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

Sodium Myristoyl Hydrolyzed Collagen

Sodium Myristoyl Hydrolyzed Collagen

4.0

A gentle, 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

beautyskincarecleansersurfactant
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Surfactant

Sodium Naphthalenesulfonate

SODIUM NAPHTHALENESULFONATE

3.0

A synthetic surfactant that helps products foam and rinse cleanly, but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Sodium Naphthol Sulfonate

SODIUM NAPHTHOL SULFONATE

3.5

A synthetic surfactant that helps cleanse the skin but may cause mild irritation in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Sodium Oleanolate

Sodium Oleanolate

4.0

A gentle, plant-based cleanser that effectively removes impurities without stripping the skin, making it a good choice for sensitive skin.

Irritation

low

Source

natural

beautyskincaresurfactant
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Surfactant

Sodium Oleth-7 Phosphate

Sodium Oleth-7 Phosphate

3.8

A gentle surfactant that helps cleanse without stripping the skin, but is not a star active ingredient on its own.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Sodium Oleth-8 Phosphate

Sodium Oleth-8 Phosphate

3.8

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Sodium Palmamphoacetate

Sodium Palmamphoacetate

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Sodium Palmitoyl Hydrolyzed Wheat Protein

SODIUM PALMITOYL HYDROLYZED WHEAT PROTEIN

4.0

A mild, protein-based surfactant that cleanses gently and leaves hair and skin feeling soft, making it a good choice for sensitive or dry types.

Irritation

low

Source

semi-synthetic

beautyskincarehaircaresurfactant
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Chelating Agent

Sodium PEG-4 PEI-6 Phosphonate

SODIUM PEG-4 PEI-6 PHOSPHONATE

3.8

A behind-the-scenes helper that protects your products from metal contamination and improves rinse-off feel, but not a direct skin benefit ingredient.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Sodium PEG-8 Cocamide Carboxylate

SODIUM PEG-8 COCAMIDE CARBOXYLATE

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Sodium PEG-8 Phosphate

SODIUM PEG-8 PHOSPHATE

3.5

A mild synthetic surfactant that helps cleansers foam and rinse cleanly, but may be too stripping for very dry or sensitive skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Sodium Perfluorohexyl Ethylphosphonate

SODIUM PERFLUOROHEXYL ETHYLPHOSPHONATE

3.5

A synthetic surfactant that helps products spread smoothly and resist water, but its fluorinated chemistry raises environmental persistence concerns.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Sodium Ricinoleate

Sodium Ricinoleate

3.8

Sodium Ricinoleate is a gentle, plant-derived cleanser that effectively removes dirt and oil without stripping the skin, but may cause mild irritation for sensitive types.

Irritation

moderate

Source

natural

beautyskincaresurfactant
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Surfactant

Sodium Stearoyl Hydrolyzed Wheat Protein

Sodium Stearoyl Hydrolyzed Wheat Protein

4.0

A mild, protein-based surfactant that cleanses gently and leaves hair and skin feeling soft, making it a good choice for sensitive or dry skin.

Irritation

low

Source

semi-synthetic

beautyskincarehaircaresurfactant
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Surfactant

Sodium Stearyl Phthalamate

Sodium Stearyl Phthalamate

3.8

A gentle synthetic emulsifier that helps cleanse without stripping the skin, but may not suit those avoiding phthalate-related compounds.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Sodium Surfactin

Sodium Surfactin

4.0

A gentle, biodegradable surfactant that cleanses without stripping the skin, making it ideal for sensitive formulas.

Irritation

low

Source

biotech

beautyskincaresurfactant
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Surfactant

Sodium Xylenesulfonate

SODIUM XYLENESULFONATE

3.5

A synthetic helper that improves product feel and mixing, but can be drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Sorbeth-2 Hexalaurate

SORBETH-2 HEXALAURATE

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Emulsifier

Sorbeth-2 Hexaoleate

SORBETH-2 HEXAOLEATE

3.5

Sorbeth-2 Hexaoleate is a safe, effective emulsifier that helps mix oil and water in cleansers and creams, but it offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Sorbeth-20

SORBETH-20

4.0

Sorbeth-20 is a gentle, water-soluble surfactant that helps cleanse without stripping the skin, making it a good choice for sensitive skin formulations.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Sorbeth-222 Hexa(Aminoethyl Ether)

SORBETH-222 HEXA(AMINOETHYL ETHER)

3.5

A synthetic surfactant that helps cleanse and condition skin and hair, but may cause mild irritation in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Emulsifier

Sorbeth-30 Tetraoleate Laurate

SORBETH-30 TETRAOLEATE LAURATE

3.8

A gentle synthetic emulsifier that helps mix oil and water in cleansers and creams, generally well-tolerated but not a star active ingredient.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Sorbeth-40

SORBETH-40

4.0

Sorbeth-40 is a gentle synthetic emulsifier that helps blend oil and water in cleansers and lotions, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Sorbeth-6

SORBETH-6

3.8

Sorbeth-6 is a gentle, synthetic ingredient that helps products clean and mix without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Sorbeth-6 Laurate

SORBETH-6 LAURATE

4.0

A gentle emulsifier that helps mix oil and water, making cleansers and creams feel smooth without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Soyamide DEA

SOYAMIDE DEA

3.5

Soyamide DEA helps create rich lather and thick texture in cleansers, but it may cause mild irritation for sensitive skin and has raised some safety concerns due to potential contamination with DEA-related impurities.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Soyamidopropyl Betaine

SOYAMIDOPROPYL BETAINE

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Soyamine

Soyamine

3.5

Soyamine is a plant-derived emulsifier that helps mix oil and water, but it may be moderately irritating for sensitive skin.

Irritation

moderate

Source

natural

beautyskincaresurfactant
Read ingredient review

Surfactant

Stearamide DEA

Stearamide DEA

3.5

An effective foam booster and thickener, but may cause irritation or clog pores in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Foam Booster

Stearamide MEA

STEARAMIDE MEA

3.5

A synthetic foam booster that helps cleansers feel richer and thicker, but offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Viscosity Increasing Agent

Stearamide MIPA

Stearamide MIPA

3.5

Stearamide MIPA helps thicken and stabilize cleansers, but may be mildly irritating or clog pores for some skin types.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Stearamidoethyl Diethanolamine

STEARAMIDOETHYL DIETHANOLAMINE

3.5

A synthetic foam booster that can improve lather and thickness but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Stearamidoethyl Ethanolamine

Stearamidoethyl Ethanolamine

3.5

A mild surfactant and foam booster that helps cleansers feel richer, but may be slightly pore-clogging for acne-prone skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Stearamidopropyl Betaine

STEARAMIDOPROPYL BETAINE

4.0

A gentle, foam-boosting surfactant that helps cleansers feel creamy and less stripping, but may not suit ultra-sensitive scalps in high concentrations.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Stearamidopropylamine Oxide

Stearamidopropylamine Oxide

3.8

A gentle surfactant that boosts foam and thickens formulas, but may cause mild dryness in sensitive skin with frequent use.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Stearamine Oxide

Stearamine Oxide

3.8

A gentle surfactant that helps create rich foam and thicken formulas, with low irritation potential.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Emulsifier

Steareth-2 Phosphate

Steareth-2 Phosphate

3.8

A gentle synthetic emulsifier that helps create stable, creamy formulas without common irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Thickener

Steareth-200

STEARETH-200

3.5

A synthetic thickener and emulsifier that helps stabilize formulas but may feel heavy on oily skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Emulsifier

Steareth-25

Steareth-25

3.8

Steareth-25 is a gentle synthetic emulsifier that helps keep creams and lotions stable, but it may be less eco-friendly due to its ethoxylated nature.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Emulsifier

Steareth-27

STEARETH-27

4.0

Steareth-27 is a mild, non-irritating emulsifier that helps create stable, creamy textures in skincare and haircare products.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Steareth-3 Phosphate

Steareth-3 Phosphate

4.0

A mild synthetic emulsifier that helps create stable, creamy formulas without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Emulsifier

Steareth-6

Steareth-6

3.8

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Emulsifier

Steareth-80

STEARETH-80

3.8

Steareth-80 is a gentle synthetic emulsifier that helps blend oil and water in products, but its ethoxylation process may raise mild purity concerns for some users.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Stearoamphoacetic Acid

Stearoamphoacetic Acid

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Stearoyl Glutamic Acid

Stearoyl Glutamic Acid

4.3

A mild, amino-acid-based cleanser that effectively removes dirt and oil while respecting your skin's natural barrier.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Stearoyl Leucine

Stearoyl Leucine

4.3

A mild, amino-acid-based surfactant that cleanses effectively while respecting the skin barrier, making it a great choice for sensitive or dry skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Stearoyl Sarcosine

Stearoyl Sarcosine

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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Surfactant

Stearyl Acetyl Glutaminate

Stearyl Acetyl Glutaminate

4.2

A mild, amino-acid-derived surfactant that cleanses without stripping the skin barrier, ideal for sensitive or dry skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Sunfloweramide MEA

SUNFLOWERAMIDE MEA

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review