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 577
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

10-Hydroxydecanoic Acid

10-HYDROXYDECANOIC ACID

4.0

A gentle, naturally derived fatty acid that helps calm and condition the skin, with emerging research supporting its soothing benefits.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Soothing Agent

Abelmoschus Manihot Root Extract

Abelmoschus Manihot Root 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

beautyskincaresoothing agent
Read ingredient review

Soothing agent

Acetyl Methyl Oleanolate

Acetyl Methyl Oleanolate

4.0

A gentle, plant-derived compound that helps calm redness and supports the skin's natural repair process.

Irritation

low

Source

semi-synthetic

beautyskincaresoothing agent
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Soothing Agent

Agave Leaf Extract

Agave Tequilana Leaf Extract

3.8

Agave leaf extract is a gentle, plant-based ingredient that may help soothe and hydrate the skin, but research on its cosmetic benefits is still limited.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Agave Rigida Extract

Agave Rigida Extract

4.0

Agave Rigida Extract is a gentle, plant-derived ingredient that helps soothe and hydrate the skin, making it a good choice for sensitive or irritated skin types.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Soothing agent

Agave Yeast Ferment Extract

METSCHNIKOWIA AGAVES EXTRACT

3.8

A gentle, biotech-derived ingredient that may help calm skin and support a healthy microbiome, but research is still early.

Irritation

low

Source

biotech

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Aldioxa

ALDIOXA

3.5

Aldioxa is a gentle, soothing ingredient that helps calm irritated skin and reduce minor redness, but it is not a powerhouse active.

Irritation

low

Source

semi-synthetic

beautyskincaresoothing agent
Read ingredient review

Soothing agent

Algae Extract

Alsidium Helminthocorton Extract

3.8

A gentle red algae extract that may help calm and hydrate the skin, though research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Allantoin

Allantoin

4.5

A gentle, plant-derived soother that helps calm irritated skin and supports a healthy-looking complexion.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Soothing Agent

Allantoin Calcium Pantothenate

Allantoin Calcium Pantothenate

4.3

A gentle, dual-action ingredient that calms irritation and supports skin repair, ideal for sensitive or stressed skin.

Irritation

low

Source

semi-synthetic

beautyskincaresoothing agent
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Soothing Agent

Allantoin Galacturonic Acid

Allantoin Galacturonic Acid

4.0

A gentle, dual-action ingredient that soothes irritation and helps skin hold onto moisture, ideal for sensitive or compromised skin.

Irritation

low

Source

semi-synthetic

beautyskincaresoothing agent
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Soothing Agent

Allantoin Glycyrrhetinate

ALLANTOIN GLYCYRRHETINIC ACID

4.3

A gentle, dual-action ingredient that soothes irritation and supports skin repair without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincaresoothing agent
Read ingredient review

Soothing agent

Allantoin PABA

Allantoin PABA

3.5

Allantoin PABA combines soothing allantoin with PABA, a former sunscreen ingredient, but PABA is rarely used today due to safety concerns and allergy risks.

Irritation

low

Source

semi-synthetic

beautyskincaresoothing agent
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Soothing Agent

Allantoin Panthenol

Allantoin, Panthenol

4.5

A gentle, well-tolerated combination that soothes irritation and supports moisture retention, ideal for sensitive or compromised skin.

Irritation

low

Source

semi-synthetic

beautyskincaresoothing agenthumectant
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Soothing Agent

Aloe Ferment Filtrate

LACTOBACILLUS/ALOE BARBADENSIS FERMENT FILTRATE

4.0

A gentle, probiotic-fermented aloe ingredient that soothes and conditions skin without irritation.

Irritation

low

Source

biotech

beautyskincaresoothing agent
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Soothing Agent

Aloe Ferox Leaf Juice Extract

Aloe Ferox Leaf Juice Extract

4.0

A soothing, hydrating botanical extract with antioxidant benefits, generally safe and well-tolerated for most skin types.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Soothing Agent

Aloe Ferox Leaf Juice Powder

Aloe Ferox Leaf Juice Powder

4.0

A gentle, plant-derived powder that helps calm and hydrate skin, but is less studied than its cousin Aloe barbadensis (common aloe vera).

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Aloe Maculata Leaf Extract

Aloe Maculata Leaf Extract

3.8

Aloe Maculata Leaf Extract is a gentle, soothing botanical that helps calm irritated skin and provides light hydration, but it is less researched than classic Aloe vera.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Aloe Resin Extract

Aloe Species Resin

3.8

Aloe resin is a natural, soothing ingredient that may help calm irritated skin, but research on its specific benefits is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Soothing Agent

Aloe Vera Leaf Juice Powder

Aloe Barbadensis Leaf Juice Powder

4.5

A gentle, water-soluble powder that soothes and hydrates skin, ideal for sensitive or irritated complexions.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing agent

Aloe Vera Leaf Powder

Aloe Barbadensis Leaf Powder

4.0

A gentle, plant-based powder that soothes and hydrates skin, but its benefits depend heavily on processing and formulation.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Fragrance

Alpha-Santalol

ALPHA-SANTALOL

4.0

Alpha-santalol is the primary fragrant component of sandalwood oil, offering a subtle woody scent and potential soothing benefits, but it must be used at low concentrations to minimize the risk of skin irritation.

Irritation

low

Source

natural

beautyskincarefragrancesoothing agent
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Soothing Agent

Alpinia Uraiensis Stalk/Leaf Water

ALPINIA URAIENSIS STALK/LEAF WATER

3.8

A gentle, plant-derived hydrosol that may help calm skin and provide mild antioxidant benefits, but research is limited.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing agent

Ammonium Glycyrrhizate

AMMONIUM GLYCYRRHIZATE

4.3

A gentle, licorice-derived ingredient that helps calm irritated skin and reduce redness without harsh side effects.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Antioxidant

Amur Cork Tree Bark Ferment

Saccharomyces/Phellodendron Amurense Bark Ferment Extract

4.0

A fermented botanical extract that soothes and protects skin with antioxidants, ideal for sensitive or stressed skin.

Irritation

low

Source

biotech

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Amur Jack-in-the-Pulpit Extract

Arisaema Amurense Extract

3.5

A traditional plant extract with potential soothing benefits, but research is limited and it's not a mainstream ingredient.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Androsace Helvetica Extract

Androsace Helvetica Extract

3.8

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

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing agent

Angelica Root Ferment Extract

SACCHAROMYCES/ANGELICA DAHURICA ROOT FERMENT EXTRACT

3.8

A fermented botanical extract that may offer soothing and conditioning benefits, but research is still emerging.

Irritation

low

Source

biotech

beautyskincaresoothing agent
Read ingredient review

Soothing agent

Annual Feverfew Oil

TANACETUM ANNUUM FLOWER/LEAF/STEM OIL

4.0

Annual feverfew oil is a gentle, plant-based oil that helps calm redness and irritation, making it a good choice for sensitive skin.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Annual Tanacetum Flower Oil

TANACETUM ANNUUM FLOWER OIL

3.8

A gentle, fragrant oil from the feverfew family that may help calm skin and fight free radicals, but research is still early.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

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
Read ingredient review

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
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

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

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
Read ingredient review

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
Read ingredient review

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
Read ingredient review

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
Read ingredient review

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
Read ingredient review

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
Read ingredient review

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
Read ingredient review

Soothing Agent

Asparagopsis Armata Extract

Asparagopsis Armata Extract

3.8

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

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Skin Conditioning Agent

Aspergillus Ferment Filtrate

ASPERGILLUS/FERMENT FILTRATE

4.0

A gentle, fermented ingredient that helps calm and condition the skin, especially beneficial for sensitive or irritated complexions.

Irritation

low

Source

biotech

beautyskincaresoothing agent
Read ingredient review

Soothing agent

Aspergillus Molasses Ferment Filtrate

ASPERGILLUS/MOLASSES FERMENT FILTRATE

3.8

A gentle, fermented ingredient that may help calm skin and support hydration, though research on its benefits is still emerging.

Irritation

low

Source

biotech

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Aster Ageratoides Extract

Aster Ageratoides 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

beautyskincaresoothing agent
Read ingredient review

Soothing agent

Astragalus Ferment Filtrate

LACTOBACILLUS/ASTRAGALUS MEMBRANACEUS ROOT EXTRACT FERMENT FILTRATE

3.8

A gentle fermented botanical that may help calm skin and support a healthy barrier, but research is still early.

Irritation

low

Source

biotech

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Astragalus Root Extract

Astragalus Gummifer Root Extract

3.8

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

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Atractylodes Japonica Root Oil

ATRACTYLODES JAPONICA ROOT OIL

3.8

A gentle herbal oil with traditional roots, offering soothing and antioxidant benefits, though modern research is still limited.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Awkeotsang Fig Extract

Ficus Awkeotsang Fruit Extract

3.8

A gentle, plant-based extract that may help calm and hydrate skin, though research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Azelamide MEA

Azelamide MEA

4.0

Azelamide MEA is a milder, less irritating cousin of azelaic acid that helps calm redness and support a clearer complexion without the typical itch or sting.

Irritation

low

Source

semi-synthetic

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Azulene

AZULENE

4.0

Azulene is a gentle, blue-hued ingredient that helps calm redness and irritation, making it a favorite for sensitive skin.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Soothing Agent

Babassu Mesocarp Extract

Orbignya Speciosa Mesocarp Extract

4.0

A gentle, plant-based extract that helps calm irritation and provides antioxidant protection, ideal for sensitive or reactive skin.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing agent

Baby's Tears Extract

Soleirolia soleirolii extract

3.8

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

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing agent

Baccharis Oil

Baccharis Dracunculifolia Herb Oil

3.8

Baccharis Oil is a gentle, plant-based oil with antioxidant and soothing potential, but research is still early and it may cause irritation in sensitive skin.

Irritation

moderate

Source

natural

beautyskincaresoothing agent
Read ingredient review

Skin conditioning agent

Bacillus Corn Ferment Filtrate

BACILLUS/CORN SEED FERMENT FILTRATE

4.0

A gentle, fermented ingredient that may help calm skin and support a healthy skin barrier, but research is still emerging.

Irritation

low

Source

biotech

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Bacillus Rice Bran Honey Ferment

Bacillus/Rice Bran/Honey Ferment

4.0

A gentle fermented ingredient that may help calm skin and provide antioxidant benefits, though research is still emerging.

Irritation

low

Source

biotech

beautyskincaresoothing agent
Read ingredient review