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

Surfactant

Laureth-6

Laureth-6

3.8

Laureth-6 is a gentle surfactant that helps cleansers foam and rinse cleanly, but it may be too drying for very sensitive or dry skin if used in high concentrations.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Laureth-6 Citrate

Laureth-6 Citrate

4.0

Laureth-6 Citrate is a gentle, citrate-modified surfactant that helps cleanse and emulsify without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Laureth-7

Laureth-7

3.8

Laureth-7 is a mild surfactant and emulsifier that helps products spread and rinse cleanly, but it is not a star active ingredient for skin benefits.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-7 Phosphate

LAURETH-7 PHOSPHATE

3.8

A gentle surfactant that helps cleanse without stripping the skin, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Laureth-7 Tartrate

Laureth-7 Tartrate

3.8

Laureth-7 Tartrate is a gentle surfactant that effectively cleanses without stripping the skin, making it a good choice for sensitive skin types.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-8

Laureth-8

3.5

Laureth-8 is a workhorse emulsifier that helps products spread and rinse clean, but it can be drying or irritating for sensitive skin in high concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-8 Phosphate

Laureth-8 Phosphate

3.5

Laureth-8 Phosphate is a mild, semi-synthetic surfactant that helps cleanse and emulsify without stripping the skin, but it may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-9

Laureth-9

3.5

Laureth-9 is a common cleansing and emulsifying agent, but it can be drying or irritating for sensitive skin at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Lauroyl Proline

Lauroyl Proline

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Lauroyl Silk Amino Acids

Lauroyl Silk Amino Acids

4.0

A mild, conditioning cleanser that helps remove dirt and oil without stripping the skin, making it ideal for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Lauryl Alcohol Diphosphonic Acid

Lauryl Alcohol Diphosphonic Acid

3.5

A mild surfactant and chelating agent that helps cleanse and stabilize formulas, but may cause slight irritation in sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Lauryl Aspartic Acid

Lauryl Aspartic Acid

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

beautyskincaresurfactant
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Surfactant

Lauryl Glucoside

Lauryl Glucoside

4.5

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

Irritation

low

Source

natural

beautyskincaresurfactant
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Surfactant

Lauryl Hydroxyethyl Imidazoline

Lauryl Hydroxyethyl Imidazoline

3.8

A gentle surfactant that helps create a creamy lather and reduces the harshness of stronger cleansers, but is rarely used as a standalone ingredient.

Irritation

low

Source

synthetic

beautyskincarehaircaresurfactant
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Surfactant

Lauryl Methylglucamide

Lauryl Methylglucamide

4.3

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Lauryl Phosphate

Lauryl Phosphate

3.5

An effective cleansing agent that can be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laurylamine Dipropylenediamine

Laurylamine Dipropylenediamine

3.5

An effective cleansing and antistatic agent, but may cause irritation for sensitive skin types, especially at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Lecithinamide DEA

LECITHINAMIDE DEA

3.5

Lecithinamide DEA is a surfactant that helps create rich lather, but it may cause mild irritation for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Linoleamide DEA

LINOLEAMIDE DEA

3.8

Linoleamide DEA is a synthetic foam booster and thickener that can improve the lather of cleansers, but it may cause mild irritation for sensitive skin and has raised some safety concerns due to its DEA content.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Linoleamide MEA

Linoleamide MEA

3.5

A foam booster and thickener for cleansers, but may be mildly irritating and potentially pore-clogging for some skin types.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Linoleamide MIPA

Linoleamide MIPA

3.5

Linoleamide MIPA is a synthetic surfactant that helps create rich foam in cleansers, but it may be slightly drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

pH Adjuster

Lysine Glutamate

Lysine Glutamate

4.0

A mild, amino-acid-based pH adjuster that helps keep cleansers and toners gentle while supporting skin’s natural barrier.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Lysine Lauroyl Methionate

LYSINE LAUROYL METHIONATE

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Emollient

Mango Seed Oil PEG-70 Esters

MANGIFERA INDICA (MANGO) SEED OIL PEG-70 ESTERS

4.0

A gentle, water-friendly emollient that adds slip and softness without greasiness, ideal for rinse-off and leave-on products.

Irritation

low

Source

semi-synthetic

beautyskincareemollientsurfactant
Read ingredient review

Surfactant

MEA PPG-6 Laureth-7 Carboxylate

MEA PPG-6 LAURETH-7 CARBOXYLATE

4.0

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Meroxapol 105

Meroxapol 105

3.5

Meroxapol 105 is a synthetic ingredient that helps mix oil and water in cleansers and lotions, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Meroxapol 108

Meroxapol 108

3.5

A mild synthetic surfactant that helps cleanse and emulsify without stripping the skin, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Meroxapol 171

Meroxapol 171

3.5

A mild synthetic ingredient that helps mix oil and water in cleansers, but offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Meroxapol 172

Meroxapol 172

3.8

Meroxapol 172 is a gentle synthetic emulsifier that helps mix water and oil in cleansers and lotions, with low irritation potential.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Meroxapol 174

Meroxapol 174

3.5

A mild synthetic surfactant that helps blend oil and water in cleansers, generally well-tolerated but not a standout active ingredient.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Meroxapol 178

Meroxapol 178

4.0

A gentle synthetic surfactant that helps cleanse without stripping the skin, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Meroxapol 251

Meroxapol 251

3.5

A mild synthetic surfactant that helps blend oil and water in cleansers, generally well-tolerated but not a standout active ingredient.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Meroxapol 252

MEROXAPOL 252

3.5

Meroxapol 252 is a gentle synthetic surfactant that helps blend oil and water in cleansers, but it offers no direct skin benefit beyond cleansing.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Meroxapol 254

Meroxapol 254

3.5

Meroxapol 254 is a gentle synthetic surfactant that helps cleanse and stabilize formulas, but it's not a star active ingredient.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Meroxapol 255

Meroxapol 255

3.5

A mild synthetic surfactant that helps blend oil and water in cleansers, generally considered gentle and low-irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Meroxapol 258

Meroxapol 258

3.8

A gentle synthetic surfactant that helps blend oil and water in cleansers, with low irritation potential.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Meroxapol 311

Meroxapol 311

3.5

Meroxapol 311 is a gentle synthetic surfactant that helps cleansers foam and rinse cleanly, but it offers no direct skin benefit beyond cleansing.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Meroxapol 312

Meroxapol 312

3.5

Meroxapol 312 is a gentle synthetic surfactant that helps cleansers foam and rinse cleanly, but it offers no direct skin benefit beyond cleansing.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Meroxapol 314

Meroxapol 314

3.5

A gentle synthetic surfactant that helps blend oil and water in cleansers, with low irritation potential.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Methoxy PEG-40

METHOXY PEG-40

3.5

A synthetic emulsifier that helps blend oil and water in cleansers, but may not suit those avoiding PEGs.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

UV Filter

Methoxycinnamidopropyl Hydroxysultaine

Methoxycinnamidopropyl Hydroxysultaine

4.0

A dual-action ingredient that helps sunscreen spread evenly while adding a modest UV boost, but it is not a standalone sun protectant.

Irritation

low

Source

synthetic

beautyskincaresunscreensurfactant
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Surfactant

Methyl Dicocamine

Methyl Dicocamine

3.5

A coconut-derived surfactant that helps cleanse and condition, but may cause mild irritation for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Milkamidopropyl Amine Oxide

Milkamidopropyl Amine Oxide

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Milkamidopropyl Betaine

Milkamidopropyl Betaine

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Minkamide DEA

Minkamide DEA

2.5

Minkamide DEA is a foam booster from mink oil, but it's rarely used today due to ethical concerns and potential irritation.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Minkamidopropyl Betaine

Minkamidopropyl Betaine

2.5

Minkamidopropyl Betaine is an effective mild cleanser, but its animal-derived source and moderate comedogenic risk make it less suitable for sensitive or acne-prone skin.

Irritation

low

Source

natural

beautyskincaresurfactant
Read ingredient review

Surfactant

MIPA-C12-14 Sec-Pareth-3 Acetate

MIPA-C12-14 SEC-PARETH-3 ACETATE

3.5

A mild synthetic surfactant that helps cleanse without stripping, but may cause irritation for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

MIPA-Cocoyl Sarcosinate

MIPA-Cocoyl Sarcosinate

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Myreth-10

MYRETH-10

3.5

Myreth-10 is a gentle cleansing agent that helps products foam and rinse cleanly, but it is synthetic and may be drying for very sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Myreth-3

MYRETH-3

3.8

A gentle cleansing agent that helps products foam and rinse cleanly, with a low risk of irritation for most skin types.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Myreth-5

MYRETH-5

3.8

Myreth-5 is a gentle synthetic cleanser that helps products foam and rinse cleanly, but it may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Myristamide DEA

MYRISTAMIDE DEA

3.5

Myristamide DEA is a synthetic foam booster that can make cleansers feel richer, but it may cause irritation for sensitive skin and has raised some environmental concerns.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Foam Booster

Myristamide DIPA

MYRISTAMIDE DIPA

3.5

Myristamide DIPA is a synthetic foam booster that helps create a rich lather, but it may cause mild irritation for sensitive skin types.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Foam Booster

Myristamide MEA

MYRISTAMIDE MEA

3.8

A mild foam booster that helps cleansers feel richer, but offers no direct skin benefit beyond texture.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Myristamide MIPA

MYRISTAMIDE MIPA

3.5

Myristamide MIPA helps create rich lather in cleansers but may be slightly drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Myristamidopropylamine Oxide

MYRISTAMIDOPROPYLAMINE OXIDE

4.0

A mild, effective surfactant that helps create rich foam and improve product texture without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Myristamine Oxide

Myristamine Oxide

4.0

A gentle surfactant that helps create rich lather and improve product texture without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Myristaminopropionic Acid

MYRISTAMINOPROPIONIC ACID

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review