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

Surfactant

Behenamine Oxide

Behenamine Oxide

3.8

Behenamine Oxide is a gentle surfactant that helps create rich lather and stabilize formulas, but it's less common in modern 'clean' beauty due to its synthetic origin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Emulsifier

Beheneth-10

Beheneth-10

4.0

Beheneth-10 is a gentle, synthetic emulsifier that helps mix oil and water in products, making it a safe choice for most skin types, including sensitive skin.

Irritation

low

Source

synthetic

beautyskincaresurfactantemulsifier
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Emulsifier

Beheneth-15

BEHENETH-15

4.0

Beheneth-15 is a gentle synthetic emulsifier that helps oil and water mix in creams and lotions, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Beheneth-2

Beheneth-2

4.0

Beheneth-2 is a gentle emulsifier that helps creamy products stay smooth and stable, with a very low risk of irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Beheneth-20

Beheneth-20

4.0

A gentle, non-drying emulsifier that helps create stable, creamy formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Beheneth-25

BEHENETH-25

4.0

Beheneth-25 is a gentle, non-irritating emulsifier that helps cleanse without stripping the skin, making it a solid choice for sensitive skin formulas.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Beheneth-30

BEHENETH-30

4.0

Beheneth-30 is a mild, low-irritation emulsifier that helps mix oil and water in cleansers and creams, making it a good choice for sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Beheneth-30 Phosphate

BEHENETH-30 PHOSPHATE

4.0

Beheneth-30 Phosphate is a gentle, synthetic surfactant that effectively cleanses and helps mix oil and water without stripping the skin.

Irritation

low

Source

synthetic

beautyskincarecleansingemulsifier
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Emulsifier

Beheneth-5

BEHENETH-5

3.8

Beheneth-5 is a gentle synthetic emulsifier that helps oil and water mix, making creams and lotions feel smooth without heavy irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Emollient

Behenic Acid

Behenic Acid

4.0

A gentle, plant-derived fatty acid that helps thicken formulas and soften skin without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Behenoxy Dimethicone

Behenoxy Dimethicone

4.0

A gentle silicone that smooths and softens skin without clogging pores, ideal for dry or sensitive types.

Irritation

low

Source

synthetic

beautyskincareemollient
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Skin Conditioning Agent

Behenoyl Stearic Acid

Behenoyl Stearic Acid

3.5

Behenoyl Stearic Acid is a gentle synthetic ingredient that helps condition skin and stabilize emulsions, but it is not a standout active.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Antistatic Agent

Behentrimonium Chloride

Behentrimonium Chloride

4.2

A gentle, effective conditioning ingredient that detangles hair and reduces static without heavy buildup.

Irritation

low

Source

synthetic

beautyskincarehaircare
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Conditioning Agent

Behentrimonium Methosulfate

Behentrimonium Methosulfate

4.5

A gentle, plant-derived conditioning ingredient that softens hair and skin without the heavy buildup or irritation of older quaternary ammonium compounds.

Irritation

low

Source

semi-synthetic

beautyskincarehaircareconditioning agent
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Emollient

Behenyl Alcohol

BEHENYL ALCOHOL

4.5

Behenyl alcohol is a gentle, plant-derived fatty alcohol that thickens and stabilizes formulas without clogging pores or irritating skin.

Irritation

low

Source

natural

beautyskincareemollientthickener
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Emollient

Behenyl Beeswax

Behenyl Beeswax

4.0

Behenyl Beeswax is a gentle, plant-derived wax that helps thicken and stabilize formulas without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Behenyl Behenate

Behenyl Behenate

4.2

Behenyl behenate is a gentle, plant-based wax that gives products a smooth, creamy texture without clogging pores or causing irritation.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Behenyl Benzoate

Behenyl Benzoate

4.0

A gentle, non-greasy emollient that improves product feel and spreadability without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Surfactant

Behenyl Betaine

Behenyl Betaine

4.3

A mild, conditioning surfactant that cleans without stripping, making it ideal for sensitive skin and dry hair.

Irritation

low

Source

semi-synthetic

beautyskincarehaircaresurfactant
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Emollient

Behenyl Dimer Dilinoleate Complex

BEHENYL/DIMER DILINOLEYL/GLYCERYL/PHYTOSTERYL DIMER DILINOLEATE

4.0

A gentle, plant-based emollient that helps soften and smooth skin without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emollient

Behenyl Dimethicone

BEHENYL DIMETHICONE

4.3

A gentle silicone that improves product feel and spreadability, suitable for most skin types including sensitive skin.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Emollient

Behenyl Erucate

BEHENYL ERUCATE

4.0

A gentle, plant-based emollient that helps lock in moisture and leaves skin feeling soft without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Behenyl Isostearate

Behenyl Isostearate

4.0

A gentle, plant-derived emollient that softens skin and gives a silky feel to creams and lip products without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Film Former

Behenyl Methacrylate Copolymer

BEHENYL METHACRYLATE/PERFLUOROOCTYLETHYL METHACRYLATE COPOLYMER

3.5

A synthetic film-former that helps products stay put longer, especially in water-resistant sunscreens and long-wear makeup.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Emollient

Behenyl Olivate

Behenyl Olivate

4.3

A gentle, plant-based emollient that softens skin and improves product texture without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Humectant

Behenyl PCA

Behenyl PCA

4.0

Behenyl PCA is a gentle, moisturizing ingredient that helps improve skin hydration and softness without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareconditioning agent
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Emollient

Behenyl/Isostearyl Beeswax

BEHENYL/ISOSTEARYL BEESWAX

4.0

A gentle, plant-friendly wax alternative that helps create smooth, stable textures in balms and creams.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Soothing Agent

Belamcanda Chinensis Root Extract

Belamcanda Chinensis Root Extract

3.8

A gentle botanical extract with antioxidant and soothing potential, though research on its cosmetic benefits is still emerging.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Belladonna Lily Extract

Amaryllis Belladonna Flower/Leaf/Stem Extract

3.5

A gentle botanical extract with antioxidant potential, but research on its specific skincare benefits is still limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Belleric Myrobalan Fruit Water

Terminalia Bellerica Fruit Water

4.0

A gentle, antioxidant-rich fruit water that helps protect skin from environmental stress and supports a balanced complexion.

Irritation

low

Source

natural

beautyskincareantioxidant
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UV Filter

Bemotrizinol

BIS-ETHYLHEXYLOXYPHENOL METHOXYPHENYL TRIAZINE

4.5

A highly photostable, broad-spectrum sunscreen filter that offers excellent UVA and UVB protection with minimal irritation risk.

Irritation

low

Source

synthetic

beautyskincaresunscreen
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Antioxidant

Bengal Psilanthus Leaf Cell Extract

PSILANTHUS BENGALENSIS LEAF CELL CULTURE EXTRACT

4.0

A gentle, lab-grown plant cell extract that may help protect skin from environmental stress and support a more even tone.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Absorbent

Bentonite

Bentonite

4.0

Bentonite clay is a gentle, natural absorbent that helps draw out oil and dirt from the skin without harsh stripping.

Irritation

low

Source

natural

beautyskincareabsorbent
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Fragrance Ingredient

Benzaldehyde

Benzaldehyde

3.5

Benzaldehyde adds a pleasant almond-like scent to products but can be a skin sensitizer for some people, especially at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
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Fragrance Ingredient

Benzaldehyde Dimethylacetal

Benzaldehyde Dimethylacetal

3.5

A synthetic fragrance compound that adds a sweet, almond-like scent but may cause skin irritation in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
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Fragrance Ingredient

Benzaldehyde Glyceryl Acetal

BENZALDEHYDE GLYCERYL 1,3-CYCLIC ACETAL

3.5

A synthetic fragrance ingredient that adds a mild almond note; generally safe at low concentrations but may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
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Fragrance Ingredient

Benzaldehyde Propyleneglycol Acetal

BENZALDEHYDE PROPYLENEGLYCOL ACETAL

3.5

A synthetic fragrance compound that adds a sweet, almond-like scent but may cause irritation in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
Read ingredient review

Preservative

Benzalkonium Chloride

Benzalkonium Chloride

3.0

Effective preservative but can be irritating for sensitive skin or eyes; better suited for rinse-off products.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
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Preservative

Benzalkonium Saccharinate

Benzalkonium Saccharinate

3.5

Benzalkonium Saccharinate is an effective preservative, but it may cause irritation for some, especially those with sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
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Viscosity Controlling

Benzalkonium Sepiolite

Benzalkonium Sepiolite

3.5

A modified clay that thickens and stabilizes formulas, generally safe but not a skin-active ingredient.

Irritation

low

Source

semi-synthetic

beautyskincarecosmetic
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Fragrance Ingredient

Benzalphthalide

Benzalphthalide

3.5

Benzalphthalide is a synthetic fragrance ingredient with limited safety data; it may cause skin irritation in sensitive individuals and is best avoided in leave-on products for reactive skin.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
Read ingredient review

pH Adjuster

Benzenesulfonyltromethamide

BENZENESULFONYLTROMETHAMIDE

3.0

A synthetic pH adjuster with limited research on skin benefits; generally considered safe at low levels but not a star ingredient.

Irritation

low

Source

synthetic

beautyskincarepH adjuster
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Preservative

Benzethonium Chloride

Benzethonium Chloride

3.5

An effective preservative for rinse-off products, but can be irritating for sensitive skin or in leave-on formulas.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
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Fragrance Ingredient

Benzhydrol

BENZHYDROL

3.5

Benzhydrol is a synthetic fragrance ingredient with a mild floral scent, considered safe at low concentrations but best avoided by those with sensitive skin or fragrance allergies.

Irritation

low

Source

synthetic

beautyskincarefragrance
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Exfoliant

Benzilic Acid

Benzilic Acid

3.5

Benzilic acid is a lesser-known AHA that may offer gentle exfoliation and brightening, but research is limited compared to glycolic or lactic acid.

Irritation

moderate

Source

synthetic

beautyskincareexfoliant
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Other

Benzimidazole

Benzimidazole

1.0

Benzimidazole is not a typical skincare ingredient and has limited safety data for cosmetic use; it is best avoided in leave-on products until more research is available.

Irritation

moderate

Source

synthetic

beautyskincareother
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Film Former

Benzimidazole Diamond Siloxane

Benzimidazole Diamond Amidoethyl Urea Carbamoyl Propyl Polymethylsilsesquioxane

3.5

A novel silicone-diamond hybrid that adds a soft-focus, silky finish to makeup and skincare, but research on its long-term effects is limited.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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UV Absorber

Benzimidazole UV Filter

Dihydroxyphenyl Benzimidazole Carboxylic Acid

4.0

A synthetic UVA filter that helps protect skin from deeper sun damage, but it's less common in the US and more often found in international sunscreens.

Irritation

low

Source

synthetic

beautyskincaresunscreen
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Preservative

Benzisothiazolinone

Benzisothiazolinone

3.5

An effective preservative but a known allergen that can cause contact dermatitis in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
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Antioxidant

Benzofuran Derivative

HYDROXYMETHOXYPHENYL PROPYLMETHYLMETHOXYBENZOFURAN

3.5

A synthetic antioxidant that may help protect skin from environmental stress, but research is limited and it's not widely used.

Irritation

low

Source

synthetic

beautyskincareantioxidant
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