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 35 of 95
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

Texture Enhancer

Nylon-11

NYLON-11

4.0

Nylon-11 is a safe, non-irritating powder that gives makeup a silky feel and helps control shine without clogging pores.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Texture Enhancer

Nylon-12

Nylon-12

4.0

Nylon-12 is a safe, non-irritating synthetic powder that gives makeup a silky feel and blurs imperfections without clogging pores.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Texture Enhancer

Nylon-611

Nylon-611

3.5

Nylon-611 is a safe, non-irritating synthetic powder that gives makeup and skincare a silky, smooth finish while absorbing excess oil.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Opacifying Agent

Opal Powder

OPAL POWDER

3.5

Opal powder adds a soft, natural shimmer to makeup but offers no proven skincare benefits beyond aesthetics.

Irritation

low

Source

natural

beautyskincarecosmetic
Read ingredient review

Thickener

Oxidized Microcrystalline Wax

TDI OXIDIZED MICROCRYSTALLINE WAX

3.5

A modified wax that helps give lipsticks and creams their smooth, solid texture, but may clog pores for some.

Irritation

low

Source

semi-synthetic

beautyskincarecosmetic
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Thickener

Ozokerite

Ozokerite

4.0

Ozokerite is a reliable, low-irritation wax that helps keep your lipsticks and balms solid and smooth, but it's a petroleum-derived ingredient with no active skin benefits.

Irritation

low

Source

natural

beautyskincarecosmetic
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Opacifying Agent

Perfluoroalkylsilyl Mica

PERFLUOROALKYLSILYL MICA

3.5

A coated mica that gives a silky feel and water resistance to powders, but its perfluoroalkyl coating raises environmental and health concerns.

Irritation

low

Source

semi-synthetic

beautyskincarecosmetic
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Film Former

Polyester-32

Polyester-32

3.5

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

Irritation

low

Source

synthetic

beautyskincarecosmetic
Read ingredient review

Thickener

Polyethylene

POLYETHYLENE

3.5

Polyethylene is a versatile synthetic polymer that helps products feel smooth and spread easily, but its use as microbeads has raised environmental concerns.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Texture Enhancer

Polymethylsilsesquioxane

Polymethylsilsesquioxane

4.0

A safe, non-irritating silicone powder that gives skin a smooth, matte finish and helps control shine.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Film Former

Polymethylstyrene Isopropanol Ketone

POLY METHYL STYRENE ISOPROPANOL KETONE

3.5

A synthetic film former that helps makeup last longer and resist water, but it's not a skincare active and may feel heavy on some skin types.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Film Former

Polyurea Crosspolymer-3

POLYUREA CROSSPOLYMER-3

3.8

A synthetic film-former that helps makeup and sunscreen last longer, but offers no active skincare benefit.

Irritation

low

Source

synthetic

beautyskincarecosmetic
Read ingredient review

Oral care agent

Potassium Fluorosilicate

Potassium Fluorosilicate

2.0

Potassium fluorosilicate is a fluoride salt used in oral care for cavity prevention, but it is toxic if ingested in large amounts and requires careful formulation.

Irritation

moderate

Source

synthetic

beautyoral carecosmetic
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Viscosity Controlling

Quaternium-18 Bentonite

QUATERNIUM-18 BENTONITE

3.8

A safe, modified clay that improves product texture and stability without major skin concerns.

Irritation

low

Source

semi-synthetic

beautyskincarecosmetic
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Absorbent

Red Poppy Flower Powder

PAPAVER RHOEAS FLOWER POWDER

3.5

Red Poppy Flower Powder adds gentle texture and a natural tint to powders and soaps, but its skincare benefits beyond physical exfoliation are not well-studied.

Irritation

low

Source

natural

beautyskincarecosmetic
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Absorbent

Serica Powder

Serica Powder

4.0

Serica Powder is a natural silk-derived ingredient that gives makeup a silky feel and helps absorb excess oil without clogging pores.

Irritation

low

Source

natural

beautyskincarecosmetic
Read ingredient review

Opacifying Agent

Silver Borosilicate

Silver Borosilicate

3.5

Silver borosilicate is a synthetic glassy powder that adds shimmer and a smooth feel to cosmetics, but its antimicrobial claims are not well-supported in leave-on skincare.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Binder

Starch Tallowate

Starch Tallowate

3.5

Starch Tallowate is a safe, low-irritation binder that helps cosmetics feel smooth and stay together, but it offers no active skincare benefits.

Irritation

low

Source

semi-synthetic

beautyskincarecosmetic
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Film Former

Styrene Acrylate Copolymer

STYRENE/ACRYLATES/ETHYLHEXYL ACRYLATE/LAURYL ACRYLATE COPOLYMER

3.8

A synthetic polymer that helps makeup last longer and feel smoother, but offers no skincare benefit.

Irritation

low

Source

synthetic

beautyskincarecosmetic
Read ingredient review

Film Former

Synthetic Carnauba Wax

Synthetic Carnauba

4.0

A vegan-friendly, lab-made wax that gives lipsticks and balms a smooth, glossy finish without the environmental concerns of harvesting natural carnauba.

Irritation

low

Source

synthetic

beautyskincarecosmetic
Read ingredient review

Opacifying Agent

Synthetic Moonstone Powder

Synthetic Moonstone Powder

3.8

A shimmering mineral powder that adds a subtle glow and gentle texture, but offers no skincare benefits beyond aesthetics.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Film Former

Titanium Crosspolymer

ISOPROPYL TITANIUM TRIISOSTEARATE/TRIETHOXYCAPRYLYLSILANE CROSSPOLYMER

3.8

A synthetic crosspolymer that helps makeup last longer and feel smoother, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Film Former

Titanium Crosspolymer Blend

ISOPROPYL TITANIUM TRIISOSTEARATE/PERFLUOROOCTYL TRIETHOXYSILANE CROSSPOLYMER

3.5

A synthetic film former that helps makeup and sunscreen stay put longer, but it's not a skincare active.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Binder

Titanium Isostearates

Titanium Isostearates

3.5

Titanium Isostearates is a safe, synthetic binder that helps pressed powders and color cosmetics hold together without causing irritation.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Film Former

Titanium/Silicone Crosspolymer Blend

ISOPROPYL TITANIUM TRIISOSTEARATE/TRIETHOXYSILYLETHYL POLYDIMETHYLSILOXYETHYL DIMETHICONE CROSSPOLYMER

3.5

A specialized silicone-based ingredient that helps makeup and sunscreen stay put and feel silky, but it's not a skincare active.

Irritation

low

Source

semi-synthetic

beautyskincarecosmetic
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Texture enhancer

Vinyldimethicone Crosspolymer

Vinyldimethicone Crosspolymer

4.5

A safe, non-irritating silicone powder that gives a silky finish and helps blur imperfections without clogging pores.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Binder

Zinc Myristate

Zinc Myristate

4.0

Zinc Myristate is a safe, synthetic powder ingredient that improves the feel and application of makeup, but it offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarecosmetic
Read ingredient review

Film Former

Zinc Rosinate

ZINC ROSINATE

3.5

Zinc Rosinate is a safe, non-irritating film former that helps makeup and hair products stay put without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincarecosmetic
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