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 1,097
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

Alkyl Glucosidyl Silicone Blend

C8-12 ALKYL GLUCOSIDYL HYDROXYCYCLOHEXYLETHYL PEG-18/PPG-6 DIMETHICONE

3.8

A gentle, silicone-based cleansing and texturizing ingredient that helps products spread smoothly without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactantemulsifier
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Surfactant

Almondamide DEA

Almondamide DEA

3.5

Almondamide DEA helps create rich lather and thicker textures, but it is a semi-synthetic ingredient with moderate irritation potential for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Almondamidopropylamine Oxide

ALMONDAMIDOPROPYLAMINE OXIDE

4.0

A gentle, almond-derived surfactant that helps create a rich lather without stripping the skin, making it a good choice for sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Aminoethyl Sulfate

AMINOETHYL SULFATE

3.5

A mild synthetic surfactant that helps cleanse and adjust pH, but may cause irritation in sensitive skin at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Ammonium C9-10 Perfluoroalkylsulfonate

AMMONIUM C9-10 PERFLUOROALKYLSULFONATE

2.5

A synthetic surfactant with strong water-repellent properties, but its safety and environmental impact are under scrutiny due to its perfluoroalkyl structure.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Ammonium Cocoyl Isethionate

Ammonium Cocoyl Isethionate

4.5

A mild, coconut-derived surfactant that cleans effectively without stripping the skin, making it a popular sulfate-free alternative.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Ammonium Isostearate

AMMONIUM ISOSTEARATE

3.5

Ammonium Isostearate is a mild cleansing agent that helps mix oil and water, but it may cause irritation for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Ammonium Oleate

Ammonium Oleate

3.8

Ammonium Oleate is an effective cleanser and emulsifier, but it can be drying or irritating for sensitive skin due to its soap-like nature.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Ammonium Perfluorohexyl Ethylphosphates

Ammonium Perfluorohexyl Ethylphosphates

3.5

A synthetic emulsifier that helps formulas spread evenly and resist water, but it belongs to a chemical family under environmental scrutiny.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Ammonium Xylenesulfonate

AMMONIUM XYLENESULFONATE

3.5

A mild synthetic helper that keeps formulas stable and clear, but offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Apricotamide DEA

APRICOTAMIDE DEA

3.5

Apricotamide DEA is a mild surfactant that helps create rich lather, but it may cause irritation for sensitive skin and has raised some safety concerns due to its DEA content.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Arachideth-20

ARACHIDETH-20

3.5

Arachideth-20 is a gentle synthetic emulsifier that helps mix oil and water in cleansers and lotions, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Emulsifier

Arachideth-22

ARACHIDETH-22

3.8

A gentle synthetic emulsifier that helps mix oil and water in creams and cleansers, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Arachideth-27

ARACHIDETH-27

3.8

Arachideth-27 is a gentle synthetic emulsifier that helps mix water and oil in cleansers and lotions, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Arachideth-32

ARACHIDETH-32

3.5

A synthetic emulsifier that helps mix oil and water but may be slightly drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Arachideth-42

ARACHIDETH-42

3.5

Arachideth-42 is a synthetic emulsifier that helps mix water and oil, but it may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Arachidyl Glucoside

Arachidyl Glucoside

4.5

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Avocadamide DEA

AVOCADAMIDE DEA

3.5

Avocadamide DEA is a mild foam booster and thickener for cleansers, but its DEA component raises some safety questions.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Avocadamide DIPA

Avocadamide DIPA

4.0

A gentle, avocado-derived surfactant that helps create rich lather without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Emollient

Babassu Acid

BABASSU ACID

4.0

Babassu Acid is a gentle, plant-derived fatty acid that cleanses and softens skin without stripping moisture.

Irritation

low

Source

natural

beautyskincareemollientsurfactant
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Surfactant

Babassuamide DEA

BABASSUAMIDE DEA

3.5

A mild foaming agent from babassu oil that helps create rich lather, but may cause irritation for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Behenamide DEA

Behenamide DEA

3.5

Behenamide DEA helps create rich lather and thick texture in cleansers, but it has moderate irritation potential and environmental concerns.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Viscosity Controlling

Behenamide MEA

Behenamide MEA

3.5

Behenamide MEA is a mild thickening and foaming agent that helps create a rich lather in cleansers, but it offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Behenamidopropyl Betaine

Behenamidopropyl Betaine

4.0

A gentle, coconut-derived surfactant that helps create rich foam and a silky feel in cleansers and conditioners, with low irritation potential.

Irritation

low

Source

semi-synthetic

beautyskincarehaircaresurfactant
Read ingredient review

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
Read ingredient review

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-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
Read ingredient review

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
Read ingredient review

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

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
Read ingredient review

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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Surfactant

Bis-Hexyldioxodecyl Methyl Lysinate

BIS-HEXYLDIOXODECYL METHYL LYSINATE

4.0

A mild, amino-acid-based surfactant that cleanses without stripping the skin barrier — a good choice for sensitive or dry skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Buteth-3

BUTETH-3

3.5

Buteth-3 is a synthetic helper ingredient that blends oil and water, but it may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C11-13 Pareth-10

C11-13 PARETH-10

3.5

A gentle cleansing agent that helps remove dirt and oil, but may cause mild irritation for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C11-13 Pareth-6

C11-13 PARETH-6

3.8

A gentle cleansing agent that helps remove dirt and oil without stripping the skin, but may cause mild irritation for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C11-15 Pareth-12

C11-15 SEC-PARETH-12

3.5

A gentle synthetic cleanser that helps remove dirt and oil, but may be slightly drying for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C11-15 Pareth-15

C11-15 PARETH-15

4.0

A mild synthetic surfactant that helps cleansers foam and rinse cleanly without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C11-15 Pareth-20

C11-15 PARETH-20

4.0

A gentle synthetic emulsifier that helps mix oil and water, widely used in cleansers and considered safe at typical levels.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C11-15 Pareth-3

C11-15 Pareth-3

3.8

A gentle synthetic emulsifier that helps cleansers foam and rinse cleanly, but may cause mild irritation for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C11-15 Pareth-30

C11-15 PARETH-30

3.8

A gentle synthetic emulsifier that helps mix oil and water, but may cause mild irritation for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C11-15 Pareth-40

C11-15 PARETH-40

3.8

A gentle synthetic emulsifier that helps mix oil and water, but may cause mild irritation for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C11-15 Pareth-5

C11-15 Pareth-5

3.5

A synthetic emulsifier that helps cleansers and lotions mix and rinse clean, but may be slightly drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C11-15 Pareth-7

C11-15 Pareth-7

3.5

A synthetic emulsifier that helps mix oil and water, but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C11-15 Pareth-9

C11-15 Pareth-9

3.8

A gentle cleansing agent that helps remove dirt and oil without stripping the skin, but may cause irritation for very sensitive skin types.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C11-21 Pareth-3

C11-21 Pareth-3

3.8

A mild synthetic emulsifier that helps mix oil and water in rinse-off products, generally well-tolerated.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-13 Pareth-10 Phosphate

C12-13 PARETH-10 PHOSPHATE

4.0

A gentle synthetic surfactant that helps cleanse without stripping the skin, commonly used in mild foaming cleansers.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-13 Pareth-2

C12-13 PARETH-2

4.0

A gentle, effective surfactant that helps cleanse without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

C12-13 Pareth-2 Phosphate

C12-13 PARETH-2 PHOSPHATE

4.0

A mild synthetic surfactant that helps cleansers foam and rinse cleanly without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-13 Pareth-3

C12-13 PARETH-3

4.0

A gentle synthetic surfactant that helps cleanse without stripping the skin, but may not be suitable for ultra-sensitive skin in high concentrations.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-13 Pareth-6

C12-13 PARETH-6

4.0

A gentle, effective surfactant that helps cleanse without stripping the skin, making it a common choice for mild formulas.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-13 Pareth-7

C12-13 PARETH-7

3.8

A gentle synthetic emulsifier that helps cleansers foam and creams feel smooth, but may be slightly drying for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-14 Pareth-3

C12-14 Pareth-3

4.0

A gentle surfactant that helps cleansers foam and rinse cleanly without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-14 Pareth-5

C12-14 Pareth-5

3.8

A gentle cleansing ingredient that helps products foam and rinse clean without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review