

beautyskincareemollientsurfactant
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Emollient

Glycereth-26 Caprylate

GLYCERETH-26 CAPRYLATE

4.0

A gentle, water-loving emollient that softens skin and helps other ingredients spread evenly without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollientsurfactant
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Emollient

Glycereth-6 Laurate

GLYCERETH-6 LAURATE

4.0

A gentle, water-loving emollient that softens skin and helps cleansers feel less stripping, with a low risk of irritation or clogged pores.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Glyceryl Lauryl Ether

GLYCERYL LAURYL ETHER

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Heptyl Glucoside

Heptyl Glucoside

4.5

A gentle, biodegradable surfactant that effectively cleanses without stripping the skin's natural moisture barrier.

Irritation

low

Source

natural

beautyskincaresurfactant
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Surfactant

Hexeth-5

HEXETH-5

3.8

Hexeth-5 is a mild synthetic emulsifier that helps mix oil and water, but may cause irritation for very sensitive skin at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Hexyldeceth-2

Hexyldeceth-2

4.0

Hexyldeceth-2 is a gentle, synthetic surfactant that helps cleanse without stripping the skin, making it a good choice for sensitive formulas.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Hexyldeceth-20

Hexyldeceth-20

4.0

Hexyldeceth-20 is a gentle, effective emulsifier and cleanser that helps mix oil and water without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Emulsifier

Hydrogenated Castor Oil Ethoxylate

PEG-40 HYDROGENATED CASTOR OIL

4.0

A reliable, low-irritation emulsifier that helps mix oil and water in your skincare products, but may feel slightly heavy on very oily skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Hydrogenated Tallow Betaine

Hydrogenated Tallow Betaine

4.0

A mild, animal-derived surfactant that cleans effectively without over-drying, suitable for sensitive skin.

Irritation

low

Source

natural

beautyskincaresurfactant
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Surfactant

Hydrogenated Tallowamide DEA

Hydrogenated Tallowamide DEA

3.5

A traditional foam booster and emulsifier that can be effective but may cause irritation or clog pores in sensitive or acne-prone skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Antistatic Agent

Hydrogenated Tallowamine

Hydrogenated Tallowamine

3.0

An effective hair conditioner and antistatic agent, but its animal origin and potential for irritation make it less common in modern clean beauty.

Irritation

moderate

Source

natural

beautyskincaresurfactant
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Surfactant

Hydrogenated Tallowamine Oxide

Hydrogenated Tallowamine Oxide

3.5

An effective foaming agent from animal-derived tallow, but may be too stripping for dry or sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Emulsifier

Hydrogenated Talloweth-25

Hydrogenated Talloweth-25

3.5

A gentle emulsifier that helps mix water and oil, but its animal-derived origin may not suit everyone.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Hydrolyzed Palm Sophorolipids

Hydrolyzed Palm Sophorolipids

4.0

A mild, biodegradable surfactant that cleanses without stripping the skin, making it a great choice for sensitive or dry skin types.

Irritation

low

Source

biotech

beautyskincaresurfactant
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Surfactant

Hydrolyzed Wheat Protein Surfactant

SODIUM/TEA-UNDECYLENOYL HYDROLYZED WHEAT PROTEIN

4.0

A mild, protein-based cleanser that helps clean skin and hair while leaving them feeling soft and conditioned.

Irritation

low

Source

semi-synthetic

beautyskincarehaircaresurfactant
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Surfactant

Hydroxycetyl Phosphate

Hydroxycetyl Phosphate

4.0

Hydroxycetyl Phosphate is a gentle synthetic emulsifier that helps create stable, smooth formulas without significant irritation or clogging concerns.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Hydroxystearyl Methylglucamine

Hydroxystearyl Methylglucamine

4.0

A mild, sugar-derived emulsifier that helps mix oil and water in cleansers and creams without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Emulsifier

Isoceteth-12

ISOCETETH-12

3.5

Isoceteth-12 is a synthetic emulsifier that helps mix oil and water in cleansers, but it may be slightly drying or irritating for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Emulsifier

Isoceteth-20

ISOCETETH-20

4.0

Isoceteth-20 is a gentle synthetic emulsifier that helps mix water and oil in your skincare, making textures smooth and stable without common irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Isoceteth-25

ISOCETETH-25

4.0

Isoceteth-25 is a gentle synthetic emulsifier that helps mix oil and water, making it a common but low-risk ingredient in cleansers and creams.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Isoceteth-30

ISOCETETH-30

3.8

Isoceteth-30 is a mild synthetic emulsifier that helps mix water and oil in cleansers, with low irritation potential for most skin types.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Isoceteth-5

ISOCETETH-5

3.5

Isoceteth-5 is a gentle synthetic emulsifier that helps mix oil and water in cleansers and lotions, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Isodeceth-4

ISODECETH-4

3.8

Isodeceth-4 is a gentle synthetic emulsifier that helps mix oil and water in cleansers and lotions, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Isodeceth-5

ISODECETH-5

3.5

Isodeceth-5 is a workhorse emulsifier that helps products feel smooth, but it can be drying or irritating for sensitive skin if used in high amounts.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Isodeceth-6

ISODECETH-6

3.8

Isodeceth-6 is a mild synthetic emulsifier that helps cleansers rinse away dirt and oil, but it may cause irritation for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Isolaureth-10

ISOLAURETH-10

3.5

A mild synthetic surfactant that helps cleansers foam and rinse clean, but may cause dryness or irritation for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Isolaureth-3

ISOLAURETH-3

3.5

A synthetic emulsifier that helps products rinse cleanly but may be drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Isolaureth-4 Phosphate

ISOLAURETH-4 PHOSPHATE

3.8

Isolaureth-4 Phosphate is a mild cleansing agent that helps remove dirt and oil, but may cause slight irritation for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Isomyreth-3

ISOMYRETH-3

3.5

Isomyreth-3 is a synthetic emulsifier that helps mix oil and water, but it may be mildly irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Isomyreth-9

ISOMYRETH-9

3.5

Isomyreth-9 is a synthetic emulsifier that helps cleansers foam and rinse cleanly, but it may be slightly drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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