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

Polyquaternium-74

Polyquaternium-74

4.0

A gentle conditioning polymer that smooths hair and skin without heavy buildup, ideal for sensitive scalps and fine hair.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polyquaternium-76

Polyquaternium-76

4.0

Polyquaternium-76 is a gentle, film-forming polymer that smooths hair and reduces static without heavy buildup.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polyquaternium-8

Polyquaternium-8

3.8

Polyquaternium-8 is a gentle conditioning polymer that helps reduce frizz and static in hair without heavy buildup.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polyquaternium-81

Polyquaternium-81

3.8

Polyquaternium-81 is a gentle conditioning polymer that helps reduce frizz and static without heavy buildup, making it a good choice for fine or easily weighed-down hair.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polyquaternium-83

Polyquaternium-83

4.0

A gentle synthetic polymer that coats hair to reduce frizz and static, but may not suit very fine or low-porosity hair if overused.

Irritation

low

Source

synthetic

beautyskincarehaircarefilm former
Read ingredient review

Antistatic Agent

Polyquaternium-84

Polyquaternium-84

4.0

Polyquaternium-84 is a gentle, synthetic conditioning polymer that smooths hair and reduces static without heavy buildup.

Irritation

low

Source

synthetic

beautyskincarehair carefilm former
Read ingredient review

Film Former

Polyquaternium-85

POLYQUATERNIUM-85

4.0

A gentle conditioning polymer that smooths hair and reduces static without heavy buildup.

Irritation

low

Source

synthetic

beautyskincarehaircarefilm former
Read ingredient review

Film Former

Polyquaternium-86

Polyquaternium-86

4.0

Polyquaternium-86 is a gentle conditioning polymer that helps detangle hair and reduce frizz without heavy buildup.

Irritation

low

Source

synthetic

beautyskincarehair care
Read ingredient review

Film Former

Polyquaternium-88

Polyquaternium-88

4.0

Polyquaternium-88 is a gentle synthetic polymer that smooths hair and skin by forming a thin, flexible film, but it may cause buildup with frequent use.

Irritation

low

Source

synthetic

beautyskincarehaircarefilm former
Read ingredient review

Film Former

Polyquaternium-9

Polyquaternium-9

3.8

Polyquaternium-9 is a gentle conditioning polymer that helps reduce frizz and static without heavy buildup.

Irritation

low

Source

synthetic

beautyskincarehaircarefilm-former
Read ingredient review

Film Former

Polyquaternium-90

Polyquaternium-90

4.0

A gentle, effective conditioning polymer that smooths hair without heavy buildup.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polyquaternium-91

Polyquaternium-91

4.0

A gentle, film-forming polymer that smooths hair and reduces static without heavy buildup.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polyquaternium-93

Polyquaternium-93

4.0

A gentle conditioning polymer that smooths hair without heavy buildup, suitable for most hair types.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polyquaternium-96

Polyquaternium-96

4.0

Polyquaternium-96 is a gentle synthetic polymer that smooths hair and skin without heavy buildup, making it a good choice for sensitive scalps.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polyquaternium-97

Polyquaternium-97

4.0

Polyquaternium-97 is a gentle, film-forming polymer that smooths hair and skin without heavy buildup, making it a reliable choice for daily conditioning.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polyquaternium-98

Polyquaternium-98

4.0

Polyquaternium-98 is a gentle, film-forming polymer that smooths hair and skin without heavy buildup, making it a good choice for sensitive scalps and fine hair.

Irritation

low

Source

synthetic

beautyskincarehaircareconditioning agent
Read ingredient review

Film Former

Polyquaternium-99

Polyquaternium-99

4.0

Polyquaternium-99 is a gentle conditioning polymer that helps reduce frizz and static while improving the feel of hair and skin.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polysilicone-1

Polysilicone-1

4.0

Polysilicone-1 is a gentle silicone that helps products spread smoothly and stay put without clogging pores.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-1 Crosspolymer

Polysilicone-1 Crosspolymer

4.0

A gentle silicone polymer that creates a smooth, velvety feel on skin and helps products spread evenly without clogging pores.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-10

POLYSILICONE-10

4.0

Polysilicone-10 is a gentle silicone that smooths skin and hair without clogging pores, making it a safe choice for most skin types.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polysilicone-11

Polysilicone-11

4.0

Polysilicone-11 is a gentle silicone that helps products glide on smoothly and stay put without clogging pores.

Irritation

low

Source

synthetic

beautyskincarefilm former
Read ingredient review

Film Former

Polysilicone-12

Polysilicone-12

3.8

Polysilicone-12 is a gentle silicone that gives skin a silky, smooth finish and helps makeup last longer without clogging pores.

Irritation

low

Source

synthetic

beautyskincarefilm former
Read ingredient review

Film Former

Polysilicone-13

Polysilicone-13

3.8

Polysilicone-13 is a gentle silicone that helps products spread smoothly and resist water, but it offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-14

POLYSILICONE-14

4.0

Polysilicone-14 is a gentle film-forming silicone that helps products last longer and feel smooth, but it may not suit everyone who prefers silicone-free routines.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-15

Polysilicone-15

4.0

Polysilicone-15 is a safe, non-irritating silicone that helps sunscreen stay on your skin longer and feel lighter.

Irritation

low

Source

synthetic

beautyskincaresunscreen
Read ingredient review

Film Former

Polysilicone-16

Polysilicone-16

3.8

Polysilicone-16 is a gentle silicone that helps products glide on smoothly and leaves hair and skin feeling soft without heavy buildup.

Irritation

low

Source

synthetic

beautyskincarehaircarefilm-former
Read ingredient review

Film Former

Polysilicone-17

POLYSILICONE-17

3.8

Polysilicone-17 is a gentle silicone that leaves skin and hair feeling smooth without clogging pores, but it offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polysilicone-18

Polysilicone-18

4.0

Polysilicone-18 is a gentle silicone film-former that helps products stay put and resist water, but it may feel heavy on oily or acne-prone skin.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-18 Stearate

POLYSILICONE-18 STEARATE

4.0

A gentle silicone that helps products glide on smoothly and stay put without clogging pores or causing irritation.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-19

POLYSILICONE-19

3.8

Polysilicone-19 is a gentle film-forming silicone that helps products feel silky and spread smoothly, but it offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polysilicone-2

POLYSILICONE-2

3.8

Polysilicone-2 is a gentle silicone that smooths skin and hair without heavy buildup, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarehaircarefilm-former
Read ingredient review

Film Former

Polysilicone-20

POLYSILICONE-20

4.0

Polysilicone-20 is a gentle silicone that helps products spread smoothly and leaves skin feeling soft without clogging pores.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-21

POLYSILICONE-21

4.0

Polysilicone-21 is a gentle, non-comedogenic film former that helps products spread smoothly and resist water without feeling heavy.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-22

POLYSILICONE-22

4.0

Polysilicone-22 is a gentle film-forming silicone that helps products resist water and sweat while leaving a smooth, non-greasy feel.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-23

POLYSILICONE-23

4.0

Polysilicone-23 is a gentle silicone that creates a smooth, non-greasy film on skin and hair, but it may not suit those avoiding silicones entirely.

Irritation

low

Source

synthetic

beautyskincarehaircarefilm-former
Read ingredient review

Film Former

Polysilicone-24

Polysilicone-24

4.0

A gentle silicone film-former that helps hair hold its style and skin feel smooth without heavy buildup.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polysilicone-25

Polysilicone-25

3.8

Polysilicone-25 is a gentle silicone that helps products spread smoothly and leaves hair or skin feeling silky, but it may build up with repeated use.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polysilicone-26

POLYSILICONE-26

3.8

Polysilicone-26 is a gentle silicone that helps products spread smoothly and stay put, but it may feel heavy for oily skin types.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-27

POLYSILICONE-27

3.8

Polysilicone-27 is a gentle film-forming silicone that helps makeup and sunscreen stay put without clogging pores.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-28

POLYSILICONE-28

4.0

Polysilicone-28 is a gentle film-forming silicone that helps products glide on smoothly and stay put without clogging pores.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-29

POLYSILICONE-29

3.8

Polysilicone-29 is a gentle silicone that creates a smooth, non-greasy film on skin or hair, but it may not suit those who prefer silicone-free routines.

Irritation

low

Source

synthetic

beautyskincarefilm former
Read ingredient review

Film Former

Polysilicone-3

Polysilicone-3

4.0

Polysilicone-3 is a gentle silicone that leaves skin and hair feeling smooth without clogging pores, but it may not suit those avoiding silicones entirely.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polysilicone-30

Polysilicone-30

3.8

Polysilicone-30 is a gentle film-forming silicone that helps products feel smooth and stay put, but it may not suit those who prefer silicone-free routines.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-31

Polysilicone-31

4.0

Polysilicone-31 is a gentle silicone that creates a smooth, velvety finish on skin without clogging pores, making it a popular choice for primers and long-wear makeup.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-32

POLYSILICONE-32

3.5

Polysilicone-32 is a gentle silicone that helps products spread smoothly and leaves a soft, non-greasy finish, but it may not suit those who prefer silicone-free routines.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polysilicone-33

Polysilicone-33

4.0

Polysilicone-33 is a gentle silicone that creates a smooth, velvety finish on skin and helps products spread evenly without clogging pores.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-34

POLYSILICONE-34

3.8

Polysilicone-34 is a gentle silicone that helps products glide on smoothly and stay put, but it may not suit those who prefer silicone-free routines.

Irritation

low

Source

synthetic

beautyskincarefilm former
Read ingredient review

Film Former

Polysilicone-4

Polysilicone-4

4.0

Polysilicone-4 is a gentle silicone that helps products spread smoothly and feel silky, but it may not suit those who prefer silicone-free routines.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polysilicone-5

POLYSILICONE-5

3.8

Polysilicone-5 is a gentle film-forming silicone that helps products spread smoothly and resist water, but it may not suit those avoiding silicones.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polysilicone-6

POLYSILICONE-6

4.0

Polysilicone-6 is a gentle silicone that helps products glide on smoothly and leaves skin or hair feeling silky without clogging pores.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polysilicone-7

POLYSILICONE-7

4.0

Polysilicone-7 is a gentle film-forming silicone that helps products spread smoothly and resist water, but it may not suit those avoiding silicones entirely.

Irritation

low

Source

synthetic

beautyskincarehaircarefilm-former
Read ingredient review

Film Former

Polysilicone-8

POLYSILICONE-8

4.0

Polysilicone-8 is a gentle silicone that creates a smooth, breathable film on skin and hair, improving texture without clogging pores.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Film Former

Polysilicone-9

POLYSILICONE-9

4.0

Polysilicone-9 is a gentle silicone that smooths skin and hair without heavy buildup, making it a good option for lightweight formulas.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Emulsifier

Polysorbate

Polysorbate 20, Polysorbate 60, Polysorbate 80

4.0

Polysorbates are widely used, gentle emulsifiers that keep your skincare products stable and easy to rinse off.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 20

Polysorbate 20

4.2

Polysorbate 20 is a widely used, gentle emulsifier that helps mix water and oil, making it a staple in many cleansers and lotions.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 20 Dicinnamate

Polysorbate 20 Dicinnamate

3.8

A hybrid ingredient that helps blend water and oil while offering mild UV protection, but research is still limited.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 40

Polysorbate 40

4.0

Polysorbate 40 is a gentle emulsifier that keeps oil and water mixed in your products, but it may be too rich for very oily or acne-prone skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Polysorbate 60

Polysorbate 60

4.0

Polysorbate 60 is a gentle, widely used emulsifier that keeps oil and water mixed in creams and lotions without causing irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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