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

Potassium Cocoyl PCA

Potassium Cocoyl PCA

4.3

A gentle, coconut-derived cleanser that cleans without stripping and even adds a touch of moisture.

Irritation

low

Source

semi-synthetic

beautyskincarecleanserhumectant
Read ingredient review

Surfactant

Potassium Cocoyl Proline

Potassium Cocoyl Proline

4.5

A mild, coconut-derived cleanser that effectively removes dirt and oil while respecting the skin’s natural barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

Potassium Cocoyl Sarcosinate

Potassium Cocoyl Sarcosinate

4.3

A gentle, coconut-derived surfactant that cleanses effectively while being kinder to sensitive skin than traditional sulfates.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

Potassium Cocoyl Taurate

Potassium Cocoyl Taurate

4.5

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

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

Potassium Cornate

POTASSIUM CORNATE

3.8

A gentle, plant-derived cleansing agent that effectively removes dirt and oil without stripping the skin.

Irritation

low

Source

natural

beautyskincaresurfactant
Read ingredient review

Surfactant

Potassium Cumenesulfonate

POTASSIUM CUMENESULFONATE

4.0

Potassium Cumenesulfonate is a mild synthetic surfactant that helps keep formulas clear and stable, but it can be slightly drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Potassium Cyclocarboxypropyloleate

POTASSIUM CYCLOCARBOXYPROPYLOLEATE

3.5

An effective synthetic cleanser that can be drying for some skin types, but is generally safe when used in rinse-off products.

Irritation

moderate

Source

synthetic

beautyskincarecleansing agent
Read ingredient review

Chelating Agent

Potassium EDTMP

Potassium EDTMP

3.5

A synthetic chelator that helps preserve formula stability and efficacy by trapping trace metals, but offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincarechelating agent
Read ingredient review

Preservative

Potassium Ethylparaben

POTASSIUM ETHYLPARABEN

3.5

A paraben preservative that is effective against microbes but has raised some safety concerns in certain consumer circles.

Irritation

low

Source

synthetic

beautyskincarepreservative
Read ingredient review

Oral care agent

Potassium Fluorosilicate

Potassium Fluorosilicate

2.0

Potassium fluorosilicate is a fluoride salt used in oral care for cavity prevention, but it is toxic if ingested in large amounts and requires careful formulation.

Irritation

moderate

Source

synthetic

beautyoral carecosmetic
Read ingredient review

Antioxidant

Potassium Fructoborate

POTASSIUM FRUCTOBORATE

3.8

A gentle, boron-based antioxidant that may help calm skin and support collagen, but research is still early.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Chelating Agent

Potassium Glucoheptonate

POTASSIUM GLUCOHEPTONATE

4.0

A mild chelating agent that helps your products stay stable and effective without the irritation sometimes linked to stronger alternatives.

Irritation

low

Source

synthetic

beautyskincarechelating agent
Read ingredient review

Humectant

Potassium Gluconate

Potassium Gluconate

4.0

Potassium Gluconate is a mild humectant and chelator that helps keep your products stable and your skin hydrated without irritation.

Irritation

low

Source

synthetic

beautyskincarehumectantchelating agent
Read ingredient review

Antioxidant

Potassium Glutathione Isomerized Linoleate

Potassium Glutathione Isomerized Linoleate

3.8

A novel hybrid ingredient that pairs glutathione's brightening power with a skin-friendly fatty acid, but research on this specific form is still limited.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Buffering Agent

Potassium Glycerophosphate

Potassium Glycerophosphate

4.0

A gentle pH-balancing salt that helps keep your skin's acid mantle happy without stinging or irritation.

Irritation

low

Source

synthetic

beautyskincarebuffering agent
Read ingredient review

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
Read ingredient review

Soothing Agent

Potassium Glycyrrhetinate

Potassium Glycyrrhetinate

4.3

A gentle, licorice-derived ingredient that helps calm redness and irritation without clogging pores.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Potassium Glycyrrhizinate

POTASSIUM GLYCYRRHIZINATE

4.5

A gentle, plant-derived soother that helps calm redness and irritation without clogging pores.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Surfactant

Potassium Hempseedate

POTASSIUM HEMPSEEDATE

4.0

A gentle, plant-derived cleanser that effectively removes dirt and oil without stripping the skin.

Irritation

low

Source

natural

beautyskincarecleanser
Read ingredient review

pH Adjuster

Potassium Hydroxide

Potassium Hydroxide

3.5

Potassium hydroxide is a powerful pH adjuster that helps create effective cleansers, but it must be carefully neutralized to avoid skin irritation.

Irritation

high

Source

synthetic

beautyskincareph adjuster
Read ingredient review

Exfoliant

Potassium Hydroxycitrate

Potassium Hydroxycitrate

3.8

A gentle exfoliating salt that may help brighten skin and improve texture with a lower irritation risk than stronger acids.

Irritation

low

Source

semi-synthetic

beautyskincareexfoliant
Read ingredient review

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
Read ingredient review

Preservative booster

Potassium Iodide

POTASSIUM IODIDE

3.0

Potassium iodide is a safe preservative helper in tiny amounts, but it is not a skin-beneficial active and may be unnecessary in well-formulated products.

Irritation

low

Source

synthetic

beautyskincarepreservative
Read ingredient review

Surfactant

Potassium Isostearate

Potassium Isostearate

3.8

A gentle cleansing agent that helps remove dirt and oil without stripping the skin, but offers no direct skincare benefits.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Potassium Jojobate

Potassium Jojobate

4.0

A mild, plant-derived cleanser that effectively removes oil-based impurities while being gentle on the skin.

Irritation

low

Source

natural

beautyskincarecleansing agent
Read ingredient review

Humectant

Potassium Lactate

Potassium Lactate

4.3

Potassium lactate is a mild, effective humectant that helps hydrate skin without the sting often associated with pure lactic acid.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
Read ingredient review

Surfactant

Potassium Lanolate

POTASSIUM LANOLATE

4.0

A gentle, lanolin-derived cleansing agent that effectively removes dirt and oil without stripping the skin, but may be comedogenic for some.

Irritation

low

Source

natural

beautyskincarecleansing agent
Read ingredient review

Surfactant

Potassium Laurate

POTASSIUM LAURATE

3.8

An effective but potentially drying cleanser best suited for oily skin types and rinse-off formulas.

Irritation

moderate

Source

synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

Potassium Laureth-3 Carboxylate

POTASSIUM LAURETH-3 CARBOXYLATE

4.0

A gentle, non-stripping surfactant that effectively cleanses while being kinder to sensitive skin than many traditional sulfates.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agent
Read ingredient review

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
Read ingredient review

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
Read ingredient review

Surfactant

Potassium Lauroyl Glycinate

Potassium Lauroyl Glycinate

4.5

A gentle, amino-acid-based cleanser that effectively removes dirt and oil while respecting the skin barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review