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

Honey Cocoates

Honey Cocoates

4.2

A gentle, plant-based emulsifier that helps blend water and oil in creams and lotions while providing light skin conditioning.

Irritation

low

Source

natural

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Emulsifier

Hydrogenated Castor Oil PEG-8 Esters

Hydrogenated Castor Oil PEG-8 Esters

4.0

A gentle, PEG-modified castor oil derivative that helps mix water and oil, making it a reliable emulsifier for stable, non-greasy formulas.

Irritation

low

Source

semi-synthetic

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Emulsifier

Hydrogenated Dimer Dilinoleth-80

Hydrogenated Dimer Dilinoleth-80

4.2

A gentle, plant-derived emulsifier that helps oil and water mix, making creams and lotions smooth and stable without irritation.

Irritation

low

Source

semi-synthetic

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Emulsifier

Hydrogenated Laneth-20

Hydrogenated Laneth-20

3.8

A gentle, lanolin-derived emulsifier that helps blend water and oil in formulas, with a low risk of irritation for most skin types.

Irritation

low

Source

semi-synthetic

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Emulsifier

Hydrogenated Laneth-25

Hydrogenated Laneth-25

3.8

A gentle, lanolin-derived emulsifier that helps mix oil and water in skincare, with low irritation risk but potential allergy concerns for those sensitive to lanolin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Hydrogenated Lysolecithin

Hydrogenated Lysolecithin

4.0

A gentle emulsifier that helps mix oil and water in formulas and may support skin barrier function without irritation.

Irritation

low

Source

semi-synthetic

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Emulsifier

Hydrogenated Soy Polyglycerides

Hydrogenated Soy Polyglycerides / Soyamide DEA

3.8

A gentle soy-derived emulsifier that helps blend oil and water in products, but its DEA component raises minor safety questions in high concentrations.

Irritation

low

Source

semi-synthetic

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Emulsifier

Hydrogenated Tallow Amide

Hydrogenated Tallow Amide

3.5

A thickener and stabilizer from hydrogenated tallow, effective but may be too heavy for oily or acne-prone skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Hydrogenated Talloweth-12

Hydrogenated Talloweth-12

3.5

An effective emulsifier that helps mix water and oils, but may be too heavy or potentially irritating for sensitive or acne-prone skin.

Irritation

moderate

Source

semi-synthetic

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Emulsifier

Hydroxyceteth-60

Hydroxyceteth-60

3.8

A gentle synthetic emulsifier that helps oil and water mix, making creams and lotions smooth and stable.

Irritation

low

Source

synthetic

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Emulsifier

Hydroxylated Lecithin

Hydroxylated Lecithin

4.3

A gentle, modified lecithin that helps blend water and oil in formulas while supporting skin barrier function.

Irritation

low

Source

semi-synthetic

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Skin Conditioning Agent

Hydroxypropyl Bispalmitamide MEA

Hydroxypropyl Bispalmitamide MEA

4.0

A gentle synthetic ingredient that helps condition skin and stabilize formulas, with a low risk of irritation.

Irritation

low

Source

synthetic

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Emulsifier

Hydroxystearic Acid

Hydroxystearic Acid

4.0

A gentle, plant-derived fatty acid that helps stabilize formulas and gives a smooth, non-greasy feel.

Irritation

low

Source

semi-synthetic

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Emulsifier

Isoceteth-10

ISOCETETH-10

4.0

Isoceteth-10 is a gentle synthetic emulsifier that helps mix oil and water in skincare, with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

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Emulsifier

Isoceteth-10 Stearate

ISOCETETH-10 STEARATE

3.8

Isoceteth-10 Stearate is a gentle synthetic emulsifier that helps water and oil mix in your creams and lotions, with a low risk of irritation.

Irritation

low

Source

synthetic

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Emulsifier

Isoceteth-15

Isoceteth-15

3.5

A reliable emulsifier that helps mix oil and water in creams and lotions, generally well-tolerated but may be less suitable for very sensitive skin.

Irritation

low

Source

synthetic

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Emulsifier

Isoceteth-7

Isoceteth-7

3.8

Isoceteth-7 is a gentle synthetic emulsifier that helps mix oil and water in your skincare products, but it may not be ideal for those avoiding ethoxylated ingredients.

Irritation

low

Source

synthetic

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Emulsifier

Isoceteth-8 Stearate

ISOCETEARETH-8 STEARATE

3.8

A reliable synthetic emulsifier that helps create stable, creamy textures in skincare, but offers no direct skin benefit.

Irritation

low

Source

synthetic

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Emulsifier

Isopropanolamine Lanolate

Isopropanolamine Lanolate

3.5

A gentle lanolin-based emulsifier that helps blend oil and water, but may be mildly comedogenic for acne-prone skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Isostearamidomorpholine Stearate

Isostearamidomorpholine Stearate

3.5

A synthetic emulsifier that helps blend oil and water in creams and lotions, generally considered safe and low-irritation for most skin types.

Irritation

low

Source

synthetic

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Emulsifier

Isosteareth-10 Stearate

ISOSTEARETH-10 STEARATE

4.0

A gentle synthetic emulsifier that helps create stable, creamy textures in skincare without common irritation.

Irritation

low

Source

synthetic

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Emulsifier

Isosteareth-2

ISOSTEARETH-2

4.0

A gentle emulsifier that helps water and oil mix, making creams and lotions smooth and stable.

Irritation

low

Source

semi-synthetic

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Emulsifier

Isosteareth-200 Linoleate

ISOSTEARETH-200 LINOLEATE

4.0

A gentle emulsifier that helps oil and water mix, making creams and cleansers feel smooth without heavy residue.

Irritation

low

Source

semi-synthetic

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Emulsifier

Isosteareth-200 Palmitate

ISOSTEARETH-200 PALMITATE

3.8

A reliable synthetic emulsifier that helps blend oil and water in skincare formulas, generally well-tolerated but not a star active ingredient.

Irritation

low

Source

synthetic

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Emulsifier

Isosteareth-22

ISOSTEARETH-22

4.0

Isosteareth-22 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

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Emulsifier

Isostearyl Diglyceryl Succinate

Isostearyl Diglyceryl Succinate

4.3

A mild, effective emulsifier that creates stable, silky formulas without stripping the skin — ideal for sensitive and dry skin types.

Irritation

low

Source

semi-synthetic

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Emulsifier

Isostearyl Glucoside

Isostearyl Glucoside

4.5

A mild, sugar-based emulsifier that helps create stable, creamy textures without irritating the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Jojoba Oil PEG-150 Esters

JOJOBA OIL PEG-150 ESTERS

4.0

A gentle, PEG-modified jojoba oil that helps blend water and oil in cleansers and creams without stripping the skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Jojoba Oil PEG-8 Esters

JOJOBA OIL PEG-8 ESTERS

4.0

A gentle, water-soluble jojoba derivative that helps blend oil and water in formulas while adding light skin conditioning.

Irritation

low

Source

semi-synthetic

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Emulsifier

Laneth-10

LANETH-10

3.5

Laneth-10 is a gentle emulsifier that helps blend water and oil, but may be comedogenic for acne-prone skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Laneth-15

LANETH-15

3.5

Laneth-15 is a gentle emulsifier derived from lanolin, but it may be comedogenic for acne-prone skin and is not suitable for those with lanolin allergies.

Irritation

low

Source

semi-synthetic

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Emulsifier

Laneth-16

Laneth-16

3.8

Laneth-16 helps blend oil and water in products, but may be slightly pore-clogging for acne-prone skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Laneth-20

Laneth-20

3.8

Laneth-20 is a gentle, water-friendly emulsifier derived from lanolin, ideal for blending oils and water in creams and cleansers, but those with lanolin allergies should avoid it.

Irritation

low

Source

semi-synthetic

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Emulsifier

Laneth-25

Laneth-25

3.8

Laneth-25 is a gentle, water-soluble lanolin derivative that helps blend oil and water in formulas, but may not suit those with lanolin allergies.

Irritation

low

Source

semi-synthetic

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Emulsifier

Laneth-40

LANETH-40

3.8

Laneth-40 is a gentle, water-friendly emulsifier derived from lanolin that helps blend oils and water in creams and cleansers, but may not suit those with lanolin allergies.

Irritation

low

Source

semi-synthetic

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Emulsifier

Laneth-50

Laneth-50

3.5

Laneth-50 is a gentle emulsifier that helps blend oil and water in creams and lotions, but it may not suit those with lanolin allergies.

Irritation

low

Source

semi-synthetic

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Emulsifier

Laneth-60

LANETH-60

3.8

A gentle emulsifier derived from lanolin that helps blend oil and water in formulas, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

semi-synthetic

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Emulsifier

Laneth-9 Acetate

LANETH-9 ACETATE

3.8

A gentle, lanolin-derived emulsifier that helps blend water and oil in creams and lotions, with a low risk of irritation.

Irritation

low

Source

semi-synthetic

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Emollient

Lanolin Oil Ethoxylate

PPG-40-PEG-60 Lanolin Oil

3.8

A gentle, modified lanolin oil that moisturizes and helps blend water and oil in formulas, but may not suit those with wool allergies.

Irritation

low

Source

semi-synthetic

beautyskincareemollientemulsifier
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Emulsifier

Laureth

Laureth

3.5

Laureth ingredients help blend oil and water in formulas, but some types can be mildly drying or irritating for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansingemulsifier
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Skin Conditioning Agent

Lauryl Malamide

Lauryl Malamide

3.5

A gentle synthetic ingredient that helps condition skin and stabilize formulas, but research on its long-term effects is limited.

Irritation

low

Source

synthetic

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Emulsifier

Lauryl Methicone Copolyol

Lauryl Methicone Copolyol

4.0

A gentle silicone emulsifier that helps create smooth, stable formulas without heavy or greasy feel.

Irritation

low

Source

synthetic

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