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 20,769
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

C12-13 Pareth-9

C12-13 PARETH-9

3.8

A gentle synthetic cleanser that helps remove dirt and oil without stripping the skin, but may cause irritation for very sensitive skin types.

Irritation

moderate

Source

synthetic

beautyskincarecleansing
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Solvent

C12-14 Isoparaffin

C12-14 Isoparaffin

3.8

A gentle, fast-evaporating solvent that helps products spread smoothly without leaving a greasy feel.

Irritation

low

Source

synthetic

beautyskincaresolvent
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Surfactant

C12-14 Pareth-11

C12-14 Pareth-11

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

C12-14 Pareth-12

C12-14 Pareth-12

4.0

A gentle, effective cleansing ingredient that helps products foam and rinse clean without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agentemulsifier
Read ingredient review

Surfactant

C12-14 Pareth-3

C12-14 Pareth-3

4.0

A gentle surfactant that helps cleansers foam and rinse cleanly without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-14 Pareth-5

C12-14 Pareth-5

3.8

A gentle cleansing ingredient that helps products foam and rinse clean without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-14 Pareth-7

C12-14 Pareth-7

3.8

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-14 Pareth-9

C12-14 Pareth-9

3.8

A common synthetic surfactant that effectively cleanses but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

C12-14 Sec-Pareth-12

C12-14 Sec-Pareth-12

3.5

An effective cleansing agent that helps remove dirt and oil, but may be drying for sensitive or very dry skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-14 Sec-Pareth-15

C12-14 SEC-PARETH-15

3.5

A workhorse cleansing ingredient that helps remove dirt and oil, but may be drying or irritating for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-14 Sec-Pareth-20

C12-14 Sec-Pareth-20

3.8

A gentle synthetic emulsifier that helps blend oil and water, but may cause mild irritation for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-14 Sec-Pareth-3

C12-14 SEC-PARETH-3

3.8

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

Irritation

moderate

Source

synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

C12-14 Sec-Pareth-30

C12-14 SEC-PARETH-30

3.5

An effective cleansing agent that can be drying or irritating for sensitive skin, but generally safe in well-formulated products.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-14 Sec-Pareth-40

C12-14 SEC-PARETH-40

3.5

A synthetic emulsifier that helps cleansers foam and rinse clean, but may be drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-14 Sec-Pareth-5

C12-14 SEC-PARETH-5

3.5

A synthetic surfactant that helps cleanse and emulsify, but may be drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-14 Sec-Pareth-50

C12-14 SEC-PARETH-50

3.8

A gentle synthetic surfactant that helps cleanse without stripping the skin, but may not suit ultra-sensitive skin in high concentrations.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-14 Sec-Pareth-7

C12-14 SEC-PARETH-7

3.8

A mild synthetic surfactant that helps cleansers foam and rinse cleanly, but may be slightly drying for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-14 Sec-Pareth-8

C12-14 SEC-PARETH-8

3.8

An effective cleansing agent that helps remove dirt and oil, but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-14 Sec-Pareth-9

C12-14 SEC-PARETH-9

3.5

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

C12-15 Alkyl Benzoate

C12-15 Alkyl Benzoate

4.0

A lightweight, synthetic emollient that makes products feel silky without clogging pores—safe and widely used.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

C12-15 Alkyl Ethylhexanoate

C12-15 Alkyl Ethylhexanoate

4.0

A lightweight, synthetic emollient that softens skin without clogging pores, commonly used to improve product texture and spreadability.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emollient

C12-15 Alkyl Lactate

C12-15 Alkyl Lactate

4.0

A lightweight synthetic emollient that hydrates and softens skin without clogging pores, making it a good choice for oily and combination skin types.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

C12-15 Isoparaffin

C12-15 Isoparaffin

3.8

A lightweight synthetic oil that helps products spread smoothly and leaves skin feeling soft without greasiness.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Surfactant

C12-15 Pareth-10

C12-15 PARETH-10

3.8

A gentle cleansing agent that helps remove dirt and oil without stripping the skin, but may cause irritation for very sensitive skin types.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-15 Pareth-10 Phosphate

C12-15 PARETH-10 PHOSPHATE

3.8

A mild synthetic surfactant that helps cleansers foam and rinse cleanly, but may be slightly drying for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-15 Pareth-11

C12-15 Pareth-11

3.8

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-15 Pareth-12

C12-15 PARETH-12

3.8

A gentle synthetic surfactant that helps cleanse without stripping, but may cause irritation in sensitive skin at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-15 Pareth-12 Carboxylic Acid

C12-15 PARETH-12 CARBOXYLIC ACID

4.0

A gentle synthetic surfactant that helps cleanse without stripping the skin, making it a good choice for sensitive or dry skin types.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

C12-15 Pareth-12 Oleate

C12-15 PARETH-12 OLEATE

4.0

A gentle synthetic emulsifier that helps water and oil mix in your products, making them feel smooth and stable.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

C12-15 Pareth-2

C12-15 Pareth-2

4.0

A gentle, low-irritation cleansing agent that helps blend oil and water, making it a reliable choice for sensitive skin formulations.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-15 Pareth-2 Phosphate

C12-15 PARETH-2 PHOSPHATE

4.0

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-15 Pareth-3

C12-15 Pareth-3

3.8

A common synthetic emulsifier that helps products rinse cleanly, but may be slightly drying or irritating for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-15 Pareth-3 Phosphate

C12-15 Pareth-3 Phosphate

3.5

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-15 Pareth-4

C12-15 Pareth-4

3.5

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-15 Pareth-5

C12-15 PARETH-5

3.5

A synthetic emulsifier that helps cleansers work effectively, but may be drying or irritating for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

C12-15 Pareth-6 Phosphate

C12-15 PARETH-6 PHOSPHATE

3.8

A synthetic emulsifier that helps cleansers foam and rinse clean, but may be drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

C12-15 Pareth-7

C12-15 Pareth-7

3.5

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-15 Pareth-7 Carboxylic Acid

C12-15 PARETH-7 CARBOXYLIC ACID

4.0

A gentle, effective cleansing ingredient that helps remove impurities while being less harsh than traditional sulfates.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

C12-15 Pareth-8 Carboxylic Acid

C12-15 PARETH-8 CARBOXYLIC ACID

4.0

A gentle, semi-synthetic surfactant that effectively cleanses without stripping the skin barrier, making it a good choice for sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

C12-15 Pareth-8 Phosphate

C12-15 PARETH-8 PHOSPHATE

3.8

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-15 Pareth-9

C12-15 PARETH-9

3.8

A common synthetic emulsifier that helps cleansers foam and rinse clean, but may be drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

C12-15 Pareth-9 Phosphate

C12-15 PARETH-9 PHOSPHATE

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

C12-16 Pareth-5

C12-16 PARETH-5

3.8

A gentle, synthetic cleansing ingredient that helps lift dirt and oil without stripping the skin, but may not suit extremely sensitive or compromised skin barriers.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-16 Pareth-6 Phosphate

C12-16 PARETH-6 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
Read ingredient review

Surfactant

C12-16 Pareth-7

C12-16 Pareth-7

4.0

A gentle, effective cleansing ingredient that helps lift dirt and oil without stripping the skin, making it a solid choice for daily cleansers.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

C12-16 Pareth-9

C12-16 PARETH-9

4.0

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

Irritation

moderate

Source

synthetic

beautyskincarecleansing agent
Read ingredient review

Emollient

C12-17 Alkane

C12-17 Alkane

4.5

A gentle, plant-derived emollient that hydrates without heaviness, ideal for sensitive and oily skin types.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

C12-18 Acid Triglyceride

C12-18 Acid Triglyceride

4.2

A gentle, plant-derived emollient that softens skin without clogging pores, ideal for dry or sensitive skin types.

Irritation

low

Source

natural

beautyskincareemollient
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Surfactant

C12-18 Alkyl Glucoside

C12-18 Alkyl Glucoside

4.5

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

Irritation

low

Source

natural

beautyskincarecleanser
Read ingredient review