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 626
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

Acetyl Carboxymethyl Cocoyl Glycine

Acetyl Carboxymethyl Cocoyl Glycine

4.0

A mild, coconut-derived cleansing agent that effectively removes dirt and oil without stripping the skin’s natural moisture barrier.

Irritation

low

Source

semi-synthetic

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Surfactant

Almondamidopropyl Betaine

Almondamidopropyl Betaine

4.0

A gentle, almond-derived surfactant that cleanses without stripping the skin, making it a solid choice for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

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Surfactant

Amino Acid Surfactant Blend

SODIUM BEHENOYL/COCOYL (ARGININE/GLUTAMIC ACID/ISOLEUCINE/LEUCINE/LYSINE/PHENYLALANINE/PROLINE/THREONINE/VALINE)

4.5

A gentle, amino-acid-based surfactant that cleanses without stripping the skin barrier.

Irritation

low

Source

semi-synthetic

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Surfactant

Aminopropyl Laurylglutamine

Aminopropyl Laurylglutamine

4.3

A gentle, amino-acid-based cleanser that effectively removes dirt and oil without stripping the skin, making it ideal for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

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Surfactant

Ammonium C12-15 Alkyl Sulfate

AMMONIUM C12-15 ALKYL SULFATE

3.5

A strong cleanser that effectively removes dirt and oil but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

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Surfactant

Ammonium Coco-Sulfate

AMMONIUM COCO-SULFATE

4.0

A gentle, coconut-derived cleanser that effectively removes dirt and oil without stripping the skin.

Irritation

low

Source

semi-synthetic

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Surfactant

Ammonium Dinonyl Sulfosuccinate

AMMONIUM DINONYL SULFOSUCCINATE

3.5

A mild-ish synthetic cleanser that helps products foam and remove dirt, but may be drying for very sensitive skin.

Irritation

moderate

Source

synthetic

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Surfactant

Ammonium Laureth Sulfate

AMMONIUM LAURETH SULFATE

3.5

A strong foaming cleanser that can strip the skin's natural oils, best for oily or resilient skin types.

Irritation

moderate

Source

synthetic

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Surfactant

Ammonium Lauryl Sulfate

AMMONIUM LAURYL SULFATE

3.5

A strong, effective cleanser that can be drying or irritating for sensitive skin, but is generally safe in rinse-off formulas.

Irritation

moderate

Source

synthetic

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Surfactant

Ammonium Lauryl Sulfosuccinate

Ammonium Lauryl Sulfosuccinate

4.5

A mild, sulfate-free surfactant that cleanses effectively without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

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Surfactant

Ammonium Myreth Sulfate

Ammonium Myreth Sulfate

3.8

A common foaming cleanser ingredient that is generally milder than SLS but can still be drying for sensitive skin.

Irritation

moderate

Source

synthetic

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Surfactant

Ammonium Palm Kernel Sulfate

AMMONIUM PALM KERNEL SULFATE

3.5

A strong foaming cleanser that effectively removes oil and dirt but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

natural

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Surfactant

Arginine Hexadecyl Phosphate

Arginine Hexadecyl Phosphate

4.0

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

Irritation

low

Source

semi-synthetic

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Surfactant

Arginine Lauraminopropionate

ARGININE LAURAMINOPROPIONATE

4.0

A mild, amino-acid-based surfactant that effectively cleanses while being gentle on sensitive or dry skin.

Irritation

low

Source

semi-synthetic

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Surfactant

Arginine Lauroyl Glutamate

ARGININE LAUROYL GLUTAMATE

4.5

A mild, amino-acid-based cleanser that effectively removes dirt and oil while respecting the skin barrier.

Irritation

low

Source

semi-synthetic

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Surfactant

Arginine PEG-4 Cocamide Sulfate

ARGININE PEG-4 COCAMIDE SULFATE

3.8

A gentle, coconut-derived surfactant that cleanses without stripping the skin, making it a good choice for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

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Surfactant

Avocadamidopropyl Betaine

Avocadamidopropyl Betaine

4.3

A gentle, avocado-derived surfactant that cleanses without stripping the skin, ideal for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

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Surfactant

Babassuamidopropyl Betaine

BABASSUAMIDOPROPYL BETAINE

4.3

A gentle, plant-derived surfactant that cleanses effectively while being kind to sensitive and dry skin types.

Irritation

low

Source

natural

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Surfactant

Brassicyl Aminolaurate Esylate

BRASSICYL AMINOLAURATE ESYLATE

4.3

A mild, plant-derived surfactant that effectively cleanses while respecting the skin barrier — ideal for sensitive or dry skin.

Irritation

low

Source

semi-synthetic

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Surfactant

Butylglucoside Caprate

Butylglucoside Caprate

4.3

A gentle, biodegradable surfactant that cleanses effectively while being kind to sensitive skin.

Irritation

low

Source

semi-synthetic

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Surfactant

C10-16 Alkyl Glucoside

C10-16 Alkyl Glucoside

4.5

A gentle, plant-based surfactant that effectively cleanses without stripping the skin's natural moisture barrier.

Irritation

low

Source

natural

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Surfactant

C12-18 Alkyl Glucoside

C12-18 Alkyl Glucoside

4.5

A mild, plant-based surfactant that cleanses without stripping the skin's natural moisture barrier.

Irritation

low

Source

natural

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Surfactant

C20-22 Alkyl Glucoside

C20-22 Alkyl Glucoside

4.5

A gentle, non-stripping surfactant that cleanses without disrupting the skin barrier, ideal for sensitive skin.

Irritation

low

Source

semi-synthetic

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Surfactant

C9-11 Alkyl Glucoside

C9-11 Alkyl Glucoside

4.5

A gentle, plant-based surfactant that cleanses without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

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Surfactant

Calcium Lauroyl Taurate

Calcium Lauroyl Taurate

4.3

A mild, sulfate-free surfactant that creates a rich lather without stripping the skin, making it a favorite for sensitive and dry skin types.

Irritation

low

Source

semi-synthetic

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Surfactant

Capryl Sultaine

Capryl Sultaine

4.3

A gentle, coconut-derived surfactant that cleanses without stripping the skin, ideal for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

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Surfactant

Capryleth-4 Carboxylic Acid

Capryleth-4 Carboxylic Acid

4.0

A gentle, synthetic surfactant that effectively cleanses without stripping the skin’s natural moisture barrier.

Irritation

low

Source

synthetic

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Surfactant

Capryloyl Pea Amino Acids

CAPRYLOYL PEA AMINO ACIDS

4.3

A mild, eco-friendly cleanser derived from pea amino acids that effectively removes dirt and oil without disrupting your skin barrier.

Irritation

low

Source

natural

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Surfactant

Capryloyl Sarcosine

Capryloyl Sarcosine

4.3

A mild, amino-acid-based surfactant that cleanses effectively while respecting the skin barrier.

Irritation

low

Source

semi-synthetic

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Surfactant

Capryloyl/Caproyl Methyl Glucamide

CAPRYLOYL/CAPROYL METHYL GLUCAMIDE

4.5

A gentle, plant-derived surfactant that cleanses effectively without stripping the skin barrier, making it ideal for sensitive and dry skin types.

Irritation

low

Source

semi-synthetic

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Surfactant

Caprylyl Glucoside

Caprylyl Glucoside

4.5

A gentle, plant-based surfactant that effectively cleanses without stripping the skin's natural moisture barrier.

Irritation

low

Source

natural

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Surfactant

Cetyl Betainate Chloride

Cetyl Betainate Chloride

4.0

A gentle, conditioning surfactant that cleanses without stripping the skin, making it ideal for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

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Surfactant

Cocamidoethyl Betaine

Cocamidoethyl Betaine

4.0

A gentle, coconut-derived cleansing agent that helps create a rich lather without stripping the skin.

Irritation

low

Source

semi-synthetic

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Surfactant

Cocaminobutyric Acid

Cocaminobutyric Acid

3.8

A gentle, coconut-derived surfactant that cleanses without stripping the skin barrier, suitable for sensitive skin.

Irritation

low

Source

semi-synthetic

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Surfactant

Cocaminopropionic Acid

Cocaminopropionic Acid

4.0

A gentle, coconut-derived cleanser that effectively removes dirt and oil without stripping the skin, making it ideal for sensitive or dry skin types.

Irritation

low

Source

natural

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Surfactant

Coceth-4 Glucoside

Coceth-4 Glucoside

4.0

A gentle, plant-derived cleansing agent that effectively removes dirt and oil without stripping the skin.

Irritation

low

Source

semi-synthetic

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