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

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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Emollient

Argan Oil Isostearyl Esters

Argania Spinosa Kernel Oil Isostearyl Esters

4.0

A lightweight, skin-friendly emollient that hydrates without clogging pores, ideal for sensitive and oily skin types.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emulsifier

Argan Oil PEG-8 Esters

ARGAN OIL PEG-8 ESTERS

4.0

A gentle, water-friendly version of argan oil that helps blend oil and water in formulas while leaving skin feeling soft, not greasy.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Antioxidant

Argan Seedcake Extract

Argania Spinosa Seedcake Extract

4.0

A gentle, antioxidant-rich extract from leftover argan seed material that helps protect and condition skin.

Irritation

low

Source

natural

beautyskincareantioxidant
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Exfoliant

Argan Shell Powder

Argania Spinosa Shell Powder

3.8

A gentle, natural exfoliant that sloughs off dead skin cells without harsh microplastics, but may feel gritty for sensitive skin.

Irritation

low

Source

natural

beautyskincareexfoliant
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Antioxidant

Argan Sprout Cell Extract

Argania Spinosa Sprout Cell Extract

4.0

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

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review

Absorbent

Argilla

Argilla

4.0

Argilla is a natural clay that helps absorb excess oil and impurities from the skin, making it a popular choice for oily and acne-prone skin types.

Irritation

low

Source

natural

beautyskincareabsorbent
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Absorbent

Argilla Extract

Argilla Extract

3.8

A gentle clay extract that helps absorb excess oil and impurities without over-drying, making it a solid choice for oily or combination skin.

Irritation

low

Source

natural

beautyskincareabsorbent
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Humectant

Arginine

ARGININE

4.0

Arginine is a gentle, naturally occurring amino acid that helps attract moisture to the skin and supports a healthy barrier.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Arginine Aspartate

Arginine Aspartate

4.0

A gentle amino acid salt that helps maintain skin hydration and supports a healthy moisture barrier without irritation.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
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Surfactant

Arginine Cocoate

Arginine Cocoate

4.0

A mild, coconut-derived cleansing agent that helps clean skin without stripping its natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Antioxidant

Arginine Ferulate

Arginine Ferulate

4.0

Arginine Ferulate combines an amino acid with a plant-derived antioxidant to help protect skin from environmental stress and calm irritation.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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pH Adjuster

Arginine Glutamate

Arginine Glutamate

4.0

A mild, amino-acid-based pH adjuster that helps keep formulas gentle while offering a touch of hydration.

Irritation

low

Source

semi-synthetic

beautyskincarepH adjuster
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Surfactant

Arginine Hexadecyl Phosphate

Arginine Hexadecyl Phosphate

4.0

A mild, amino-acid-based surfactant that cleanses without stripping the skin, making it a good choice for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
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Surfactant

Arginine Lauraminopropionate

ARGININE LAURAMINOPROPIONATE

4.0

A mild, amino-acid-based surfactant that effectively cleanses while being gentle on sensitive or dry skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

Arginine Lauroyl Glutamate

ARGININE LAUROYL GLUTAMATE

4.5

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

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
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Surfactant

Arginine PEG-4 Cocamide Sulfate

ARGININE PEG-4 COCAMIDE SULFATE

3.8

A gentle, coconut-derived surfactant that cleanses without stripping the skin, making it a good choice for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
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Propellant

Argon

ARGON

1.5

Argon is a safe, inert gas used mainly as a propellant or packaging filler, but it does not actively benefit the skin.

Irritation

low

Source

natural

beautyskincarepropellant
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Skin-conditioning agent

Arisaema Root Extract

Arisaema Consanguineum Root Extract

3.0

Arisaema Root Extract is a traditional botanical with very limited modern cosmetic research; its safety and efficacy are not well-established for skincare.

Irritation

moderate

Source

natural

beautyskincarebotanical extract
Read ingredient review

Antioxidant

Arjuna Bark Oil

TERMINALIA ARJUNA BARK OIL

3.8

A gentle botanical oil with antioxidant potential, but limited research and a moderate chance of clogging pores for some skin types.

Irritation

low

Source

natural

beautyskincarebotanical oil
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Antioxidant

Armeria Alpina Leaf Cell Extract

ARMERIA ALPINA LEAF CELL EXTRACT

3.8

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

Irritation

low

Source

biotech

beautyskincareantioxidant
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Soothing agent

Arnica Flower Extract

ARNICA CHAMISSONIS FLOWER EXTRACT

3.8

Arnica flower extract can help calm redness and soothe skin, but it may cause irritation for sensitive individuals, especially on broken skin.

Irritation

moderate

Source

natural

beautyskincarebotanical
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Soothing agent

Arnica Flower Oil

ARNICA MONTANA FLOWER OIL

3.8

Arnica flower oil can help calm irritated skin, but it must be used in low concentrations and never on broken skin due to potential irritation.

Irritation

moderate

Source

natural

beautyskincaresoothing agent
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Soothing Agent

Arnica Flower Water

ARNICA MONTANA FLOWER WATER

3.8

Arnica flower water is a gentle, natural anti-inflammatory that can help calm redness and soothe irritated skin, but it is not a treatment for wounds or serious skin conditions.

Irritation

low

Source

natural

beautyskincaresoothing
Read ingredient review

Antioxidant

Aronia Berry Extract

Aronia Arbutifolia Fruit Extract

4.0

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Arrabidaea Chica Extract

ARRABIDAEA CHICA LEAF/STEM EXTRACT

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Arrabidaea Chica Leaf Powder

Arrabidaea Chica Leaf Powder

3.8

A gentle Amazonian plant powder with antioxidant potential, but research is limited and it's mostly used for its natural color and traditional reputation.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Absorbent

Arrowroot Extract

Maranta Arundinacea Root Extract

4.0

Arrowroot extract is a gentle, natural starch that helps absorb excess oil and soothe skin, making it a popular alternative to talc in powders and deodorants.

Irritation

low

Source

natural

beautyskincareabsorbent
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Absorbent

Arrowroot Powder

Maranta Arundinacea Root Powder

4.0

A gentle, plant-based powder that soaks up shine and adds a smooth feel without clogging pores.

Irritation

low

Source

natural

beautyskincareabsorbent
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Antioxidant

Artemisia & Wheat Bran Extract

ARTEMISIA PRINCEPS LEAF/TRITICUM VULGARE BRAN EXTRACT

4.0

A gentle, antioxidant-rich botanical blend that may help calm irritation and protect skin from environmental stress.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Artemisia Annua Callus Extract

ARTEMISIA ANNUA CALLUS EXTRACT

4.0

A gentle, antioxidant-rich plant extract that may help calm skin and protect against environmental stress, though more human studies are needed.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Soothing Agent

Artemisia Annua Herb Oil

ARTEMISIA ANNUA HERB OIL

4.0

A gentle, antioxidant-rich oil from sweet wormwood that may help calm skin and fight environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing
Read ingredient review

Antioxidant

Artemisia Annua Meristem Cell Extract

ARTEMISIA ANNUA MERISTEM CELL 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
Read ingredient review

Soothing Agent

Artemisia Callus Extract

Artemisia Princeps Callus Extract

4.0

A gentle, plant-based ingredient that may help calm redness and protect skin from environmental stress, though human studies are still limited.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Antioxidant

Artemisia Capillaris Flower Extract

ARTEMISIA CAPILLARIS FLOWER EXTRACT

4.0

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

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Soothing Agent

Artemisia Capillaris Water

ARTEMISIA CAPILLARIS FLOWER/LEAF/STEM WATER

4.0

A gentle, antioxidant-rich botanical water that helps calm irritation and provides light hydration, ideal for sensitive or reactive skin.

Irritation

low

Source

natural

beautyskincaresoothing
Read ingredient review

Soothing Agent

Artemisia Fukudo Extract

Artemisia Fukudo Extract

4.0

A gentle, plant-based extract that may help calm irritated skin and provide antioxidant protection, though research specific to this species is still limited.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review