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

Film Former

Acrylates/HEMA Copolymer

ACRYLATES/HEMA COPOLYMER

3.5

A safe, synthetic film-former that helps makeup and sunscreen stay put without clogging pores.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Acrylates/Silicone Copolymer

ACRYLATES/STEARYL ACRYLATE/DIMETHICONE METHACRYLATE COPOLYMER

3.8

A synthetic film-former that helps products stay put and resist water, but may feel tight or heavy on some skin types.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Acrylates/Soybean Oil Copolymer

ACRYLATES/HYDROXYPROPYL EPOXIDIZED SOYBEAN OIL COPOLYMER

3.8

A safe film-forming polymer that helps makeup and sunscreen stay put without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincarefilm-former
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Film Former

Acrylates/VA Copolymer

ACRYLATES/VA COPOLYMER

3.5

A safe, common film-former that helps products stay put and feel smooth, but offers no active skincare benefit.

Irritation

low

Source

synthetic

beautyskincarehaircare
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Film Former

Acrylates/VA Crosspolymer

ACRYLATES/VA CROSSPOLYMER

4.0

A safe, synthetic thickener and film-former that helps products spread smoothly and stay put, with very low irritation risk.

Irritation

low

Source

synthetic

beautyskincaretexturizer
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Film Former

Acrylates/VP Copolymer

ACRYLATES/VP COPOLYMER

3.8

A safe, synthetic film-former that helps products stay put and feel smooth, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarehaircare
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Viscosity Controlling

Acrylic Acid

Acrylic Acid

3.0

Acrylic acid is a synthetic building block for common thickeners and stabilizers, but it is rarely used directly in skincare due to potential irritation.

Irritation

moderate

Source

synthetic

beautyskincareviscosity controlling
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Film Former

Acrylic Acid Copolymer

ACRYLIC ACID/ETHYLTRIMONIUM CHLORIDE METHACRYLATE COPOLYMER

3.8

A synthetic polymer that helps products spread smoothly, hold styles, and leave a soft, non-sticky finish.

Irritation

low

Source

synthetic

beautyskincarehaircare
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Viscosity Controlling

Acrylic Acid Crosspolymer

ACRYLIC ACID/ISOPROPYLACRYLAMIDE/MIBK ACRYLAMIDE CROSSPOLYMER

3.8

A synthetic thickener that improves product texture and stability with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaretexturizer
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Film Former

Acrylic Acid/VP Crosspolymer

ACRYLIC ACID/VP CROSSPOLYMER

3.8

A synthetic thickener and film former that helps create a smooth, lightweight feel in gels and serums, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincarethickener
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Film Former

Acrylic Copolymer Blend

ACRYLIC ACID/ISOBORNYL METHACRYLATE/ISOBUTYL METHACRYLATE COPOLYMER

3.5

A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefit.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film-Former

Acryloyl Morpholine

Acryloyl Morpholine

3.8

A synthetic film-former that helps products stay put on skin and resist water, but it's not a moisturizer or active ingredient.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Acryloyloxy Propyltrimethoxysilane

ACRYLOYLOXY PROPYLTRIMETHOXYSILANE

3.5

A synthetic film-former that helps products adhere to skin or nails, but may cause irritation in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarefilm-former
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