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 4,092
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

Ascorbyl Carboxydecyl Trisiloxane

Ascorbyl Carboxydecyl Trisiloxane

4.0

A gentle, silicone-bound vitamin C that offers antioxidant protection and brightening benefits with less sting than pure ascorbic acid.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ascorbyl Dipalmitate

ASCORBYL DIPALMITATE

3.8

A gentler, more stable cousin of pure vitamin C that offers antioxidant benefits with less irritation, but may be less potent for brightening.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ascorbyl Glucoside

Ascorbyl Glucoside

4.3

A gentle, stable form of vitamin C that brightens skin and fights free radicals without the irritation of pure L-ascorbic acid.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ascorbyl Hyaluronate

Ascorbyl Hyaluronate

4.3

A gentle, stable vitamin C derivative that also delivers hyaluronic acid's moisture-binding power, ideal for brightening and hydrating without irritation.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ascorbyl Isostearate

Ascorbyl Isostearate

4.0

A gentle, stable vitamin C derivative that brightens skin and fights free radicals without the irritation of pure L-ascorbic acid.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ascorbyl Lactoside

Ascorbyl Lactoside

4.0

A gentle, stabilized vitamin C derivative that brightens skin and fights free radicals with less sting than pure L-ascorbic acid.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ascorbyl Linoleate

ASCORBYL LINOLEATE

3.8

A gentle, oil-soluble vitamin C derivative that offers antioxidant protection and may support skin brightening, though it is less studied than ascorbic acid.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ascorbyl Methoxycinnamate

Ascorbyl Methoxycinnamate

3.8

A gentle, oil-soluble vitamin C derivative that may offer antioxidant and mild UV protection, but research is still early compared to L-ascorbic acid.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ascorbyl Methylsilanol Pectinate

ASCORBYL METHYLSILANOL PECTINATE

4.0

A gentle, stabilized vitamin C derivative that offers antioxidant protection and brightening benefits with less irritation than pure ascorbic acid.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ascorbyl Nicotinate

ASCORBYL NICOTINATE

3.8

A stable, oil-friendly vitamin C derivative that may offer antioxidant and brightening benefits with less irritation than pure L-ascorbic acid, though research is still emerging.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ascorbyl Palmitate

Ascorbyl Palmitate

4.0

A stable, oil-soluble vitamin C derivative that offers antioxidant protection and brightening benefits with less irritation than pure L-ascorbic acid.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ascorbyl Propyl Hyaluronate

ASCORBYL PROPYL HYALURONATE

4.3

A gentle, stable vitamin C derivative fused with hyaluronic acid that brightens and hydrates without the sting of pure L-ascorbic acid.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ascorbyl Retinoate

ASCORBYL RETINOATE

4.0

A gentle hybrid of vitamin C and retinol that aims to brighten and smooth skin with less irritation than traditional retinol.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidantanti-aging
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Antioxidant

Ascorbyl Stearate

ASCORBYL STEARATE

4.0

A gentle, oil-soluble vitamin C that brightens skin and fights free radicals without the sting of pure L-ascorbic acid.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ascorbyl Tetraisopalmitate

ASCORBYL TETRAISOPALMITATE

4.3

A gentle, stable vitamin C that brightens skin and fights free radicals without the sting or short shelf life of pure L-ascorbic acid.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ascorbyl Tocopheryl Maleate

ASCORBYL TOCOPHERYL MALEATE

4.0

A stable, dual-antioxidant ingredient that pairs vitamins C and E in one molecule for gentle environmental protection.

Irritation

low

Source

semi-synthetic

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Antioxidant

Ash Bud Extract

FRAXINUS EXCELSIOR BUD EXTRACT

3.8

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

Irritation

low

Source

natural

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Antioxidant

Ash Leaf Extract

Fraxinus Rhynchophylla Leaf Extract

3.8

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

Irritation

low

Source

natural

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Antioxidant

Ash Wood Extract

Fraxinus Excelsior Wood 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

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Antioxidant

Ashwagandha Flower Extract

Withania Somnifera Flower Extract

3.8

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

Irritation

low

Source

natural

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Antioxidant

Asian Pear Callus Extract

Pyrus Serotina Callus Extract

4.0

A gentle, antioxidant-rich extract from Asian pear callus cells that may help soothe skin and protect against environmental stress, though research is still emerging.

Irritation

low

Source

natural

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Antioxidant

Asian Pear Fruit Extract

Pyrus Pyrifolia Fruit Extract

4.0

A gentle, antioxidant-rich fruit extract that helps soothe and protect the skin from environmental stress.

Irritation

low

Source

natural

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Antioxidant

Asian Pear Peel Extract

Pyrus Pyrifolia Peel Extract

4.0

A gentle, antioxidant-rich extract from Asian pear peels that may help calm skin and protect against environmental stress.

Irritation

low

Source

natural

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Antioxidant

Asiatic Acid

Asiatic Acid

4.3

Asiatic acid is a gentle, plant-derived antioxidant that helps calm skin and support collagen, but it's not a quick-fix for deep wrinkles.

Irritation

low

Source

natural

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Antioxidant

Asparagus Lucidus Extract

Asparagus Lucidus Extract

3.8

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

Irritation

low

Source

natural

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Antioxidant

Asparagus Meristem Cell Culture

Asparagus Officinalis Meristem Cell Culture Conditioned Media

3.8

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

Irritation

low

Source

biotech

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Antioxidant

Asparagus Meristem Cell Extract

Asparagus Officinalis Meristem Cell Extract

3.8

A gentle plant stem cell extract that may help protect skin from environmental stress, though research is still early.

Irritation

low

Source

natural

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Antioxidant

Asparagus Root Extract

Asparagus Officinalis Root Extract

3.8

Asparagus Root Extract offers mild antioxidant and soothing benefits, but research is limited and it's not a standout ingredient.

Irritation

low

Source

natural

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Antioxidant

Asparagus Stem Extract

Asparagus Officinalis Stem Extract

3.8

Asparagus Stem Extract is a gentle, antioxidant-rich plant extract that may help soothe skin and fight free radical damage, though research is still emerging.

Irritation

low

Source

natural

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Antioxidant

Aspen Flower Extract

Populus Tremuloides Flower 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

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Antioxidant

Aspergillus/Soybean Germ Ferment Filtrate

ASPERGILLUS/SOYBEAN GERM FERMENT FILTRATE

4.0

A fermented soybean germ filtrate that offers antioxidant benefits and supports skin barrier function, generally well-tolerated and suitable for most skin types.

Irritation

low

Source

biotech

beautyskincareantioxidantskin conditioning
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Antioxidant

Astaxanthin

Astaxanthin

4.5

A standout antioxidant that helps defend skin against UV damage and signs of aging, with a growing body of research behind it.

Irritation

low

Source

natural

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Antioxidant

Aster Glehnii Extract

Aster Glehnii Extract

3.8

A gentle plant 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

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Antioxidant

Asteriscus Graveolens Extract

ASTERISCUS GRAVEOLENS FLOWER/FRUIT/LEAF/STEM EXTRACT

3.8

A gentle botanical extract with antioxidant potential, but research is limited and benefits are not yet well-established in human skin.

Irritation

low

Source

natural

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Antioxidant

Astragalus Callus Extract

Astragalus Membranaceus Callus Extract

3.8

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

Irritation

low

Source

natural

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Antioxidant

Astragalus Leaf Extract

Astragalus Membranaceus Leaf Extract

3.8

A gentle botanical extract that may help calm skin and defend against environmental stress, though human studies are limited.

Irritation

low

Source

natural

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Antioxidant

Astragalus Root Ferment

SACCHAROMYCES/ASTRAGALUS MEMBRANACEUS ROOT FERMENT EXTRACT

3.8

A fermented botanical extract with potential antioxidant and soothing properties, but human skin research is still limited.

Irritation

low

Source

biotech

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Antioxidant

Astragalus Seed Extract

Astragalus Sinicus Seed Extract

3.8

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

Irritation

low

Source

natural

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Antioxidant

Astragalus Sinicus Extract

ASTRAGALUS SINICUS EXTRACT

3.8

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

Irritation

low

Source

natural

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Antioxidant

Astragalus Sprout Extract

Astragalus Membranaceus Sprout Extract

3.8

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

Irritation

low

Source

natural

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Antioxidant

Atemoya Fruit Extract

ANNONA ATEMOYA FRUIT EXTRACT

3.8

A gentle, antioxidant-rich fruit extract that may help soothe skin and fight free radicals, but research is still early.

Irritation

low

Source

natural

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Antioxidant

Atemoya Peel Extract

Annona Atemoya Peel Extract

3.8

A gentle, plant-derived antioxidant extract that may help calm skin and fight free radical damage, though research is still early.

Irritation

low

Source

natural

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Antioxidant

Atlas Cedar Bark Extract

CEDRUS ATLANTICA BARK EXTRACT

3.8

Atlas Cedar Bark Extract is a gentle antioxidant that may help calm skin and protect against environmental stress, though research is still emerging.

Irritation

low

Source

natural

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Antioxidant

Atlas Cedar Callus Extract

CEDRUS ATLANTICA CALLUS EXTRACT

3.8

A gentle antioxidant extract from Atlas cedar callus cells that may help protect skin from environmental stress, though research is still early.

Irritation

low

Source

natural

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Antioxidant

Atlas Cedar Leaf Extract

Cedrus Atlantica Leaf Extract

3.8

Atlas Cedar Leaf Extract is a gentle botanical antioxidant that may help protect skin from environmental stress, but research on its specific cosmetic benefits is still emerging.

Irritation

low

Source

natural

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Antioxidant

Atractylis Root Extract

ATRACTYLIS LYRATA ROOT EXTRACT

3.8

A gentle plant root extract with antioxidant potential, best for calming sensitive or stressed skin.

Irritation

low

Source

natural

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Antioxidant

Atractylodes Rhizome Extract

Atractylodes Chinensis Rhizome Extract

3.8

A gentle herbal extract with antioxidant and soothing potential, but research is limited compared to more established ingredients.

Irritation

low

Source

natural

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Antioxidant

Atriplex Halimus Callus Extract

ATRIPLEX HALIMUS CALLUS EXTRACT

4.0

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

Irritation

low

Source

biotech

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Antioxidant

Aucoumea Klaineana Resin Extract

Aucoumea Klaineana Resin Extract

3.8

A gentle, plant-derived resin extract that may help calm skin and fight free radical damage, though research is still emerging.

Irritation

low

Source

natural

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Antioxidant

Australian Finger Lime Extract

Citrus Australasica Fruit Extract

4.0

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

Irritation

low

Source

natural

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Antioxidant

Avenanthramides

Avena Sativa (Oat) Kernel Extract

4.5

Avenanthramides are gentle oat compounds that soothe irritation and fight free radicals, making them ideal for sensitive or reactive skin.

Irritation

low

Source

natural

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Antioxidant

Avocado Callus Powder

Persea Gratissima Callus Powder

4.0

A gentle, lab-grown avocado ingredient that may help protect skin from environmental stress and support a calmer complexion.

Irritation

low

Source

biotech

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Antioxidant

Avocado Fruit Extract

Persea Gratissima Fruit Extract

4.2

Avocado fruit extract is a gentle, antioxidant-rich ingredient that helps hydrate and soothe skin, but its benefits are best supported by general knowledge of avocado oil rather than specific clinical studies on the extract itself.

Irritation

low

Source

natural

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Antioxidant

Avocado Leaf Extract

Persea Gratissima Leaf Extract

4.0

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

Irritation

low

Source

natural

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