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

Exfoliant

Clostridium Histolyticum Collagenase

Clostridium Histolyticum Collagenase

3.0

A potent enzyme that dissolves collagen, used sparingly in skincare for deep exfoliation, but requires caution due to its strength.

Irritation

moderate

Source

biotech

beautyskincareexfoliant
Read ingredient review

Antimicrobial

Clotrimazole

Clotrimazole

3.5

Clotrimazole is a proven antifungal ingredient used in medicated products, not a routine cosmetic ingredient for healthy skin.

Irritation

moderate

Source

synthetic

beautyskincareantifungal
Read ingredient review

Antioxidant

Cloudberry Callus Extract

RUBUS CHAMAEMORUS CALLUS

4.0

A gentle, antioxidant-rich plant stem cell extract that may help protect skin from environmental stress, though human studies are limited.

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review

Antioxidant

Cloudberry Fruit Extract

RUBUS CHAMAEMORUS FRUIT JUICE EXTRACT

4.0

Cloudberry fruit extract is a gentle, antioxidant-rich ingredient that helps protect skin from environmental stress and may support a more even complexion.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Cloudberry Juice

RUBUS CHAMAEMORUS FRUIT JUICE

4.0

Cloudberry juice is a gentle, antioxidant-rich fruit extract that helps protect skin from environmental stress and provides light hydration.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Cloudberry Seed Extract

RUBUS CHAMAEMORUS SEED EXTRACT

4.0

Cloudberry Seed Extract is a gentle, antioxidant-rich ingredient that helps protect skin from environmental stress while providing light hydration and soothing benefits.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Emollient

Cloudberry Seed Oil

RUBUS CHAMAEMORUS SEED OIL

4.3

Cloudberry seed oil is a lightweight, antioxidant-rich oil that helps nourish and protect the skin without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Antioxidant

Clove Bark Extract

EUGENIA CARYOPHYLLUS BARK EXTRACT

3.8

Clove bark extract offers antioxidant benefits but can be irritating for sensitive skin at high concentrations.

Irritation

moderate

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Clove Basil Oil

Ocimum gratissimum herb oil

3.8

Clove Basil Oil adds a fresh, herbal scent and may help fight acne-causing bacteria, but it can be irritating for sensitive skin.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Exfoliant

Clove Bud Powder

EUGENIA CARYOPHYLLUS FLOWER BUD POWDER

3.5

Clove bud powder offers gentle physical exfoliation and a warm, spicy scent, but can be irritating for sensitive skin due to its eugenol content.

Irritation

moderate

Source

natural

beautyskincareexfoliant
Read ingredient review

Fragrance

Clove Bud Water

EUGENIA CARYOPHYLLUS BUD WATER

3.8

Clove Bud Water adds a warm, spicy scent to products and may offer mild antioxidant benefits, but its fragrance can be irritating for sensitive skin.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Antioxidant

Clove Extract

EUGENIA CARYOPHYLLUS EXTRACT

3.5

Clove extract offers antioxidant benefits but can be irritating for sensitive skin due to its high eugenol content.

Irritation

moderate

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Clove Flower Oil

EUGENIA CARYOPHYLLUS FLOWER OIL

3.5

Clove Flower Oil offers antimicrobial and antioxidant benefits but is highly irritating and sensitizing, making it risky for most skincare routines.

Irritation

high

Source

natural

beautyskincareessential oil
Read ingredient review

Antioxidant

Clove Leaf Extract

EUGENIA CARYOPHYLLUS LEAF EXTRACT

3.8

Clove leaf extract offers antioxidant and soothing benefits but can be irritating for sensitive skin at higher concentrations.

Irritation

moderate

Source

natural

beautyskincarebotanical extract
Read ingredient review

Fragrance

Clove Leaf Oil

EUGENIA CARYOPHYLLUS LEAF OIL

3.5

Clove leaf oil can add a warm, spicy scent and mild antimicrobial benefits, but it is a known skin sensitizer and should be used with caution, especially at high concentrations.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Antimicrobial

Clove Oil

EUGENIA CARYOPHYLLUS (CLOVE) LEAF OIL

3.5

Clove oil can help fight acne-causing bacteria, but it is very potent and can easily irritate or burn skin if used undiluted.

Irritation

high

Source

natural

beautyskincareantimicrobial
Read ingredient review

Antioxidant

Clove Seed Extract

EUGENIA CARYOPHYLLUS SEED EXTRACT

3.8

Clove Seed Extract offers antioxidant benefits but can be irritating for sensitive skin due to its high eugenol content.

Irritation

moderate

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Clove Stem Extract

EUGENIA CARYOPHYLLUS STEM EXTRACT

3.8

A natural antioxidant extract from clove stems that may help protect skin from environmental stress, but can be irritating for sensitive skin.

Irritation

moderate

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Clove Stem Oil

EUGENIA CARYOPHYLLUS STEM OIL

3.5

Clove stem oil can add fragrance and antimicrobial benefits to skincare, but its high eugenol content makes it a common skin irritant and allergen.

Irritation

moderate

Source

natural

beautyskincareessential oil
Read ingredient review

Antioxidant

Clover & Mung Bean Sprout Extract

Trifolium Pratense (Clover) Sprout Extract / Vigna Radiata (Mung Bean) Sprout Extract

4.0

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Cnidium Callus Culture Extract

Cnidium Officinale Callus Culture Extract

4.0

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

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review

Antioxidant

Cnidium Monnieri Fruit Extract

CNIDIUM MONNIERI FRUIT EXTRACT

3.8

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
Read ingredient review

Antioxidant

Cnidium Root Extract

CNIDIUM OFFICINALE ROOT EXTRACT

3.8

A gentle botanical extract with antioxidant potential, but research in cosmetics is still limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Soothing Agent

Cnidium Root Water

Cnidium Officinale Root Water

3.8

A gentle, water-based botanical extract with traditional use for soothing skin, though modern research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing agent

Cnidium Seed Powder

CNIDIUM MONNIERI SEED POWDER

3.8

A gentle botanical powder that may help calm redness and provide antioxidant protection, but human skin research is still limited.

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review

Antioxidant

Cobalt Acetylmethionate

COBALT ACETYLMETHIONATE

3.0

Cobalt Acetylmethionate is a synthetic ingredient that may offer antioxidant benefits, but its use is limited by safety concerns and a lack of robust human studies.

Irritation

moderate

Source

synthetic

beautyskincareantioxidant
Read ingredient review

Colorant

Cobalt Aluminum Oxide

Cobalt Aluminum Oxide

3.5

Cobalt Aluminum Oxide is a safe, stable blue pigment for cosmetics, but it's not a skincare active and offers no skin benefits beyond color.

Irritation

low

Source

synthetic

beautyskincarecolorant
Read ingredient review

Colorant

Cobalt Titanium Oxide

Cobalt Titanium Oxide

3.0

A safe, stable pigment for color cosmetics, but not a skincare active and offers no skin benefits beyond color.

Irritation

low

Source

synthetic

beautyskincarecolorant
Read ingredient review

Skin conditioning agent

Cobamamide

Cobamamide

3.8

Cobamamide is a gentle, active form of vitamin B12 that may help calm redness and support skin repair, but research in topical skincare is still limited.

Irritation

low

Source

biotech

beautyskincarevitamin
Read ingredient review

Humectant

Cobetia Marina Glycosaminoglycans

Cobetia Marina Glycosaminoglycans

4.0

A biotech marine ingredient that mimics the skin's natural moisture-holding molecules, offering gentle hydration and a plumping effect.

Irritation

low

Source

biotech

beautyskincarehumectant
Read ingredient review

Surfactant

Cocamide

Cocamide

3.5

Cocamide helps create rich lather in cleansers but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

natural

beautyskincaresurfactant
Read ingredient review

Surfactant

Cocamide DEA

Cocamide DEA

3.0

Cocamide DEA is an effective foaming agent, but its potential to form carcinogenic impurities and cause skin irritation makes it a controversial choice in modern formulations.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Cocamide DIPA

Cocamide DIPA

3.8

Cocamide DIPA helps create rich lather and thick texture in cleansers, but may be slightly drying for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Foam Booster

Cocamide MEA

Cocamide MEA

3.8

Cocamide MEA is an effective foam booster and thickener, but it can be mildly irritating for sensitive skin and has raised some environmental concerns.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

Cocamide Methyl MEA

Cocamide Methyl MEA

3.8

A coconut-derived foaming agent that helps cleansers lather and feel thicker, but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Cocamide MIPA

Cocamide MIPA

3.5

Cocamide MIPA is a coconut-derived ingredient that helps create rich lather, but it may be mildly irritating for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Cocamidoethyl Betaine

Cocamidoethyl Betaine

4.0

A gentle, coconut-derived cleansing agent that helps create a rich lather without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

Cocamidopropyl Betaine

Cocamidopropyl Betaine

4.0

A gentle, coconut-derived foaming agent that helps cleansers feel less stripping, though a small number of people may react to impurities.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Cocamidopropyl Morpholine

Cocamidopropyl Morpholine

3.5

Cocamidopropyl Morpholine is an effective emulsifier and surfactant, but may cause irritation for sensitive skin types, especially in high concentrations.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Cocamidopropyl Morpholine Lactate

Cocamidopropyl Morpholine Lactate

3.5

A mild surfactant that helps create rich foam and leaves skin feeling soft, but may cause irritation for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Antistatic Agent

Cocamidopropyltrimonium Chloride

Cocamidopropyltrimonium Chloride

3.8

A gentle conditioning ingredient that reduces static and improves hair manageability, but may cause mild irritation in sensitive individuals.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Surfactant

Cocamine Oxide

Cocamine Oxide

4.0

A gentle, coconut-derived surfactant that helps create a rich lather and is less stripping than harsher cleansers.

Irritation

low

Source

natural

beautyskincarehaircaresurfactant
Read ingredient review

Surfactant

Cocaminobutyric Acid

Cocaminobutyric Acid

3.8

A gentle, coconut-derived surfactant that cleanses without stripping the skin barrier, suitable for sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

Cocaminopropionic Acid

Cocaminopropionic Acid

4.0

A gentle, coconut-derived cleanser that effectively removes dirt and oil without stripping the skin, making it ideal for sensitive or dry skin types.

Irritation

low

Source

natural

beautyskincarecleanser
Read ingredient review

Antioxidant

Coccinia Indica Fruit Extract

COCCINIA INDICA FRUIT EXTRACT

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review