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 842
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

Alkyl Galactomannan

C1-5 ALKYL GALACTOMANNAN

4.0

A gentle, plant-derived film-former that helps products feel smooth and stay put without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincarefilm-former
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Film Former

Allyl Stearate/VA Copolymer

Allyl Stearate/Vinyl Acetate Copolymer

3.5

A synthetic film-former that helps makeup and sunscreen stay put longer, especially in water or sweat.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Aminopropyl Triethoxysilane

Aminopropyl Triethoxysilane

3.5

A synthetic silicone compound that helps makeup and skincare last longer by forming a flexible, water-resistant film on skin or hair.

Irritation

low

Source

synthetic

beautyskincarehaircarefilm-former
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Film Former

Ammonium Caseinate

Ammonium Caseinate

3.5

A milk protein that forms a light film on skin or hair, offering temporary smoothing and conditioning, but may not suit those with dairy allergies.

Irritation

low

Source

natural

beautyskincarefilm-former
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Film Former

Ammonium Hydrolyzed Collagen

Ammonium Hydrolyzed Collagen

3.8

A gentle, salt-modified collagen that coats hair and skin to reduce frizz and add temporary softness, but its effects are not permanent.

Irritation

low

Source

semi-synthetic

beautyskincarehaircarefilm-former
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Film-Former

AMPD-Rosin Hydrolyzed Collagen

AMPD-Rosin Hydrolyzed Collagen

3.5

A semi-synthetic collagen derivative that forms a light film on skin to help retain moisture, but research on its benefits is still limited.

Irritation

low

Source

semi-synthetic

beautyskincarefilm-former
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Film-Former

Amylopectin

AMYLOPECTIN

3.8

A gentle, plant-derived film-former that helps products feel smooth and can provide a light, non-sticky barrier on skin.

Irritation

low

Source

natural

beautyskincarefilm-former
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Film-Forming Agent

Amylose

AMYLOSE

3.8

Amylose is a gentle, natural starch derivative that helps create a smooth, lightweight film on the skin, improving texture and moisture retention without clogging pores.

Irritation

low

Source

natural

beautyskincarefilm-former
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Humectant

Apple Pectin Extract

Pyrus Malus Pectin Extract

4.0

Apple pectin extract is a gentle, plant-derived humectant that helps hydrate and soothe skin while forming a light protective film.

Irritation

low

Source

natural

beautyskincarehumectantfilm-former
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Humectant

Arabinoxylan

ARABINOXYLAN

4.0

A gentle, plant-based humectant that hydrates and soothes, ideal for sensitive or dry skin.

Irritation

low

Source

natural

beautyskincarehumectantfilm-former
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Film Former

Behenyl Methacrylate Copolymer

BEHENYL METHACRYLATE/PERFLUOROOCTYLETHYL METHACRYLATE COPOLYMER

3.5

A synthetic film-former that helps products stay put longer, especially in water-resistant sunscreens and long-wear makeup.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Beta-Sitosteryl Copolymer

BETA-SITOSTERYL (OCTADECENE/MA) COPOLYMER

3.8

A gentle film-forming ingredient that helps products spread smoothly and stay put, with low irritation risk.

Irritation

low

Source

semi-synthetic

beautyskincarefilm-former
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Film Former

Bis-Adamantanyl PEG-2300 Dicarboxamide

BIS-ADAMANTANYL PEG-2300 DICARBOXAMIDE

3.8

A synthetic film-forming polymer that helps lock in moisture and improve skin feel, but research is limited compared to more common humectants.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Bis-Adamantanyl PEG-800 Dicarboxamide

BIS-ADAMANTANYL PEG-800 DICARBOXAMIDE

4.0

A high-tech synthetic polymer that delivers extended hydration and a protective film, but is best suited for those who enjoy advanced, silicone-like textures.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Bis-Dimethicone

Bis-Dimethicone

4.0

A gentle silicone that helps products glide on smoothly and lock in moisture without clogging pores.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Bis-HEA Polycaprolactone Diol/HDI Copolymer

BIS-HEA POLYCAPROLACTONE DIOL/HDI COPOLYMER

4.0

A gentle synthetic polymer that forms a flexible, breathable film to improve product wear, water resistance, and skin feel without clogging pores.

Irritation

low

Source

synthetic

beautyskincarehaircarefilm-former
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Film Former

Bis-HEMA Copolymer

BIS-HEMA POLYNEOPENTYL GLYCOL ADIPATE/IPDI COPOLYMER

4.0

A synthetic film-former that helps makeup and sunscreen stay put longer without feeling heavy.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Bis-HEMA IPDI

BIS-HEMA IPDI

3.5

A synthetic film-former that helps makeup last longer and resist water, but may feel stiff or heavy on sensitive skin.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Bis-HEMA Polycaprolactone Copolymer

BIS-HEMA POLY(CAPROLACTONE NEOPENTYL GLYCOL)/IPDI COPOLYMER

3.8

A synthetic film-former that helps makeup and skincare stay put, resist water, and feel flexible on skin.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Bis-Methoxy PEG-10 Poly(TMXDI)

BIS-METHOXY PEG-10 POLY(TETRAMETHYLXYLENE DIISOCYANATE)

3.8

A synthetic film-former that helps makeup last longer and resist water, but may feel tight or dry on sensitive skin.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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