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

Emollient

Isostearyl Neopentanoate

Isostearyl Neopentanoate

4.0

A lightweight synthetic emollient that gives skin a smooth, silky finish without clogging pores, making it a popular choice in non-greasy formulas.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Isostearyl Palmitate

Isostearyl Palmitate

4.0

A lightweight synthetic emollient that softens skin without heavy greasiness, but may clog pores for some people.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Isostearyl PCA

Isostearyl PCA

4.0

A gentle, non-greasy emollient that helps soften and smooth skin while supporting the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emollient

Isostearyl Sebacate

Isostearyl Sebacate

4.0

A gentle, non-greasy emollient that improves product texture and leaves skin feeling soft without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Isotridecyl Acetate

Isotridecyl Acetate

3.8

A lightweight synthetic emollient that helps products spread smoothly without a greasy feel.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Isotridecyl Alcohol

Isotridecyl Alcohol

3.5

A gentle synthetic alcohol that softens skin and helps dissolve other ingredients, but offers no active benefits on its own.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Isotridecyl Laurate

Isotridecyl Laurate

4.0

A lightweight, non-greasy emollient that helps products glide on smoothly and leaves skin feeling soft without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Surfactant

Isotridecyl Phosphate

Isotridecyl Phosphate

4.0

A mild synthetic emulsifier that helps products feel smooth and spread easily, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Emollient

Isotridecyl Salicylate

Isotridecyl Salicylate

4.0

A gentle, non-greasy emollient that helps soften skin and improve product texture without clogging pores.

Irritation

low

Source

synthetic

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Fragrance

Isovaleric Acid

ISOVALERIC ACID

3.5

Isovaleric acid is mainly used for its scent and to adjust product pH, but it can be irritating for sensitive skin at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
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Antioxidant

Italian Cypress Extract

Cupressus Sempervirens Leaf/Stem Extract

3.8

Italian Cypress Extract offers antioxidant and astringent benefits, making it a gentle option for oily or combination skin, but research on its topical efficacy is still emerging.

Irritation

low

Source

natural

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Antifungal Agent

Itraconazole

Itraconazole

3.5

Itraconazole is a prescription-strength antifungal that can treat stubborn fungal skin infections, but it is not a routine cosmetic ingredient and should only be used under medical guidance.

Irritation

moderate

Source

synthetic

beautyskincareantifungal
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Exfoliant

Ivory Nut Powder

PHYTELEPHAS AEQUATORIALIS SEED POWDER

4.0

A gentle, biodegradable natural exfoliant that polishes skin without microplastics, but may feel too coarse for very sensitive skin.

Irritation

low

Source

natural

beautyskincareexfoliant
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Soothing Agent

Ivy Geranium Extract

Pelargonium Peltatum Extract

3.8

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

Irritation

low

Source

natural

beautyskincarebotanical
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Antioxidant

Ivy Gourd Seed Extract

Ipomoea hederacea seed extract

3.8

A gentle antioxidant extract from ivy gourd seeds that may help protect skin from environmental stress, though research is still early.

Irritation

low

Source

natural

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Antioxidant

Ivy Leaf Callus Extract

Ipomoea hederacea callus culture extract

3.8

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

Irritation

low

Source

biotech

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Soothing Agent

Ivy Leaf Water

Hedera Helix (Ivy) Leaf Water

3.8

A mild botanical water that may help calm skin and tighten pores, but research is limited and it's not a powerhouse ingredient.

Irritation

low

Source

natural

beautyskincarebotanical
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Soothing agent

Ivy Leaf/Stem Extract

HEDERA HELIX LEAF/STEM EXTRACT

3.8

A botanical extract with traditional use for soothing and firming, but limited modern research and a moderate risk of skin irritation for sensitive types.

Irritation

moderate

Source

natural

beautyskincarebotanical extract
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Soothing Agent

Ivy Stem Extract

Hedera Helix (Ivy) Stem Extract

3.8

A gentle botanical extract that may help calm skin and fight free radicals, but its benefits are modest and not a cure-all.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Iyo Citrus Fruit Extract

Citrus Iyo Fruit Extract

3.8

A gentle, antioxidant-rich citrus extract that may help brighten skin and protect against environmental stress, though research is still emerging.

Irritation

low

Source

natural

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Antioxidant

Iyo Citrus Peel Extract

Citrus Iyo Peel Extract

4.0

A gentle citrus peel extract that may help brighten skin and fight free radicals, but research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Fragrance

Iyo Citrus Peel Oil

CITRUS IYO PEEL OIL

3.8

A fragrant citrus oil that adds a fresh scent to products but may cause irritation for sensitive skin due to natural aromatic compounds.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Astringent

Iyo Citrus Peel Water

Citrus Iyo Peel Water

3.8

A gentle, water-based citrus extract that may offer mild antioxidant and refreshing benefits, but research is limited.

Irritation

low

Source

natural

beautyskincareastringent
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Antioxidant

Jabara Citrus Juice

CITRUS JABARA JUICE

3.8

A gentle, antioxidant-rich citrus juice that may help brighten skin and fight free radical damage, but research is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Jabara Peel Extract

CITRUS JABARA PEEL EXTRACT

4.0

A gentle, antioxidant-rich citrus extract that may help brighten skin and protect against environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Hair conditioning agent

Jaborandi Leaf Extract

Pilocarpus Pennatifolius Leaf Extract

3.5

Jaborandi leaf extract is a traditional botanical with potential scalp-stimulating benefits, but clinical evidence is limited and it may cause irritation in sensitive individuals.

Irritation

moderate

Source

natural

beautyskincarebotanical extract
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Antioxidant

Jabuticaba Fruit Extract

PLINIA CAULIFLORA FRUIT EXTRACT

4.0

A gentle, antioxidant-rich fruit extract that helps protect skin from environmental stress while offering mild soothing benefits.

Irritation

low

Source

natural

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Antioxidant

Jabuticaba Pulp Extract

MYRCIARIA CAULIFLORA PULP

4.0

A gentle, antioxidant-rich fruit extract that helps protect skin from environmental stress while offering mild soothing benefits.

Irritation

low

Source

natural

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Soothing Agent

Jack Bean Leaf Extract

Canavalia Ensiformis Leaf Extract

3.8

A gentle, plant-based extract that may help calm irritated skin and provide antioxidant support, though research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Antioxidant

Jack Pine Bark Extract

Pinus Banksiana Bark Extract

3.8

A gentle, antioxidant-rich bark extract that may help protect skin from environmental stress, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Jackfruit Seed Extract

Artocarpus Heterophyllus Seed Extract

3.8

A gentle, plant-based antioxidant extract that may help hydrate and protect skin, but research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Jade Plant Leaf Extract

Crassula Argentea Leaf Extract

3.8

A gentle plant extract with antioxidant potential, but research on its specific skin benefits is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Jambolan Fruit Juice

EUGENIA JAMBOS FRUIT JUICE

3.8

A gentle, antioxidant-rich fruit juice that may help soothe and protect skin, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Japanese Alder Bark Extract

Alnus Japonica Bark Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing agent

Japanese Alder Leaf/Stem Water

Alnus Japonica Leaf/Stem Water

3.8

A gentle, water-based botanical extract that may help calm skin and provide antioxidant protection, though research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Antioxidant

Japanese Ampelopsis Root Extract

Ampelopsis Japonica Root Extract

3.8

A gentle botanical extract with antioxidant and soothing potential, but research is still early and benefits are not yet proven in large human studies.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Japanese Angelica Extract

Angelica Japonica Extract

3.8

A gentle botanical extract that may help calm skin and fight free radicals, but research is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Japanese Apricot Fruit Water

Prunus Mume Fruit Water

4.0

A gentle, hydrating base ingredient from Japanese apricot fruit that may offer antioxidant and soothing benefits, but research is limited compared to more studied fruit waters.

Irritation

low

Source

natural

beautyskincarehumectant
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Antioxidant

Japanese Apricot Seed Extract

Prunus Mume Seed Extract

4.0

A gentle, antioxidant-rich extract from Japanese apricot seeds that helps protect skin from environmental stress while supporting a calm, even-toned complexion.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Japanese Ardisia Extract

Ardisia Japonica Branch/Leaf Extract

3.8

A gentle plant extract with antioxidant potential, but research is still early and benefits are not yet proven in human skin.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Japanese Beautyberry Fruit Extract

Callicarpa Japonica Fruit Extract

4.0

A gentle, antioxidant-rich fruit extract that helps protect skin from environmental stress and may support a more even-looking complexion.

Irritation

low

Source

natural

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Antioxidant

Japanese Beech Bark Extract

Fagus Crenata Bark Extract

3.8

A gentle, plant-based antioxidant that may help calm skin and fight environmental stress, though research is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing Agent

Japanese Butterbur Extract

PETASITES JAPONICUS LEAF/STEM EXTRACT

3.8

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

Irritation

low

Source

natural

beautyskincaresoothing agent
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Soothing Agent

Japanese Butterbur Leaf Extract

PETASITES JAPONICUS LEAF EXTRACT

3.8

A gentle botanical extract that may help calm irritated skin and provide antioxidant protection, but research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Antioxidant

Japanese Cedar Bark Extract

Cryptomeria japonica bark extract

3.8

A gentle, antioxidant-rich bark extract that may help calm skin and fight environmental stress, but research is still early.

Irritation

low

Source

natural

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Antioxidant

Japanese Cedar Bark Ferment

Cryptomeria Japonica Bark Ferment Extract

3.8

A gentle, antioxidant-rich bark ferment that may help calm skin and defend against environmental stress, though research is still emerging.

Irritation

low

Source

natural

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Antioxidant

Japanese Cedar Bud Extract

Cryptomeria Japonica Bud Extract

3.8

A gentle, antioxidant-rich plant extract that may help calm skin and fight environmental stress, though research is still early.

Irritation

low

Source

natural

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Antioxidant

Japanese Cedar Callus Extract

Cryptomeria Japonica Callus Culture Extract

3.8

A plant-based antioxidant from Japanese cedar callus cells that may help protect skin from environmental stress, though research is still emerging.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Japanese Cedar Extract

Cryptomeria Japonica Branch/Leaf Extract

3.8

A gentle, antioxidant-rich plant extract that may help calm and protect skin, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Japanese Cedar Leaf Extract

Cryptomeria japonica leaf extract

3.8

A gentle plant extract with antioxidant potential, but research is still early and benefits are not yet proven in human skin.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Japanese Cedar Stem Extract

Cryptomeria japonica stem extract

3.8

A gentle plant extract with antioxidant potential, but research is still early and benefits are not yet proven in human skin.

Irritation

low

Source

natural

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