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

Soothing agent

Artemisia Gmelinii Extract

ARTEMISIA GMELINII 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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Fragrance

Artemisia Gmelinii Leaf Oil

Artemisia Gmelinii Leaf Oil

3.5

A fragrant botanical oil with traditional use for soothing skin, but limited modern research and potential for irritation in sensitive individuals.

Irritation

moderate

Source

natural

beautyskincareessential oil
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Fragrance

Artemisia Montana Flower Oil

ARTEMISIA MONTANA FLOWER OIL

3.8

A fragrant botanical oil with potential soothing benefits, but limited research and a moderate risk of skin irritation for sensitive individuals.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Soothing Agent

Artemisia Montana Leaf Water

ARTEMISIA MONTANA LEAF WATER

4.0

A gentle, hydrating botanical water that may help calm redness and provide antioxidant protection, especially popular in Korean skincare.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Soothing Agent

Artemisia Pallens Extract

ARTEMISIA PALLENS HERB EXTRACT

3.8

A gentle botanical extract with potential soothing and antioxidant benefits, but research on its cosmetic efficacy is still limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Artemisia Pallens Flower Extract

ARTEMISIA PALLENS FLOWER EXTRACT

3.8

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

Irritation

low

Source

natural

beautyskincarebotanical extract
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Fragrance

Artemisia Pallens Flower Oil

ARTEMISIA PALLENS FLOWER OIL

3.8

A fragrant essential oil with a unique scent, but limited research on skincare benefits and a moderate risk of irritation for sensitive skin.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Fragrance

Artemisia Pallens Oil

ARTEMISIA PALLENS HERB OIL

3.8

A fragrant botanical oil that adds a unique scent to products but has limited research on direct skincare benefits and may irritate sensitive skin.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Soothing Agent

Artemisia Princeps Leaf Extract

ARTEMISIA PRINCEPS LEAF EXTRACT

4.3

A gentle, antioxidant-rich botanical extract that helps calm irritated skin and supports a healthy-looking complexion.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Soothing Agent

Artemisia Princeps Leaf Oil

ARTEMISIA PRINCEPS LEAF OIL

4.0

A gentle, aromatic oil from Korean mugwort that may help calm irritated skin and provide antioxidant support.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Soothing agent

Artemisia Umbelliformis Extract

ARTEMISIA UMBELLIFORMIS EXTRACT

4.0

A gentle, antioxidant-rich botanical extract from alpine wormwood that may help calm irritated skin and defend against environmental stress.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Artemisia-Citrus-Pine Leaf Extract

ARTEMISIA ANNUA/CITRUS JUNOS FRUIT/PINUS DENSIFLORA LEAF EXTRACT

4.0

A gentle botanical blend that may help calm skin and defend against environmental stress, though research on the specific combination is limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing agent

Artemisinic Acid

Artemisinic Acid

3.8

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

Irritation

low

Source

natural

beautyskincaresoothing agent
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Antioxidant

Artemisinin

ARTEMISININ

2.5

Artemisinin is a potent plant compound with promising antioxidant and soothing properties, but its use in skincare is still emerging and lacks robust safety and efficacy data for cosmetic applications.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Arthraxon Hispidus Extract

Arthraxon Hispidus Flower/Leaf/Stem Extract

3.5

A gentle plant extract with early research suggesting antioxidant benefits, but human skincare studies are very limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Humectant

Arthrobacter Fermented Hyaluronic Acid

ARTHROBACTER/HYALURONIC ACID FERMENT FILTRATE

4.0

A biotech humectant that helps skin hold onto moisture, with a lower molecular weight for deeper penetration than standard hyaluronic acid.

Irritation

low

Source

biotech

beautyskincarehumectant
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Antioxidant

Artichoke Bud Extract

Cynara Scolymus (Artichoke) Bud Extract

4.0

A gentle, plant-based antioxidant that helps protect skin from environmental stress while offering mild soothing benefits.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Artichoke Leaf and Root Powder

Cynara Scolymus (Artichoke) Leaf/Root Powder

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Artist's Conk Oil

Ganoderma applanatum oil

3.8

A mushroom-derived oil with antioxidant potential, but research on its cosmetic benefits is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Artocarpus Lakoocha Wood Extract

Artocarpus Lakoocha Wood Extract

3.8

A plant-based antioxidant extract that may help brighten skin and fight free radical damage, but research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Arunika Ekisu

Arunika Ekisu

3.5

Arunika Ekisu is a gentle botanical extract with antioxidant potential, but scientific evidence is limited and its exact plant source is unclear.

Irritation

low

Source

natural

beautyskincareantioxidant
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Fragrance

Asafoetida Gum Oil

FERULA ASSAFETIDA GUM OIL

3.5

Asafoetida gum oil may offer antimicrobial benefits, but its strong scent and potential for skin irritation limit its use in mainstream skincare.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Antioxidant

Asafoetida Root Extract

Ferula Assa Foetida Root Extract

3.8

A traditional botanical extract with antioxidant potential, but limited modern skincare research.

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing Agent

Asarum Root Extract

ASARUM HETEROTROPOIDES ROOT EXTRACT

3.5

A gentle botanical extract with antioxidant and soothing potential, but research is limited and it may cause sensitivity in rare cases.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Soothing Agent

Asarum Sieboldii Root Extract

ASARUM SIEBOLDII ROOT EXTRACT

3.8

A gentle botanical root extract with antioxidant and soothing potential, but human skincare research is limited.

Irritation

low

Source

natural

beautyskincarebotanical
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Soothing Agent

Asarum Sieboldii Root Water

ASARUM SIEBOLDII ROOT WATER

3.5

A gentle, water-based botanical extract with potential soothing and antioxidant benefits, but research is limited.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Soothing Agent

Ascophyllum Nodosum Powder

Ascophyllum Nodosum Powder

4.0

A gentle seaweed powder that hydrates, soothes, and provides antioxidant protection, ideal for sensitive or dry skin.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Antioxidant

Ascorbic Acid

Ascorbic Acid

4.5

A well-researched antioxidant that brightens skin and supports collagen, but can be unstable and irritating at high concentrations.

Irritation

moderate

Source

natural

beautyskincareantioxidant
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Antioxidant

Ascorbyl Carbonyl Dipeptide-17

ASCORBYL CARBONYL DIPEPTIDE-17

3.8

A gentle, stabilized vitamin C peptide that may brighten and support collagen, but research is still early.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidanthumectant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidanthumectant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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Soothing Agent

Ash Bark Extract

Fraxinus Excelsior Bark Extract

3.8

A gentle bark extract with antioxidant and soothing potential, though human studies are limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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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

beautyskincareantioxidant
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Humectant

Asian Pear Fruit Juice

Pyrus Bretschneideri Fruit Juice

4.0

Asian pear fruit juice is a gentle, water-like ingredient that adds light hydration and a touch of antioxidant protection, but it's not a powerhouse active.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Asian Pear Juice

Pyrus Pyrifolia Fruit Juice

3.8

Asian pear juice is a gentle, hydrating ingredient that adds a touch of natural antioxidant power to skincare, but its benefits are backed by limited direct research.

Irritation

low

Source

natural

beautyskincarehumectant
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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

beautyskincareantioxidant
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Soothing agent

Asian Yarrow Extract

Achillea Asiatica Flower/Leaf/Stem Extract

3.8

A gentle botanical extract with potential soothing and antioxidant benefits, but research is still emerging.

Irritation

low

Source

natural

beautyskincarebotanical extract
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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

beautyskincareantioxidant
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Soothing agent

Asiaticoside

Asiaticoside

4.3

Asiaticoside is a soothing, skin-repairing compound from Gotu Kola that helps calm irritation and supports a healthy skin barrier.

Irritation

low

Source

natural

beautyskincaresoothing agent
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