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

Emulsifier

Polyglyceryl-6 Dicaprate

Polyglyceryl-6 Dicaprate

4.5

A mild, plant-derived emulsifier that helps create stable, lightweight textures without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Diisostearate

Polyglyceryl-6 Diisostearate

4.5

A mild, effective emulsifier that creates silky textures and is well-tolerated by most skin types, including sensitive skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Dioleate

Polyglyceryl-6 Dioleate

4.5

A mild, plant-derived emulsifier that helps blend oil and water in skincare products without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Dipalmitate

POLYGLYCERYL-6 DIPALMITATE

4.5

A mild, plant-derived emulsifier that helps blend oil and water in creams and lotions without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Distearate

POLYGLYCERYL-6 DISTEARATE

4.5

A mild, plant-derived emulsifier that creates stable, lightweight textures without clogging pores or irritating skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Heptacaprylate

POLYGLYCERYL-6 HEPTACAPRYLATE

4.5

A mild, plant-derived emulsifier that helps create stable, lightweight formulas without clogging pores or irritating skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Hexaoleate

Polyglyceryl-6 Hexaoleate

4.3

A mild, plant-derived emulsifier that helps create stable, lightweight creams and lotions without clogging pores.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Isostearate

Polyglyceryl-6 Isostearate

4.3

A gentle, PEG-free emulsifier that creates stable, lightweight textures without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emollient

Polyglyceryl-6 Kukui Nut Seedate

Polyglyceryl-6 Citrullus Lanatus (Kukui Nut) Seedate

4.3

A lightweight, non-greasy emollient derived from kukui nut oil that hydrates and softens skin without clogging pores.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Laurate

Polyglyceryl-6 Laurate

4.5

A mild, eco-friendly emulsifier that creates stable, lightweight formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Manketti Kernelate

Polyglyceryl-6 Schinziophyton Rautanenii Kernelate

4.3

A gentle, plant-based emulsifier that helps blend oil and water in your skincare products while leaving skin feeling soft.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Myristate

Polyglyceryl-6 Myristate

4.3

A gentle, non-irritating emulsifier that creates stable, lightweight formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Myristyl Ether

POLYGLYCERYL-6 MYRISTYL ETHER

4.2

A mild, non-irritating emulsifier that helps create stable, lightweight creams and lotions without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Octacaprylate

POLYGLYCERYL-6 OCTACAPRYLATE

4.3

A gentle, plant-derived emulsifier that helps create stable, lightweight textures with low irritation potential.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Octastearate

POLYGLYCERYL-6 OCTASTEARATE

4.2

A mild, plant-derived emulsifier that helps create smooth, stable creams without common irritation.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Oleate

Polyglyceryl-6 Oleate

4.5

A mild, plant-derived emulsifier that helps create stable, lightweight formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Palmitate

Polyglyceryl-6 Palmitate

4.3

A mild, plant-based emulsifier that creates stable, lightweight textures without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Pentacaprylate

Polyglyceryl-6 Pentacaprylate

4.5

A mild, plant-based emulsifier that creates stable, lightweight textures without clogging pores or irritating skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Pentaoleate

Polyglyceryl-6 Pentaoleate

4.5

A mild, plant-derived emulsifier that creates stable, lightweight textures without clogging pores or irritating skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Sesquicaprylate

POLYGLYCERYL-6 SESQUICAPRYLATE

4.5

A mild, non-irritating emulsifier that helps create stable, lightweight formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Shea Butterate

POLYGLYCERYL-6 SCLEROCARYA BIRREA SEEDATE

4.5

A mild, eco-friendly emulsifier that helps blend water and oil in creams and lotions while leaving skin feeling soft.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Stearate

Polyglyceryl-6 Stearate

4.5

A mild, plant-derived emulsifier that creates stable, lightweight textures without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Tetraoleate

Polyglyceryl-6 Tetraoleate

4.5

A mild, plant-derived emulsifier that helps create stable, non-greasy formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emollient

Polyglyceryl-6 Tricaprylate

Polyglyceryl-6 Tricaprylate

4.3

A gentle, non-greasy emollient that hydrates and softens skin without clogging pores, ideal for sensitive and oily skin types.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Trilaurate

Polyglyceryl-6 Trilaurate

4.5

A mild, effective emulsifier that creates stable, elegant textures without common irritation.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Tristearate

Polyglyceryl-6 Tristearate

4.5

A mild, plant-derived emulsifier that helps create stable, creamy textures without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Undecylenate

Polyglyceryl-6 Undecylenate

4.5

A mild, non-stripping emulsifier that helps create stable, rinse-off and leave-on products without drying the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-6 Ximenia Seedate

Polyglyceryl-6 Ximenia Americana Seedate

4.3

A mild, eco-friendly emulsifier that stabilizes formulas while leaving skin feeling soft—great for sensitive and natural-leaning routines.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-8 Ester Blend

POLYGLYCERYL-8 DECAERUCATE/DECAISOSTEARATE/DECARICINOLEATE

4.0

A gentle, plant-derived emulsifier that helps create smooth, stable creams and lotions with a silky feel.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-8 Oleate

Polyglyceryl-8 Oleate

4.3

A mild, plant-derived emulsifier that stabilizes formulas without stripping the skin or causing irritation.

Irritation

low

Source

semi-synthetic

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Emulsifier

Polyglyceryl-8 Stearate

Polyglyceryl-8 Stearate

4.5

A mild, plant-derived emulsifier that creates stable, creamy textures without stripping the skin.

Irritation

low

Source

semi-synthetic

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Antioxidant

Polygonum Falcatum Root Extract

Polygonum Falcatum Rhizome/Root Extract

3.8

A gentle plant-root extract that may help calm skin and fight free radicals, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Polygonum Filiforme Extract

POLYGONUM FILIFORME FLOWER/LEAF/STEM EXTRACT

3.8

A gentle plant extract with antioxidant potential, but research is limited compared to more studied botanicals.

Irritation

low

Source

natural

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Antioxidant

Polygonum Tinctorium Flower Extract

POLYGONUM TINCTORIUM FLOWER EXTRACT

4.0

A gentle, plant-derived antioxidant that may help calm skin and defend against environmental stress, though research is still emerging.

Irritation

low

Source

natural

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Film-Forming Agent

Polyhydroxybutyrate

POLYHYDROXYBUTYRATE

4.0

A gentle, biodegradable film-former that helps lock in moisture and may support the skin barrier.

Irritation

low

Source

biotech

beautyskincarefilm-former
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Film Former

Polyhydroxyethylmethacrylate

POLYHYDROXYETHYLMETHACRYLATE

3.8

A synthetic polymer that creates a smooth, silky feel on skin and helps other ingredients form a light, flexible film.

Irritation

low

Source

synthetic

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Dispersant

Polyhydroxystearic Acid

Polyhydroxystearic Acid

4.2

A gentle synthetic polymer that helps sunscreen minerals and pigments spread evenly and stay stable, with very low irritation potential.

Irritation

low

Source

synthetic

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Film Former

Polyisobutyl Methacrylate

POLYISOBUTYL METHACRYLATE

3.5

A synthetic film-former that helps makeup and sunscreen stay put, but offers no skincare benefit.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Polyisoprene

POLYISOPRENE

3.5

Polyisoprene is a synthetic rubber-like polymer that helps cosmetics stay put, but it offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Emulsifier

Polylactate/Ricinoleate

Polylactate/Ricinoleate

4.0

A gentle, plant-derived emulsifier that helps blend oil and water in formulas while also softening the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Exfoliant

Polylactic Acid

POLYLACTIC ACID

4.0

Polylactic acid is a gentle, biodegradable exfoliant derived from corn or sugarcane that helps smooth skin texture without harsh irritation.

Irritation

low

Source

natural

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Preservative

Polylysine

POLYLYSINE

4.0

A gentle, naturally-derived preservative booster that helps keep your skincare products fresh without harsh chemicals.

Irritation

low

Source

biotech

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Preservative

Polylysine HBr

POLYLYSINE HBR

4.0

A gentle, fermentation-derived preservative booster that helps keep products fresh without harsh chemicals.

Irritation

low

Source

biotech

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