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 7 of 7
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

Skin conditioning agent

Beta-Alanine

Beta-Alanine

3.8

Beta-Alanine is a gentle amino acid that helps maintain skin hydration and resilience, but it is not a standout active for dramatic anti-aging results.

Irritation

low

Source

natural

beautyskincareamino acid
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Humectant

Dipotassium Aspartate

Dipotassium Aspartate

4.0

Dipotassium Aspartate is a gentle, water-attracting amino acid salt that helps keep skin hydrated and supports a healthy moisture barrier without irritation.

Irritation

low

Source

synthetic

beautyskincarehumectantamino acid
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Skin conditioning agent

GABOB

4-AMINO-3-HYDROXYBUTYRIC ACID

3.5

GABOB is a gentle amino acid derivative that may help calm skin and support the moisture barrier, but research in cosmetics is still limited.

Irritation

low

Source

natural

beautyskincareamino acid
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Humectant

Isoleucine

Isoleucine

4.0

Isoleucine is a gentle amino acid that helps maintain skin hydration and supports the skin's natural repair processes.

Irritation

low

Source

natural

beautyskincarehumectantamino acid
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Skin conditioning agent

Lysine HCl

Lysine HCl

3.8

Lysine HCl is a gentle amino acid that may help support collagen and skin repair, but research in topical skincare is still limited.

Irritation

low

Source

natural

beautyskincareamino acid
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Skin conditioning agent

Norvaline

Norvaline

3.5

Norvaline is a synthetic amino acid that may help support skin firmness and microcirculation, but research is limited and it is not a proven anti-aging ingredient.

Irritation

low

Source

synthetic

beautyskincareamino acid
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Humectant

Phenylalanine

PHENYLALANINE

4.0

A gentle amino acid that helps skin hold onto moisture and supports a healthy barrier, but it's not a standout active on its own.

Irritation

low

Source

natural

beautyskincarehumectantamino acid
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