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 1,342
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

Lauryl PEG-8 Dimethicone

LAURYL PEG-8 DIMETHICONE

4.0

A gentle silicone emulsifier that helps products spread smoothly and feel silky, with a good safety profile for most skin types.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Lecithin

LECITHIN

4.3

Lecithin is a gentle, plant-derived emulsifier that helps blend water and oil in formulas while also providing mild hydration and skin barrier support.

Irritation

low

Source

natural

beautyskincareemulsifier
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Emulsifier

Linseed Oil Polyglyceryl-4 Esters

Linseed Oil Polyglyceryl-4 Esters

4.3

A gentle, plant-based emulsifier that helps blend oil and water in creams and lotions while leaving skin feeling soft.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Lysolecithin

Lysolecithin

4.0

Lysolecithin is a mild emulsifier that helps mix water and oil in skincare, with some skin-softening benefits and a low risk of irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Magnesium Lanolate

Magnesium Lanolate

3.5

Magnesium Lanolate is a gentle emulsifier that helps blend oil and water in creams, but may clog pores for acne-prone skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Maltitol Laurate

Maltitol Laurate

4.0

Maltitol Laurate is a mild, sugar-based emulsifier that helps blend water and oil in skincare products without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emollient

Manketti Oil Polyglyceryl-6 Esters

SCHINZIOPHYTON RAUTANENII KERNEL OIL POLYGLYCERYL-6 ESTERS

4.3

A mild, plant-based emulsifier that helps blend oil and water while leaving skin soft and smooth.

Irritation

low

Source

semi-synthetic

beautyskincareemollientemulsifier
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Emulsifier

Mannitan Laurate

Mannitan Laurate

4.0

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

Irritation

low

Source

semi-synthetic

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Emulsifier

Mannitan Oleate

Mannitan Oleate

4.0

Mannitan Oleate is a gentle, plant-based emulsifier that helps create stable, creamy textures in skincare without common irritation.

Irritation

low

Source

natural

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Emulsifier

Marula Oil Polyglyceryl Esters

Sclerocarya Birrea Seed Oil Polyglyceryl-10 Esters

4.5

A mild, eco-friendly emulsifier that helps blend oil and water in your skincare while adding a touch of marula oil's nourishing properties.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

MEA-Dicetearyl Phosphate

MEA-Dicetearyl Phosphate

4.0

A gentle emulsifier that helps create smooth, stable creams and lotions without common irritation.

Irritation

low

Source

semi-synthetic

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Emulsifier

Methoxy PEG/PPG Dimethicone

METHOXY PEG-11 METHOXY PPG-24 DIMETHICONE

3.8

A silicone emulsifier that helps blend water and oil phases, giving a silky, non-greasy feel with low irritation potential.

Irritation

low

Source

synthetic

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Emulsifier

Methyl Glucose Sesquiisostearate

Methyl Glucose Sesquiisostearate

4.3

A reliable, mild emulsifier that creates stable, lightweight formulas without clogging pores or irritating sensitive skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Methyl Glucose Sesquioleate

Methyl Glucose Sesquioleate

4.0

A mild, plant-derived emulsifier that helps create stable, non-greasy formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Methyl Glucose Sesquistearate

METHYL GLUCOSE SESQUISTEARATE

4.5

A mild, sugar-derived emulsifier that creates stable, non-greasy creams and is well-tolerated by most skin types.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Octyldodeceth-16

Octyldodeceth-16

4.0

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Octyldodeceth-2

OCTYLDODECETH-2

4.0

A gentle, synthetic emulsifier that helps oil and water mix in your skincare products without causing irritation.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Octyldodeceth-30

Octyldodeceth-30

4.0

A mild, effective emulsifier that helps blend water and oil without stripping the skin, making it a solid choice for gentle cleansers and moisturizers.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Octyldodeceth-5

Octyldodeceth-5

4.0

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-10

OLETH-10

4.0

Oleth-10 is a gentle emulsifier that helps mix water and oil, making creams and lotions smooth and stable.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-106

OLETH-106

3.5

Oleth-106 is a synthetic emulsifier that helps blend oil and water in products, but it may not be ideal for very sensitive skin due to potential ethoxylate-related impurities.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-110

OLETH-110

3.8

Oleth-110 is a gentle emulsifier that helps blend water and oil in creams and lotions, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-12

OLETH-12

3.5

Oleth-12 helps mix water and oil in your products, but it may be mildly irritating or pore-clogging for sensitive or acne-prone skin.

Irritation

moderate

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-2

Oleth-2

4.0

Oleth-2 is a gentle emulsifier that helps mix oil and water in creams and lotions, with a low risk of irritation.

Irritation

low

Source

semi-synthetic

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Emulsifier

Oleth-23

Oleth-23

4.0

Oleth-23 is a gentle synthetic emulsifier that helps mix water and oil in your products, but it may be less common in modern 'clean' beauty formulas.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-24

OLETH-24

3.5

Oleth-24 helps mix oil and water in creams and lotions, but may cause mild irritation for sensitive skin types.

Irritation

moderate

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-30

OLETH-30

4.0

Oleth-30 is a gentle emulsifier that helps water and oil mix in your skincare products, but it may be too heavy for very oily skin types.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-35

OLETH-35

3.5

Oleth-35 is a gentle synthetic emulsifier that helps mix oil and water in products, but it may be less common in natural-focused formulations.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-40

OLETH-40

3.5

Oleth-40 is a workhorse emulsifier that helps mix water and oil, but it may cause irritation for sensitive skin at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-44

OLETH-44

3.8

Oleth-44 is a gentle synthetic emulsifier that helps mix water and oil in creams and cleansers, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-45

OLETH-45

3.8

Oleth-45 is a gentle synthetic emulsifier that helps mix water and oil in creams and lotions, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-5

OLETH-5

3.8

Oleth-5 helps mix oil and water in your products, but it can be mildly irritating or pore-clogging for some skin types.

Irritation

moderate

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-7

OLETH-7

3.8

Oleth-7 is a workhorse emulsifier that helps mix water and oil, but it may be slightly irritating or clog pores for some skin types.

Irritation

moderate

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-8

OLETH-8

3.5

Oleth-8 helps mix water and oil in products, but it may be mildly irritating or pore-clogging for some skin types.

Irritation

moderate

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Oleth-9

OLETH-9

4.0

Oleth-9 is a reliable emulsifier that helps create stable, creamy textures, but it may not suit those with very sensitive skin.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

Olive Oil Glycereth-8 Esters

OLIVE OIL GLYCERETH-8 ESTERS

4.0

A mild, olive-derived emulsifier that helps blend water and oil in formulas while leaving skin feeling soft.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Olive Oil PEG-10 Esters

OLIVE OIL PEG-10 ESTERS

4.0

A mild, olive-oil-derived emulsifier that helps blend oil and water in cleansers and creams, with a low risk of irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Olive Oil PEG-6 Esters

OLIVE OIL PEG-6 ESTERS

4.0

A mild, olive-derived emulsifier that helps blend oil and water in cleansers and creams, with low irritation potential.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Olive Oil PEG-7 Esters

OLIVE OIL PEG-7 ESTERS

4.0

A mild, olive-derived emulsifier that helps blend oil and water in cleansers and moisturizers while leaving skin feeling soft.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Olive Oil PEG-8 Esters

OLIVE OIL PEG-8 ESTERS

4.0

A mild, olive-derived emulsifier that helps blend oil and water in your skincare, with low irritation potential.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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