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

Ceteth-16

CETETH-16

3.8

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Emulsifier

Ceteth-17

CETETH-17

3.5

Ceteth-17 is a gentle synthetic emulsifier that helps keep your skincare products stable and creamy, but it's not a star active ingredient.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Surfactant

Ceteth-18

CETETH-18

3.8

Ceteth-18 is a gentle cleansing and emulsifying ingredient that helps blend oil and water in skincare formulas, with a low risk of irritation.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Ceteth-2

CETETH-2

3.8

Ceteth-2 is a gentle emulsifier that helps mix water and oil in your skincare products, but it's not a star active ingredient.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

Ceteth-20 Phosphate

CETETH-20 PHOSPHATE

4.0

A gentle synthetic emulsifier that helps mix oil and water, commonly used in cleansers and lotions.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Emulsifier

Ceteth-24

CETETH-24

4.0

A gentle, synthetic emulsifier that helps water and oil mix in your skincare, with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

Ceteth-25

CETETH-25

4.0

Ceteth-25 is a gentle, water-loving emulsifier that helps blend oil and water in skincare formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Ceteth-3

CETETH-3

3.5

Ceteth-3 is a gentle emulsifier that helps mix water and oil in products, but it may not suit those seeking completely natural formulations.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Ceteth-3 Stearate

CETETH-3 STEARATE

4.0

A reliable emulsifier that helps create stable, creamy textures with a low risk of irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Ceteth-4

CETETH-4

4.0

Ceteth-4 is a gentle emulsifier that helps mix oil and water in cleansers and lotions, with a low risk of irritation for most skin types.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Ceteth-4 Stearate

CETETH-4 STEARATE

4.0

A reliable emulsifier that keeps creams smooth and stable, with a low risk of irritation or clogged pores.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Ceteth-45

CETETH-45

4.0

Ceteth-45 is a mild synthetic emulsifier that helps blend oil and water in products, making it a reliable choice for stable, creamy formulations.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

Ceteth-5 Stearate

CETETH-5 STEARATE

4.0

A gentle emulsifier that helps create stable, creamy textures without common irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Surfactant

Ceteth-6

CETETH-6

4.0

Ceteth-6 is a gentle emulsifier that helps mix oil and water in your skincare, making it a common but low-risk ingredient in cleansers and creams.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Ceteth-7

CETETH-7

4.0

A gentle emulsifier that helps water and oil mix, making creams and cleansers smooth and stable.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Ceteth-7 Stearate

CETETH-7 STEARATE

4.0

Ceteth-7 Stearate is a reliable synthetic emulsifier that keeps creams and lotions stable and smooth, with a low risk of irritation for most skin types.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

Ceteth-8 Phosphate

CETETH-8 PHOSPHATE

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Ceteth-9 Stearate

CETETH-9 STEARATE

3.8

Ceteth-9 Stearate is a reliable synthetic emulsifier that helps create stable, creamy textures, but it may not be ideal for those avoiding ethoxylated ingredients.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Antistatic Agent

Cetethyldimonium Bromide

Cetethyldimonium Bromide

3.5

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

Irritation

moderate

Source

synthetic

beautyhaircareskincare
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Emulsifier

Cetoleth-4

CETOLETH-4

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

Cetoleth-6

CETOLETH-6

4.0

Cetoleth-6 is a gentle emulsifier that helps cleansers foam and rinse cleanly without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

Cetonal

CETONAL

3.5

Cetonal is a synthetic emollient that helps soften and smooth the skin, but it's not a standout ingredient and is best used as part of a broader formulation.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Antistatic Agent

Cetrimonium Bromide

CETRIMONIUM BROMIDE

3.8

Cetrimonium bromide is an effective hair conditioner and mild preservative, but can be irritating to sensitive skin or eyes at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincarehaircaresurfactant
Read ingredient review

Antistatic Agent

Cetrimonium Chloride

CETRIMONIUM CHLORIDE

3.8

A common conditioning ingredient that softens hair and reduces static, but can be irritating or pore-clogging for some skin types.

Irritation

moderate

Source

synthetic

beautyskincarehaircare
Read ingredient review

Antistatic Agent

Cetrimonium Methosulfate

CETRIMONIUM METHOSULFATE

4.0

A gentle conditioning ingredient that reduces static and softens hair without heavy buildup.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Antistatic Agent

Cetrimonium Saccharinate

CETRIMONIUM SACCHARINATE

3.8

A gentle conditioning ingredient that reduces static and improves hair manageability, but may not suit very sensitive scalps.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Antistatic Agent

Cetrimonium Tosylate

CETRIMONIUM TOSYLATE

3.8

Cetrimonium tosylate is a synthetic conditioning agent that reduces static and softens hair, but may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarehaircareconditioning agent
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Antioxidant

Cetyl 2-Glyceryl Ascorbate

CETYL 2-GLYCERYL ASCORBATE

4.3

A gentle, oil-soluble vitamin C derivative that brightens and protects without the sting or instability of pure vitamin C.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Antioxidant

Cetyl 3-Glyceryl Ascorbate

CETYL 3-GLYCERYL ASCORBATE

4.3

A gentle, oil-friendly vitamin C derivative that brightens skin and fights free radicals without the sting of pure ascorbic acid.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Emollient

Cetyl Acetate

Cetyl Acetate

4.0

Cetyl acetate is a gentle emollient that softens skin and improves product texture without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Cetyl Alcohol

Cetyl Alcohol

4.5

Cetyl alcohol is a safe, non-drying fatty alcohol that helps thicken and stabilize products while leaving skin soft and smooth.

Irritation

low

Source

natural

beautyskincareemollientthickener
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Conditioning Agent

Cetyl Amodimethicone

Cetyl Amodimethicone

4.0

Cetyl Amodimethicone is a gentle silicone that adds slip and shine to hair and skin, with low irritation potential.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Emollient

Cetyl Arachidol

CETYLARACHIDOL

4.0

A gentle, synthetic emollient that helps skin feel soft and smooth without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Cetyl Babassuate

Cetyl Babassuate

4.5

A lightweight, plant-based emollient that hydrates and softens skin without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Cetyl Behenate

Cetyl Behenate

4.0

Cetyl Behenate is a gentle, non-greasy emollient that helps moisturizers feel smooth and spread easily without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Surfactant

Cetyl Betainate Chloride

Cetyl Betainate Chloride

4.0

A gentle, conditioning surfactant that cleanses without stripping the skin, making it ideal for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
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Surfactant

Cetyl Betaine

Cetyl Betaine

4.3

Cetyl Betaine is a gentle, coconut-derived surfactant that cleanses without stripping the skin barrier, making it ideal for sensitive skin and daily use.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
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Emollient

Cetyl Caprate

Cetyl Caprate

4.2

A gentle, non-greasy emollient that helps moisturizers feel silky without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Cetyl Caprylate

Cetyl Caprylate

4.0

Cetyl Caprylate is a gentle, non-greasy emollient that improves product feel and skin softness, with a low risk of irritation or clogged pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emollient

Cetyl Dimethicone

Cetyl Dimethicone

4.0

A gentle silicone that softens skin and improves product feel, widely considered safe and non-irritating.

Irritation

low

Source

synthetic

beautyskincareemollient
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Film Former

Cetyl Dimethicone Crosspolymer Blend

CETYL DIMETHICONE/BIS-VINYLDIMETHICONE CROSSPOLYMER

4.0

A safe silicone polymer that gives products a silky feel and helps ingredients spread evenly without clogging pores.

Irritation

low

Source

synthetic

beautyskincaretexturizer
Read ingredient review

Emulsifier

Cetyl Dimethicone PEG-7 Acetate

Cetyl Dimethicone PEG-7 Acetate

4.0

A gentle silicone emulsifier that helps create smooth, creamy textures and leaves skin and hair feeling soft without heavy residue.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Emollient

Cetyl Dimethylbutyl Ether

Cetyl Dimethylbutyl Ether

4.0

A gentle synthetic emollient that improves skin feel and helps lock in moisture without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Cetyl Dimethyloctanoate

Cetyl Dimethyloctanoate

4.0

A lightweight synthetic emollient that softens skin without clogging pores, ideal for oily and combination skin types.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Cetyl Dodecenylsuccinate

Cetyl Dodecenylsuccinate

3.8

A gentle synthetic emollient that helps soften and smooth skin with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Cetyl Ethylhexanoate

Cetyl Ethylhexanoate

4.0

A lightweight, non-greasy emollient that softens skin and improves product texture without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Cetyl Glyceryl Ether

Cetyl Glyceryl Ether

4.0

A gentle emollient that helps soften skin and stabilize formulas, with a low risk of irritation or clogged pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emollient

Cetyl Glycol

Cetyl Glycol

4.0

Cetyl Glycol is a gentle, non-irritating ingredient that helps moisturize skin and improve the texture and stability of creams and lotions.

Irritation

low

Source

synthetic

beautyskincareemollient
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