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 20,769
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

Acrylates/VA Copolymer

ACRYLATES/VA COPOLYMER

3.5

A safe, common film-former that helps products stay put and feel smooth, but offers no active skincare benefit.

Irritation

low

Source

synthetic

beautyskincarehaircare
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Film Former

Acrylates/VA Crosspolymer

ACRYLATES/VA CROSSPOLYMER

4.0

A safe, synthetic thickener and film-former that helps products spread smoothly and stay put, with very low irritation risk.

Irritation

low

Source

synthetic

beautyskincaretexturizer
Read ingredient review

Film Former

Acrylates/VP Copolymer

ACRYLATES/VP COPOLYMER

3.8

A safe, synthetic film-former that helps products stay put and feel smooth, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarehaircare
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Viscosity Controlling

Acrylic Acid

Acrylic Acid

3.0

Acrylic acid is a synthetic building block for common thickeners and stabilizers, but it is rarely used directly in skincare due to potential irritation.

Irritation

moderate

Source

synthetic

beautyskincareviscosity controlling
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Film Former

Acrylic Acid Copolymer

ACRYLIC ACID/ETHYLTRIMONIUM CHLORIDE METHACRYLATE COPOLYMER

3.8

A synthetic polymer that helps products spread smoothly, hold styles, and leave a soft, non-sticky finish.

Irritation

low

Source

synthetic

beautyskincarehaircare
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Viscosity Controlling

Acrylic Acid Crosspolymer

ACRYLIC ACID/ISOPROPYLACRYLAMIDE/MIBK ACRYLAMIDE CROSSPOLYMER

3.8

A synthetic thickener that improves product texture and stability with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaretexturizer
Read ingredient review

Film Former

Acrylic Acid/VP Crosspolymer

ACRYLIC ACID/VP CROSSPOLYMER

3.8

A synthetic thickener and film former that helps create a smooth, lightweight feel in gels and serums, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincarethickener
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Film Former

Acrylic Copolymer Blend

ACRYLIC ACID/ISOBORNYL METHACRYLATE/ISOBUTYL METHACRYLATE COPOLYMER

3.5

A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefit.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film-Former

Acryloyl Morpholine

Acryloyl Morpholine

3.8

A synthetic film-former that helps products stay put on skin and resist water, but it's not a moisturizer or active ingredient.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Acryloyloxy Propyltrimethoxysilane

ACRYLOYLOXY PROPYLTRIMETHOXYSILANE

3.5

A synthetic film-former that helps products adhere to skin or nails, but may cause irritation in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarefilm-former
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Film Former

Acryloyloxyethyl Phthalate

ACRYLOYLOXYETHYL PHTHALATE

3.0

A synthetic film-forming ingredient used in nail products; limited safety data and potential for skin irritation in sensitive individuals.

Irritation

moderate

Source

synthetic

beautynail carefilm former
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Antistatic Agent

Acryloyloxyethyl Trimonium Chloride

ACRYLOYLOXYETHYL TRIMONIUM CHLORIDE

3.5

A synthetic conditioning agent that helps reduce static and improve manageability, but may cause irritation in sensitive individuals at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincarehaircare
Read ingredient review

Antioxidant

Actiniopteris Dichotoma Extract

ACTINIOPTERIS DICHOTOMA EXTRACT

3.8

A gentle fern extract with antioxidant potential, but research is limited and benefits are not yet well-established in human skin.

Irritation

low

Source

natural

beautyskincareantioxidant
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Absorbent

Activated Clay

Kaolin, Bentonite, or Illite (varies by product)

4.0

Activated clay is a gentle, natural absorbent that helps draw out excess oil and surface debris without stripping the skin.

Irritation

low

Source

natural

beautyskincareabsorbent
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Cell-communicating ingredient

Adamantanyl Dihydroxybenzamide

ADAMANTANYL DIHYDROXYBENZAMIDE

3.8

A synthetic retinoid-like ingredient that may help smooth fine lines and improve skin texture, but can cause irritation in sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincareactive
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Skin conditioning agent

Adamantanyl Hydroxybenzamide

ADAMANTANYL HYDROXYBENZAMIDE

3.5

A newer synthetic ingredient that may help firm skin and reduce wrinkles, but research is still early.

Irritation

low

Source

synthetic

beautyskincareanti-aging
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Skin conditioning agent

Adamantylcarboxamido Methylhydroxybenzamide

ADAMANTANYLCARBOXAMIDO METHYLHYDROXYLBENZAMIDE

3.8

A synthetic ingredient that mimics a natural signaling peptide to help improve skin firmness and smooth wrinkles, but research is still emerging.

Irritation

low

Source

synthetic

beautyskincareanti-aging
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Soothing Agent

Adder's Tongue Fern Extract

Ophioglossum Vulgatum Extract

3.8

A gentle fern extract with antioxidant and soothing potential, but research is limited and benefits are not yet well-established.

Irritation

low

Source

natural

beautyskincarebotanical
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Skin conditioning agent

Adenine

Adenine

3.8

Adenine is a gentle, naturally derived ingredient that may help support skin repair, but research in cosmetics is still limited.

Irritation

low

Source

natural

beautyskincareconditioning agent
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Antioxidant

Adenophora Stricta Root Extract

Adenophora Stricta Root Extract

3.8

A gentle, antioxidant-rich root extract that may help calm skin and fight free radical damage, though research is still early.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Adenophora Taquetii Extract

ADENOPHORA TAQUETII EXTRACT

3.8

A gentle plant extract with antioxidant potential, but research is limited and benefits are not yet well-established.

Irritation

low

Source

natural

beautyskincareantioxidant
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Anti-aging agent

Adenosine

Adenosine

4.3

Adenosine is a gentle, science-backed anti-aging ingredient that helps smooth fine lines and improve skin firmness without irritation.

Irritation

low

Source

natural

beautyskincareanti-aging
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Cell-communicating agent

Adenosine Cyclic Phosphate

Adenosine Cyclic Phosphate

3.8

A cellular messenger that may help support skin firmness and resilience, but research in topical cosmetics is still limited.

Irritation

low

Source

biotech

beautyskincarecell-communicating ingredient
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Skin-conditioning agent

Adenosine Phosphate

Adenosine Phosphate

3.8

Adenosine phosphate is a gentle, energy-boosting ingredient that may help smooth fine lines and support skin firmness over time.

Irritation

low

Source

natural

beautyskincareanti-aging
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Skin conditioning agent

Adenosine Triphosphate

Adenosine Triphosphate

4.0

Adenosine triphosphate (ATP) is the energy currency of cells, and when applied topically, it may help energize skin cells to support a firmer, more youthful appearance.

Irritation

low

Source

biotech

beautyskincareconditioning agent
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Emollient

Adesmia Boronioides Oil

ADESMIA BORONIOIDES FLOWER/LEAF/STEM OIL

4.0

A gentle, antioxidant-rich oil from Patagonia that helps soothe and soften skin without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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