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 278
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

Alanine Glutamate

Alanine Glutamate

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Amino Acid Surfactant Complex

Sodium Behenoyl/Cocoyl (Alanine/Arginine/Asparagine/Aspartic Acid/Glutamic Acid/Glycine/Isoleucine/Leucine/Lysine/Methionine/Phenylalanine/Proline/Serine/Threonine/Tryptophan/Tyrosine/Valine)

4.5

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

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Ammonium Cumenesulfonate

AMMONIUM CUMENESULFONATE

3.5

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

Irritation

low

Source

synthetic

beautyskincarecleansing
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Surfactant

Ammonium Laureth-6 Carboxylate

AMMONIUM LAURETH-6 CARBOXYLATE

4.0

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

Irritation

low

Source

synthetic

beautyskincarecleansing
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Surfactant

Ammonium Laureth-8 Carboxylate

AMMONIUM LAURETH-8 CARBOXYLATE

4.0

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

Irritation

low

Source

synthetic

beautyskincarecleansing
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Surfactant

Ammonium Lauroyl Sarcosinate

AMMONIUM LAUROYL SARCOSINATE

4.3

A gentle, amino-acid-based surfactant that cleans effectively while being kinder to sensitive skin than traditional sulfates.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Ammonium Myristyl Sulfate

Ammonium Myristyl Sulfate

3.8

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

Irritation

moderate

Source

synthetic

beautyskincarecleansing
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Surfactant

Ammonium Nonoxynol-4 Sulfate

AMMONIUM NONOXYNOL-4 SULFATE

3.5

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

Irritation

moderate

Source

synthetic

beautyskincarecleansing
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Surfactant

Arginine Cocoate

Arginine Cocoate

4.0

A mild, coconut-derived cleansing agent that helps clean skin without stripping its natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Babassuamide MEA

Babassuamide MEA

4.0

A gentle, plant-derived surfactant that helps create a rich lather while being kinder to skin than many harsher cleansers.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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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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Surfactant

Butoxynol-19 Carboxylic Acid

Butoxynol-19 Carboxylic Acid

3.8

An effective synthetic cleanser that can be drying for sensitive skin, but is generally safe in well-formulated products.

Irritation

moderate

Source

synthetic

beautyskincarecleansing
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Surfactant

Butoxynol-5 Carboxylic Acid

Butoxynol-5 Carboxylic Acid

3.5

A synthetic surfactant that effectively cleanses but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleansing
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Surfactant

Butyl Glucoside

Butyl Glucoside

4.0

A gentle, plant-based surfactant that effectively cleanses without over-drying, making it a good choice for sensitive skin.

Irritation

low

Source

natural

beautyskincarecleansing
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Surfactant

C10-16 Pareth-1

C10-16 PARETH-1

3.8

A gentle synthetic surfactant that helps cleanse and emulsify oils without stripping the skin.

Irritation

low

Source

synthetic

beautyskincarecleansing
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Surfactant

C10-16 Pareth-2

C10-16 PARETH-2

3.8

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

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

C11-21 Pareth-10

C11-21 Pareth-10

4.0

A gentle synthetic emulsifier that helps cleansers rinse cleanly without stripping the skin.

Irritation

low

Source

synthetic

beautyskincarecleansing
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Surfactant

C12-13 Pareth-10

C12-13 PARETH-10

4.0

A gentle, effective surfactant that helps cleanse and emulsify without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

C12-13 Pareth-4

C12-13 PARETH-4

4.0

A gentle, low-irritation surfactant that helps cleanse and emulsify without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

C12-13 Pareth-9

C12-13 PARETH-9

3.8

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

Irritation

moderate

Source

synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

C12-14 Pareth-11

C12-14 Pareth-11

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

C12-14 Sec-Pareth-3

C12-14 SEC-PARETH-3

3.8

An effective cleansing agent that helps remove dirt and oil, but may be slightly drying for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

C12-15 Pareth-8 Carboxylic Acid

C12-15 PARETH-8 CARBOXYLIC ACID

4.0

A gentle, semi-synthetic surfactant that effectively cleanses without stripping the skin barrier, making it a good choice for sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

C12-20 Alkyl Glucoside

C12-20 Alkyl Glucoside

4.5

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

Irritation

low

Source

natural

beautyskincarecleansing
Read ingredient review

Surfactant

C16-22 Acid Amide MEA

C16-22 Acid Amide MEA

3.8

A mild synthetic ingredient that helps create a rich, stable lather and a creamy feel in cleansers, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

C30-50 Pareth-10

C30-50 PARETH-10

4.0

A mild, large-molecule surfactant that cleanses without stripping the skin barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

C9-11 Pareth-6 Carboxylic Acid

C9-11 PARETH-6 CARBOXYLIC ACID

4.0

A gentle, semi-synthetic surfactant that effectively cleanses without over-drying, making it a good choice for sensitive or dry skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Viscosity Controlling

Calcium Laurate

Calcium Laurate

3.5

Calcium Laurate is a mild cleansing and thickening agent, generally safe but not a star active ingredient.

Irritation

low

Source

synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Caprylamide MEA

Caprylamide MEA

3.8

Caprylamide MEA is a gentle, coconut-derived surfactant that helps create a rich lather without stripping the skin, making it a good alternative to harsher cleansers.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Capryleth-6 Carboxylic Acid

Capryleth-6 Carboxylic Acid

4.0

A gentle, low-irritation cleansing ingredient that effectively removes dirt and oil while being kind to sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Capryloyl Glycine

Capryloyl Glycine

4.3

A mild, amino-acid-based ingredient that gently cleanses and helps calm skin without stripping moisture.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Capryloyl Quinoa Amino Acids

CAPRYLOYL QUINOA AMINO ACIDS

4.2

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

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Capryloyl Silk Amino Acids

CAPRYLOYL SILK AMINO ACIDS

4.0

A mild, silk-derived cleansing agent that cleans without stripping the skin, making it ideal for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincarecleansingconditioning
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Surfactant

Caprylyl/Capryl Xylosides

CAPRYLYL/CAPRYL XYLOSIDES

4.5

A gentle, plant-based surfactant that effectively cleanses without stripping the skin, making it a great choice for sensitive or dry skin types.

Irritation

low

Source

natural

beautyskincarecleansing
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Surfactant

Cetyl PPG-2 Isodeceth-7 Carboxylate

CETYL PPG-2 ISODECETH-7 CARBOXYLATE

4.0

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

Irritation

low

Source

synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Cetyl/Lauryl/Myristyl Hydroxysultaine

Cetyl/Lauryl/Myristyl Hydroxysultaine

4.0

A gentle, low-irritation surfactant blend that cleanses effectively without stripping the skin, making it a great choice for sensitive or dry skin types.

Irritation

low

Source

synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Cocamide MIPA

Cocamide MIPA

3.5

Cocamide MIPA is a coconut-derived ingredient that helps create rich lather, but it may be mildly irritating for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Cocamidopropyl Morpholine Lactate

Cocamidopropyl Morpholine Lactate

3.5

A mild surfactant that helps create rich foam and leaves skin feeling soft, but may cause irritation for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Coceth-7 Carboxylic Acid

Coceth-7 Carboxylic Acid

4.0

A gentle, coconut-derived cleansing ingredient that effectively removes dirt and oil while being kind to sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Coco Glucoside Crosspolymer

Sodium Hydroxypropylsulfonate Cocoglucoside Crosspolymer

4.3

A mild, plant-based cleansing polymer that helps create a creamy, non-stripping lather — great for sensitive or dry skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Coco-Morpholine Oxide

COCO-MORPHOLINE OXIDE

4.0

A gentle, coconut-derived surfactant that helps create rich foam without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Coco/Oleamidopropyl Betaine

Coco/Oleamidopropyl Betaine

4.2

A gentle, plant-derived surfactant that helps create rich lather while being kinder to skin than harsher cleansers.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Coco/Tallow Sulfate Blend

SODIUM COCO/HYDROGENATED TALLOW SULFATE

3.5

An effective but potentially drying cleanser that may irritate sensitive skin; best for normal-to-oily skin types.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Coconut Oil Amides

Coconut Oil Aminoethoxyethanol Amides

3.8

A mild, coconut-derived cleansing agent that helps create a rich lather while being gentler on skin than some traditional sulfates.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Coconut Oil MIPA Amides

Coconut Oil MIPA Amides

3.8

A gentle, coconut-derived surfactant that helps create a rich lather and effectively remove dirt and oil without being overly harsh.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Cocoyl Hydrolyzed Collagen

Cocoyl Hydrolyzed Collagen

4.0

A mild, coconut-derived cleanser that helps remove dirt and oil while leaving skin feeling soft, not tight.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Deceth-7

DECETH-7

4.0

A gentle synthetic surfactant that helps cleansers foam and rinse clean without stripping the skin.

Irritation

low

Source

synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Di-TEA-Cocamide Diacetate

DI-TEA-COCAMIDE DIACETATE

3.8

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

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Di-TEA-Palmitoyl Aspartate

DI-TEA-PALMITOYL ASPARTATE

3.5

A mild synthetic surfactant that helps cleanse without stripping the skin, but it's not a standout ingredient on its own.

Irritation

low

Source

synthetic

beautyskincarecleansing
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Surfactant

Dihydroxyethyl Lauramine Oxide

Dihydroxyethyl Lauramine Oxide

4.0

A gentle, coconut-derived surfactant that boosts foam and cleanses without stripping the skin, making it a good choice for sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Dihydroxyethyl Tallowamine Oxide

DIHYDROXYETHYL TALLOWAMINE OXIDE

3.5

An effective foam booster and surfactant, but may cause irritation for sensitive skin and raises ethical concerns due to its animal-derived origin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Disodium 2-Sulfolaurate

DISODIUM 2-SULFOLAURATE

4.3

A gentle, biodegradable surfactant that cleans effectively without stripping the skin barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review