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 20,303
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

Aquamarine Extract

Aquamarine Extract

3.5

Aquamarine extract is a trendy mineral-rich ingredient that may offer soothing and hydrating benefits, but scientific evidence is limited.

Irritation

low

Source

natural

beautyskincaresoothing
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Exfoliant

Aquamarine Powder

Aquamarine Powder

3.5

A gentle, natural exfoliant from crushed gemstone, but its benefits beyond physical scrubbing are not well-supported by research.

Irritation

moderate

Source

natural

beautyskincareexfoliant
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Exfoliant

Arabica Coffee Fruit Powder

Coffea Arabica Fruit Powder

4.0

A gentle, antioxidant-rich natural exfoliant from coffee fruit that helps smooth skin without harsh microbeads.

Irritation

low

Source

natural

beautyskincareexfoliant
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Exfoliant

Arabica Coffee Seed Powder

Coffea Arabica Seed Powder

4.0

A gentle, natural physical exfoliant with antioxidant benefits from coffee, but may be too gritty for sensitive skin if not finely ground.

Irritation

low

Source

natural

beautyskincareexfoliant
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Humectant

Arabinose

Arabinose

3.8

A gentle, natural sugar that helps attract moisture to the skin without irritation or clogging pores.

Irritation

low

Source

natural

beautyskincarehumectant
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Skin conditioning agent

Arabinose Ferment Extract

Escherichia Coli/Arabinose Ferment Lysate Filtrate Extract

3.8

A biotech ingredient that may support skin barrier function and soothe irritation, but research is still early and mostly from the manufacturer.

Irritation

low

Source

biotech

beautyskincareactive
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Humectant

Arabinoxylan

ARABINOXYLAN

4.0

A gentle, plant-based humectant that hydrates and soothes, ideal for sensitive or dry skin.

Irritation

low

Source

natural

beautyskincarehumectantfilm-former
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Surfactant

Arachideth-20

ARACHIDETH-20

3.5

Arachideth-20 is a gentle synthetic emulsifier that helps mix oil and water in cleansers and lotions, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Emulsifier

Arachideth-22

ARACHIDETH-22

3.8

A gentle synthetic emulsifier that helps mix oil and water in creams and cleansers, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Arachideth-27

ARACHIDETH-27

3.8

Arachideth-27 is a gentle synthetic emulsifier that helps mix water and oil in cleansers and lotions, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
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Surfactant

Arachideth-32

ARACHIDETH-32

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
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Emulsifier

Arachideth-37

Arachideth-37

3.8

Arachideth-37 is a gentle synthetic emulsifier that helps water and oil mix in your products, but it's not a star ingredient for skin benefits.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Surfactant

Arachideth-42

ARACHIDETH-42

3.5

Arachideth-42 is a synthetic emulsifier that helps mix water and oil, but it may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Emollient

Arachidic Acid

ARACHIDIC ACID

3.8

A gentle, plant-derived fatty acid that helps soften skin and stabilize formulas without common irritation.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Arachidonic Acid

ARACHIDONIC ACID

3.5

Arachidonic acid is a natural omega-6 fatty acid that may support skin barrier function and reduce signs of aging, but it can be irritating for sensitive skin and has limited research in topical use.

Irritation

moderate

Source

natural

beautyskincareemollient
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Emollient

Arachidyl Alcohol

Arachidyl Alcohol

4.0

A gentle fatty alcohol that softens skin and improves product texture without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Arachidyl Behenate

Arachidyl Behenate

4.5

Arachidyl Behenate is a gentle, plant-based wax that makes creams feel silky and helps stabilize formulas without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Arachidyl Erucate

Arachidyl Erucate

4.0

Arachidyl Erucate is a gentle, non-greasy emollient that helps soften and smooth skin without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Surfactant

Arachidyl Glucoside

Arachidyl Glucoside

4.5

A gentle, non-stripping emulsifier that helps create stable, creamy textures without irritating the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Emollient

Arachidyl Glycol

Arachidyl Glycol

4.0

Arachidyl Glycol is a gentle emollient that softens and smooths skin without clogging pores, making it a safe choice for most skin types.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Arachidyl Glycol Isostearate

ARACHIDYL GLYCOL ISOSTEARATE

4.0

A gentle, synthetic emollient that softens skin and improves product feel without common irritation or clogging concerns.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Arachidyl Propionate

ARACHIDYL PROPIONATE

4.0

Arachidyl propionate is a gentle, non-greasy emollient that helps soften and smooth skin without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Antioxidant

Aralia Callus Culture Extract

Aralia Continentalis Callus Culture Extract

4.0

A lab-grown plant extract that may help calm skin and fight free radical damage, though human research is still limited.

Irritation

low

Source

biotech

beautyskincareantioxidantsoothing
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Antioxidant

Aralia Elata Callus Extract

Aralia Elata Callus Extract

4.0

A gentle, plant-derived antioxidant that may help protect skin from environmental stress and support a calmer complexion.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Aralia Elata Extract

Aralia Elata Branch/Leaf Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Aralia Elata Leaf Extract

Aralia Elata Leaf Extract

4.0

A gentle plant extract that may help protect skin from environmental stress and calm irritation, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Aralia Elata Root Extract

Aralia Elata Root Extract

3.8

A gentle, plant-derived extract with antioxidant and soothing potential, though research in cosmetics is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Exfoliant

Araucaria Nut Shell Powder

ARAUCARIA ANGUSTIFOLIA NUT SHELL POWDER

3.5

A gentle, natural exfoliating powder from nut shells, best for physical scrubs but with limited research on its specific benefits.

Irritation

low

Source

natural

beautyskincareexfoliant
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Antioxidant

Araucaria Seed Extract

Araucaria Angustifolia Seed Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Exfoliant

Araucaria Seed Powder

ARAUCARIA ANGUSTIFOLIA SEED POWDER

3.8

A gentle, natural exfoliating powder from the seeds of the Brazilian pine tree, suitable for physical scrubs without harsh microbeads.

Irritation

low

Source

natural

beautyskincareexfoliant
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Antioxidant

Araucaria Seedcoat Extract

ARAUCARIA ANGUSTIFOLIA SEEDCOAT EXTRACT

3.8

A gentle, plant-derived antioxidant that may help protect skin from environmental stress, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Skin brightener

Arbutin

Arbutin

4.3

Arbutin is a gentle, plant-derived brightener that helps fade dark spots without the irritation often associated with stronger alternatives.

Irritation

low

Source

natural

beautyskincarebrightening agent
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Antioxidant

Arbutin-Rich Leaf Extract

Epigaea Repens Leaf Extract

3.8

A gentle plant extract with antioxidant potential, but research on its specific benefits in skincare is very limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Skin brightener

Arbutinyl Undecylenate

Arbutinyl Undecylenate

4.0

A stable, gentle brightener that helps fade dark spots and even skin tone without the irritation risks of pure hydroquinone.

Irritation

low

Source

semi-synthetic

beautyskincarebrightening agent
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Antioxidant

Arctic Callus Culture Extract

CERASTIUM ARCTICUM CALLUS CULTURE EXTRACT

3.8

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

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Arctic Cloudberry Callus Ferment

Saccharomyces/Rubus Arcticus Callus Lysate Ferment Extract Filtrate

4.0

A gentle, antioxidant-rich ferment that may help protect and condition skin, though human studies are limited.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Arctic Cotton Callus Extract

ERIOPHORUM SCHEUCHZERI CALLUS EXTRACT

3.8

A gentle, lab-grown plant extract that may help calm skin and fight free radicals, but human research is still limited.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Arctic Raspberry Callus Extract

RUBUS ARCTICUS CALLUS EXTRACT

4.0

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Arctic Raspberry Fruit Extract

Rubus Arcticus Fruit Extract

4.0

A gentle, antioxidant-rich fruit extract that may help protect skin from environmental stress and soothe irritation.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Arctic Raspberry Fruit Water

Rubus Arcticus Fruit Water

3.8

A gentle, antioxidant-rich fruit water that adds light hydration and a touch of soothing benefits, but its effects are mild compared to more concentrated actives.

Irritation

low

Source

natural

beautyskincarehumectant
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Soothing agent

Arctic Wool Flower Extract

ERIOPHORUM SPISSUM FLOWER/STEM EXTRACT

3.8

A gentle, antioxidant-rich Arctic plant extract that may help calm irritated skin, but research is still early.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Antioxidant

Arctigenin

Arctigenin

3.8

Arctigenin is a plant-based antioxidant that may help calm irritation and protect skin from environmental stress, but human research is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Arctiin

Arctiin

3.8

Arctiin is a gentle plant antioxidant that helps calm skin and defend against environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Arctostaphylos Viscida Leaf Extract

ARCTOSTAPHYLOS VISCIDA LEAF EXTRACT

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Ardisia Crenata Leaf Extract

Ardisia Crenata Leaf Extract

3.5

A gentle botanical extract with antioxidant potential, but research on its skincare benefits is still limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Astringent

Areca & Clove Stem Extract

Areca Catechu Seed/Eugenia Caryophyllus Stem Extract

3.5

A traditional botanical blend with astringent and antimicrobial potential, but limited modern safety data and moderate irritation risk.

Irritation

moderate

Source

natural

beautyskincarebotanical extract
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Astringent

Areca Catechu Shell Extract

ARECA CATECHU SHELL EXTRACT

2.5

Areca catechu shell extract is a traditional botanical with astringent properties, but its use in modern skincare is limited by a lack of safety data and potential for irritation.

Irritation

moderate

Source

natural

beautyskincarebotanical extract
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Antioxidant

Areca Palm Extract

Dypsis Lutescens Extract

3.5

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Arenaria Kansuensis Extract

ARENARIA KANSUENSIS LEAF/ROOT/STEM EXTRACT

3.5

A gentle, antioxidant-rich plant extract with limited but promising research for soothing and protecting skin.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Argan Callus Culture Extract

Argania Spinosa Callus Culture Extract

4.0

A gentle, lab-grown antioxidant extract that may help protect skin from environmental stress, though human studies are still limited.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Argan Callus Extract

Argania Spinosa Callus Extract

4.0

A lab-grown argan extract that delivers antioxidants without the heavy oiliness of traditional argan oil.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Argan Fruit Extract

Argania Spinosa Fruit Extract

4.0

A gentle, antioxidant-rich extract from argan fruit that helps protect skin from environmental stress without clogging pores.

Irritation

low

Source

natural

beautyskincareantioxidant
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Emollient

Argan Fruit Unsaponifiables

Argania Spinosa Fruit Unsaponifiables

4.0

A gentle, lipid-rich fraction of argan fruit that helps soothe and support the skin barrier without the heavy feel of pure oil.

Irritation

low

Source

natural

beautyskincareemollient
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Moisturizer

Argan Kernel Extract

Argania Spinosa Kernel Extract

4.0

A gentle, antioxidant-rich extract that hydrates and protects skin without clogging pores.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Argan Leaf Cell Extract

Argania Spinosa Leaf Cell Extract

3.8

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

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Argan Leaf Extract

Argania Spinosa Leaf Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Emollient

Argan Oil

Argania Spinosa Kernel Oil

4.5

Argan oil is a gentle, non-greasy emollient that hydrates and softens skin without clogging pores, making it a popular choice for all skin types.

Irritation

low

Source

natural

beautyskincareemollient
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Emulsifier

Argan Oil Aminopropanediol Esters

Argania Spinosa Kernel Oil Aminopropanediol Esters

4.0

A gentle, plant-derived emulsifier that helps blend water and oil in formulas while offering light skin conditioning.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emollient

Argan Oil Esters

Argania Spinosa Kernel Oil / Hydrogenated Argania Spinosa Kernel Oil Esters

4.3

A stable, skin-friendly emollient derived from argan oil that moisturizes without feeling greasy.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emollient

Argan Oil Glycereth-8 Esters

Argania Spinosa Kernel Oil Glycereth-8 Esters

4.0

A gentle, semi-synthetic emollient that combines the nourishing properties of argan oil with a lighter, non-greasy feel.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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