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 23 of 20,303
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

Soothing agent

Zinc Pyridoxal 5-Phosphate

Zinc Pyridoxal 5-Phosphate

4.0

A gentle, multitasking ingredient that combines vitamin B6 and zinc to help calm skin and balance oil production.

Irritation

low

Source

semi-synthetic

beautyskincaresoothing agent
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Antimicrobial

Zinc Pyrithione

Zinc Pyrithione

4.2

Zinc pyrithione is a well-studied antimicrobial that helps control dandruff and scalp flaking, but it may cause mild irritation for sensitive skin.

Irritation

low

Source

synthetic

beautyskincareantimicrobial
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Anti-Aging Agent

Zinc Retinoate Hydroxide

ZINC RETINOATE HYDROXIDE

4.0

A gentler retinoid that aims to give you the anti-aging perks of retinoic acid with less redness and peeling.

Irritation

low

Source

semi-synthetic

beautyskincareactive
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Odor Absorbent

Zinc Ricinoleate

Zinc Ricinoleate

4.0

Zinc Ricinoleate is a gentle, effective odor absorber that traps odor molecules without blocking sweat glands, making it a popular alternative to aluminum-based deodorants.

Irritation

low

Source

semi-synthetic

beautyskincaredeodorant
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Film Former

Zinc Rosinate

ZINC ROSINATE

3.5

Zinc Rosinate is a safe, non-irritating film former that helps makeup and hair products stay put without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincarecosmetic
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Antimicrobial

Zinc Salicylate

Zinc Salicylate

3.5

Zinc Salicylate combines zinc's soothing properties with salicylic acid's exfoliating action, but it can be irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincareantimicrobial
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Absorbent

Zinc Silicate

Zinc Silicate

3.5

Zinc Silicate is a safe, non-irritating mineral powder that helps absorb oil and gives a smooth finish, but it offers no active skincare benefits.

Irritation

low

Source

natural

beautyskincaretexturizer
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Thickener

Zinc Stearate

ZINC STEARATE

3.8

Zinc Stearate is a safe, widely used thickener and binder in powders, but may be moderately comedogenic for acne-prone skin.

Irritation

low

Source

synthetic

beautyskincarecosmetic ingredient
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Remineralizing agent

Zinc Strontium Hydroxyapatite

Zinc/Strontium Fluoride Hydroxyapatite

3.8

A mineral compound that helps strengthen enamel and reduce sensitivity, but its cosmetic skincare benefits are less established.

Irritation

low

Source

synthetic

beautyoral careskincare
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Astringent

Zinc Sulfate

ZINC SULFATE

3.8

Zinc sulfate is a gentle astringent that can help calm skin and reduce excess oil, but it's not a primary treatment for acne or inflammation.

Irritation

low

Source

synthetic

beautyskincareastringent
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Opacifying Agent

Zinc Sulfide

ZINC SULFIDE

3.0

Zinc sulfide is a safe, low-irritation mineral pigment used to add opacity or a slight white tint to cosmetics, but it offers no skincare benefits.

Irritation

low

Source

synthetic

beautyskincarecolorant
Read ingredient review

Antimicrobial

Zinc Thiosalicylate

Zinc Thiosalicylate

3.5

Zinc Thiosalicylate is a synthetic zinc compound that may help control dandruff and surface bacteria, but research is limited and it can be irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincareantimicrobial
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Antifungal agent

Zinc Undecylenate

Zinc Undecylenate

4.0

A gentle antifungal ingredient that helps manage yeast and bacteria on skin, often used in deodorants and foot care.

Irritation

low

Source

synthetic

beautyskincareantifungal
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Antioxidant

Zingerone

ZINGERONE

3.8

Zingerone is a ginger-derived antioxidant that may help calm skin and fight free radical damage, though research in cosmetics is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Zinnia Callus Culture Extract

ZINNIA ELEGANS CALLUS CULTURE EXTRACT

3.8

A gentle, lab-grown plant extract that may help protect skin from environmental stress, but research is still early.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Opacifying Agent

Zirconium Dioxide

Zirconium Dioxide

3.0

Zirconium dioxide is a safe but uncommon mineral powder used mainly for opacity and texture; it is not a sunscreen active and offers no UV protection.

Irritation

low

Source

synthetic

beautyskincareopacifier
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Antioxidant

Ziyu Glycoside I

Ziyu Glycoside I

3.5

A plant compound with early research suggesting antioxidant and anti-inflammatory benefits, but human skincare studies are limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Ziyu Glycoside II

Ziyu Glycoside II

3.5

A plant compound with early research suggesting antioxidant and soothing benefits, but more human studies are needed to confirm its effectiveness in skincare.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Ziyu Glycoside III

Ziyu Glycoside III

3.5

Ziyu Glycoside III is a plant compound with early evidence of antioxidant and anti-inflammatory benefits, but research in cosmetic formulations is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Skin conditioning

Zygosaccharomyces Ferment

Zygosaccharomyces microellipsoides ferment

3.8

A gentle yeast ferment that may help balance the skin microbiome and strengthen the skin barrier, though research is still early.

Irritation

low

Source

biotech

beautyskincaremicrobiome
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Soothing Agent

Zymomonas Ferment Extract

Zymomonas Ferment Extract

4.0

A gentle, fermented ingredient that may help calm skin and fight free radicals, but research is still early.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Humectant

Zymomonas Ferment Filtrate

Zymomonas Ferment Filtrate

4.0

A gentle, biotech-derived ferment that helps hydrate and calm the skin, with early research suggesting antioxidant benefits.

Irritation

low

Source

biotech

beautyskincarehumectant
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