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 9 of 9
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

Plasticizer

Butylphthalimide

Butylphthalimide

3.0

Butylphthalimide is a synthetic plasticizer that helps nail products stay flexible and resist chipping, but it has limited safety data and is best used in well-ventilated spaces.

Irritation

low

Source

synthetic

beautynail careplasticizer
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Plasticizer

Diisodecyl Phthalate

Diisodecyl Phthalate

1.0

Diisodecyl phthalate is a plasticizer with limited cosmetic use; it is not a typical skincare ingredient and is best avoided due to potential health concerns.

Irritation

low

Source

synthetic

beautyskincareplasticizer
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Plasticizer

Diisoheptyl Phthalate

Diisoheptyl Phthalate

1.0

Diisoheptyl Phthalate is a synthetic plasticizer with no proven skincare benefit and potential health concerns; it is best avoided in leave-on products.

Irritation

moderate

Source

synthetic

beautyskincareplasticizer
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Plasticizer

Ditridecyl Phthalate

DITRIDECYL PHTHALATE

2.0

Ditridecyl phthalate is a plasticizer that helps products spread and flex, but its phthalate nature raises potential endocrine concerns, so many brands avoid it.

Irritation

low

Source

synthetic

beautyskincareplasticizer
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Plasticizer

Ethyl Tosylamide

Ethyl Tosylamide

3.5

Ethyl Tosylamide is a synthetic plasticizer that makes nail polish more flexible and durable, but it can be a skin sensitizer for some people.

Irritation

moderate

Source

synthetic

beautynail careplasticizer
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Plasticizer

Tosylamide

Tosylamide

3.0

Tosylamide helps nail products stay flexible and durable, but it may cause irritation in sensitive individuals and has raised some safety concerns.

Irritation

moderate

Source

synthetic

beautynail careplasticizer
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Plasticizer

Triphenyl Phosphate

Triphenyl Phosphate

2.5

Triphenyl phosphate is a synthetic plasticizer used in nail products, but it has raised some health concerns due to potential endocrine disruption and skin irritation.

Irritation

moderate

Source

synthetic

beautynail careplasticizer
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