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

Myristoyl Sarcosine

Myristoyl Sarcosine

4.0

A mild, amino-acid-based surfactant that cleans without stripping the skin, making it a great choice for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincarecleansingsurfactant
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Surfactant

Myristyl Alaninate

Myristyl Alaninate

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

beautyskincarecleansing
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Surfactant

Myristyl Betaine

Myristyl Betaine

4.0

A gentle, low-irritation surfactant that helps create a rich lather while being kinder to sensitive skin than traditional sulfates.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Octoxynol-9 Carboxylic Acid

Octoxynol-9 Carboxylic Acid

3.8

A gentle synthetic surfactant that effectively cleanses without the harshness of traditional soaps, making it suitable for sensitive skin.

Irritation

low

Source

synthetic

beautyskincarecleansing
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Surfactant

Oleamide DIPA

OLEAMIDE DIPA

3.5

Oleamide DIPA helps create rich lather in cleansers but may cause irritation for sensitive skin types.

Irritation

moderate

Source

synthetic

beautyskincarecleansing
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Surfactant

Oleamidopropyl Betaine

OLEAMIDOPROPYL BETAINE

4.0

A gentle, foam-boosting surfactant that helps make cleansers feel milder and less stripping.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Olivamide DEA

Olivamide DEA

3.8

A gentle, olive-derived surfactant that helps create rich lather and thicker formulas, but may not suit those avoiding all amide-based ingredients.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Emulsifier

Ozonized PEG-14 Oleate

OZONIZED PEG-14 OLEATE

3.5

A mild emulsifier that helps blend oil and water in cleansers, with added ozonized fatty acids for potential skin-soothing benefits.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Palm Kernelamide MIPA

PALM KERNELAMIDE MIPA

3.5

A mild cleansing ingredient that helps create rich lather, but may not suit those avoiding palm-derived ingredients.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Palmitamidopropyl Betaine

Palmitamidopropyl Betaine

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Palmitoyl Glycine

Palmitoyl Glycine

4.0

Palmitoyl Glycine is a mild, amino-acid-based surfactant that cleanses without stripping the skin, making it a great choice for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

PCA Ethyl Cocoyl Arginate

PCA Ethyl Cocoyl Arginate

4.3

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
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Emulsifier

PEG-10 Tallate

PEG-10 TALLATE

3.5

PEG-10 Tallate is a cleansing and emulsifying ingredient derived from tall oil, but its PEG component and potential impurities raise mild safety considerations for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

PEG-18 Glyceryl Oleate/Cocoate

PEG-18 GLYCERYL OLEATE/COCOATE

3.8

A gentle, non-stripping surfactant that helps cleanse without over-drying, making it a good choice for sensitive or dry skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansingemulsifier
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Surfactant

PEG-2 Stearamide Carboxylic Acid

PEG-2 Stearamide Carboxylic Acid

4.0

A gentle, PEG-modified surfactant that helps create a rich foam while being less stripping than traditional sulfates.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

PEG-20 Cocamide

PEG-20 Cocamide

3.5

A common cleansing agent that helps foam and lift dirt, but may be too stripping for dry or sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
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Emulsifier

PEG-20 Sorbitan Cocoate

PEG-20 Sorbitan Cocoate

4.0

A gentle, PEG-based emulsifier derived from coconut oil that helps blend oil and water in cleansers and creams without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansingemulsifier
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Surfactant

PEG-200 Glyceryl Tallowate

PEG-200 Glyceryl Tallowate

3.8

A gentle cleansing agent derived from tallow that helps remove dirt and oil without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

PEG-30 Glyceryl Soyate

PEG-30 Glyceryl Soyate

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Emulsifier

PEG-40 Glyceryl Cocoate

PEG-40 Glyceryl Cocoate

3.8

A gentle, coconut-derived emulsifier that helps cleansers foam and rinse cleanly without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansingemulsifier
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Emulsifier

PEG-5 Oleate

PEG-5 Oleate

3.5

PEG-5 Oleate helps mix oil and water in cleansers, but may be slightly drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleansing
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Surfactant

PEG-6 Cocamide Phosphate

PEG-6 Cocamide Phosphate

3.5

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

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

PEG-6 Undecylenate

PEG-6 Undecylenate

3.8

A gentle cleansing and odor-fighting ingredient that helps keep products stable and skin fresh, but may not suit ultra-sensitive skin in high concentrations.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Emollient

PEG-8 Tucuma Oil Esters

ASTROCARYUM VULGARE OIL PEG-8 ESTERS

4.0

A gentle, water-friendly emollient that helps cleansers feel moisturizing without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

PEG-80 Castor Oil

PEG-80 Castor Oil

3.5

PEG-80 Castor Oil is a gentle cleansing agent that helps remove dirt and makeup, but it may cause irritation for very sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

PEG-80 Hydrogenated Glyceryl Palmate

PEG-80 Hydrogenated Glyceryl Palmate

3.8

A gentle cleansing agent that helps rinse away dirt and oil without stripping the skin, but it's processed with PEGs, which some people prefer to avoid.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

PEG-80 Sorbitan Laurate

PEG-80 Sorbitan Laurate

4.0

A gentle, water-soluble surfactant that helps cleanse without stripping the skin, making it a popular choice for sensitive-skin formulas.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Emollient

PEG/PPG-6/2 Glyceryl Cocoate

PEG/PPG-6/2 Glyceryl Cocoate

4.0

A gentle, coconut-derived cleansing and softening ingredient that helps products rinse cleanly without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Chelating Agent

Pentasodium Triphosphate

Pentasodium Triphosphate

3.8

Pentasodium Triphosphate is a safe, synthetic helper ingredient that binds hard-water minerals to boost lather and keep cleansers stable.

Irritation

low

Source

synthetic

beautyskincarecleansing
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Emulsifier

Polyglyceryl-2 Lauryl Ether

POLYGLYCERYL-2 LAURYL ETHER

4.3

A gentle, PEG-free emulsifier that helps mix oil and water in cleansers and lotions, with low irritation potential.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Potassium Cocoate

Potassium Cocoate

4.0

A gentle, coconut-derived soap ingredient that effectively cleanses without stripping the skin.

Irritation

low

Source

natural

beautyskincarecleansing
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Surfactant

Potassium Glycol Sulfate

POTASSIUM GLYCOL SULFATE

3.5

A mild synthetic surfactant that helps create a rich lather without stripping the skin's natural moisture barrier.

Irritation

low

Source

synthetic

beautyskincarecleansing
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Surfactant

Potassium Hydroxystearate

POTASSIUM HYDROXYSTEARATE

3.8

An effective cleanser and emulsifier, but may be drying or irritating for sensitive skin in high concentrations.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Potassium Laureth-5 Carboxylate

POTASSIUM LAURETH-5 CARBOXYLATE

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Potassium Laureth-6 Carboxylate

POTASSIUM LAURETH-6 CARBOXYLATE

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Potassium Lauryl Sulfate

POTASSIUM LAURYL SULFATE

3.5

Potassium Lauryl Sulfate is a strong cleanser that can effectively remove dirt and oil but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleansing
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Surfactant

Potassium Myristate

Potassium Myristate

3.8

Potassium Myristate is an effective cleanser that creates rich lather, but it can be drying or irritating for sensitive or dry skin types.

Irritation

moderate

Source

synthetic

beautyskincarecleansing
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Surfactant

Potassium Peanutate

POTASSIUM PEANUTATE

3.5

A natural soap ingredient from peanut oil that cleanses effectively but may be drying or irritating for sensitive skin, and poses a risk for those with peanut allergies.

Irritation

moderate

Source

natural

beautyskincarecleansing
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Surfactant

Potassium Rapeseedate

POTASSIUM RAPESEEDATE

4.0

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

Irritation

low

Source

natural

beautyskincarecleansing
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Surfactant

Potassium Stearoyl Glutamate

Potassium Stearoyl Glutamate

4.5

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

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Potassium Toluenesulfonate

Potassium Toluenesulfonate

3.5

Potassium Toluenesulfonate is a mild synthetic helper that keeps formulas clear and stable, but it offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincarecleansing
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Surfactant

PPG-2 Deceth-40

PPG-2-DECETH-40

3.5

A synthetic emulsifier that helps mix oil and water, but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleansing
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