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 20,303
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

Alpinia Intermedia Seed Water

Alpinia Intermedia Seed Water

3.8

A gentle, plant-derived water that may help calm skin and provide antioxidant protection, but research is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Alpinia Katsumadai Fruit Extract

ALPINIA KATSUMADAE FRUIT EXTRACT

4.0

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Alpinia Mutica Root Extract

Alpinia Mutica Root Extract

4.0

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Alpinia Nigra Root Powder

Alpinia Nigra Root Powder

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Alpinia Speciosa Extract

Alpinia Speciosa Root/Seed/Stem Extract

4.0

A gentle, plant-derived antioxidant that may help calm skin and defend against environmental stress, though human studies are limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Alpinia Speciosa Ferment

ALPINIA SPECIOSA LEAF/STEM FERMENT

4.0

A gentle, fermented botanical extract that may help calm skin and defend against environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Alpinia Speciosa Leaf Extract

Alpinia Speciosa Leaf Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Alpinia Speciosa Leaf Oil

ALPINIA SPECIOSA LEAF OIL

3.8

A fragrant essential oil from shell ginger leaves that adds a pleasant scent to products, but may cause irritation for sensitive skin.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Soothing Agent

Alpinia Speciosa Leaf Water

Alpinia Speciosa Leaf Water

3.8

A mild, plant-derived water that may offer soothing and antioxidant benefits, but research is limited and it's often used more for its light scent and hydrating feel than proven efficacy.

Irritation

low

Source

natural

beautyskincarebotanical
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Antioxidant

Alpinia Uraiensis Leaf Extract

ALPINIA URAIENSIS LEAF EXTRACT

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Fragrance

Alpinia Uraiensis Leaf Oil

Alpinia Uraiensis Leaf Oil

3.8

A fragrant plant oil with limited research; may offer mild skin benefits but poses a risk of irritation for sensitive skin.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Humectant

Alpinia Uraiensis Leaf Water

Alpinia Uraiensis Leaf Water

3.8

A gentle, hydrating botanical water that may offer antioxidant and soothing benefits, but research is limited.

Irritation

low

Source

natural

beautyskincarebotanical water
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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
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Fragrance

Alpinia Zerumbet Leaf Oil

ALPINIA ZERUMBET LEAF OIL

3.8

A fragrant leaf oil with mild antioxidant potential, best suited for those who enjoy botanical scents and have no sensitivity to essential oils.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Soothing Agent

Alpinia Zerumbet Leaf Water

ALPINIA ZERUMBET LEAF WATER

3.8

A gentle, water-based botanical extract that may offer mild soothing and antioxidant benefits, but research is limited.

Irritation

low

Source

natural

beautyskincarebotanical
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Soothing Agent

Alpinia Zerumbet Leaf/Stem Water

ALPINIA ZERUMBET LEAF/STEM WATER

3.8

A gentle, water-like botanical ingredient that may help calm skin and provide antioxidant support, but research on its specific benefits is still limited.

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review

Antioxidant

Alpinia Zerumbet Seed Extract

ALPINIA ZERUMBET SEED EXTRACT

3.8

A gentle plant extract that may help protect skin from environmental stress and calm minor irritation, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Alpinia Zerumbet Seed Powder

ALPINIA ZERUMBET SEED POWDER

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Alpinia Zerumbet Seed Water

ALPINIA ZERUMBET SEED WATER

3.8

A gentle, antioxidant-rich water from shell ginger seeds that may help calm skin and fight free radicals, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Emollient

Alternanthera Sessilis Oil

Alternanthera Sessilis Oil

3.8

A gentle, plant-derived oil with traditional use for soothing skin, though modern research is still limited.

Irritation

low

Source

natural

beautyskincareemollient
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Abrasive

Alumina

Alumina

3.5

Alumina is a safe, effective abrasive for exfoliation and texture, but can be irritating if particles are too large or used too aggressively.

Irritation

moderate

Source

natural

beautyskincareabrasive
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Astringent

Aluminum Acetate

ALUMINUM ACETATE

3.5

Aluminum acetate is a mild astringent that can help soothe minor skin irritations, but it is not a common everyday skincare ingredient and may cause dryness or irritation with overuse.

Irritation

moderate

Source

synthetic

beautyskincareastringent
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Viscosity Controlling

Aluminum Behenate

Aluminum Behenate

3.5

Aluminum behenate is a safe, synthetic thickener and stabilizer that helps keep makeup and creams smooth and consistent.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Colorant

Aluminum Benzoate

Aluminum Benzoate

2.5

Aluminum Benzoate is a synthetic colorant and opacifier with limited skincare benefits and potential concerns about aluminum absorption.

Irritation

low

Source

synthetic

beautyskincarecolorant
Read ingredient review

Antiperspirant

Aluminum Bromohydrate

ALUMINUM BROMOHYDRATE

3.5

Aluminum bromohydrate is a common antiperspirant active that effectively reduces sweat but may cause irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincareantiperspirant
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Opacifying Agent

Aluminum Calcium Manganese Oxide

Aluminum Calcium Manganese Oxide

3.5

A safe, non-irritating mineral pigment that adds opacity and subtle color to makeup, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarecolorant
Read ingredient review

Viscosity Controlling Agent

Aluminum Caprylate

Aluminum Caprylate

3.5

Aluminum Caprylate is a safe, synthetic thickener and stabilizer that helps maintain product texture but offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincareviscosity controlling agent
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Film Former

Aluminum Capryloyl Hydrolyzed Collagen

Aluminum Capryloyl Hydrolyzed Collagen

3.5

A collagen-based ingredient that helps control shine and smooth skin texture, but its aluminum content raises mild precaution for sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincarefilm former
Read ingredient review

Astringent

Aluminum Chloride

Aluminum Chloride

3.8

Aluminum chloride is effective at reducing sweat but can cause irritation and has raised safety questions; use with caution on sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincareastringent
Read ingredient review

Antiperspirant Agent

Aluminum Chlorohydrate

Aluminum Chlorohydrate

4.0

Aluminum chlorohydrate is an effective antiperspirant that blocks sweat glands temporarily, but it may cause irritation for sensitive skin and has been the subject of ongoing safety debates.

Irritation

moderate

Source

synthetic

beautyskincareantiperspirant
Read ingredient review

Astringent

Aluminum Citrate

ALUMINUM CITRATE

3.5

Aluminum citrate works as an astringent and antiperspirant, but may cause irritation for sensitive skin and raises environmental concerns.

Irritation

moderate

Source

synthetic

beautyskincareastringent
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Astringent

Aluminum Diacetate

Aluminum Diacetate

3.5

Aluminum Diacetate works as an astringent to tighten skin and reduce sweat, but it can be drying and may irritate sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincareastringent
Read ingredient review

Viscosity Controlling

Aluminum Dibenzoyl Stearate Hydroxide

ALUMINUM DIBENZOATE/STEARATE HYDROXIDE

3.5

A synthetic thickener and stabilizer that helps keep formulas smooth and consistent, but it's not a skincare active.

Irritation

low

Source

synthetic

beautyskincarecosmetic ingredient
Read ingredient review

Emulsifier

Aluminum Dicetyl Phosphate

Aluminum Dicetyl Phosphate

4.0

A gentle synthetic emulsifier that helps blend water and oil in creams and lotions, giving them a smooth, non-greasy feel.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Viscosity Controlling Agent

Aluminum Dilinoleate

ALUMINUM DILINOLEATE

3.5

A safe and effective thickener and stabilizer that improves product texture and shelf life, but offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincareviscosity controlling agent
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Viscosity Controlling

Aluminum Dimyristate

Aluminum Dimyristate

3.5

A safe, synthetic thickener and opacifier that improves product texture and stability without major skin concerns.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Viscosity controlling agent

Aluminum Distearate

ALUMINUM DISTEARATE

3.8

Aluminum Distearate is a safe, synthetic thickener that helps keep creams and makeup smooth and stable, but it offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincarecosmetic ingredient
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Astringent

Aluminum Glycinate

Aluminum Glycinate

3.5

Aluminum Glycinate helps reduce sweat and tighten skin, but may cause irritation for sensitive skin types.

Irritation

moderate

Source

synthetic

beautyskincareastringent
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Colorant

Aluminum Hydroxide

CI 77002

4.0

A safe, mineral-based colorant that adds opacity and a matte finish to makeup, with a strong safety record.

Irritation

low

Source

natural

beautyskincarecolorant
Read ingredient review

Thickener

Aluminum Hydroxide Oxide

ALUMINUM HYDROXIDE OXIDE

3.5

A safe, non-irritating mineral that improves product texture and opacity but offers no direct skin benefit.

Irritation

low

Source

natural

beautyskincaretexturizer
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Stabilizer

Aluminum Isopropoxide

ALUMINUM ISOPROPOXIDE

2.5

Aluminum isopropoxide is a synthetic stabilizer rarely used in leave-on skincare; it may pose irritation risks and is best avoided in sensitive skin products.

Irritation

moderate

Source

synthetic

beautyskincarestabilizer
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Viscosity Controlling Agent

Aluminum Isostearate

Aluminum Isostearate

3.5

A synthetic thickener and stabilizer that improves product texture and feel, generally considered safe for most skin types.

Irritation

low

Source

synthetic

beautyskincarecosmetic
Read ingredient review

Viscosity Controlling

Aluminum Isostearates/Laureates/Stearates

ALUMINUM ISOSTEARATES/LAURATES/STEARATES

3.5

A synthetic thickener and stabilizer that helps keep makeup and creams smooth and consistent, but its aluminum content raises mild safety questions for some users.

Irritation

low

Source

synthetic

beautyskincarecosmetic ingredient
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Viscosity Controlling Agent

Aluminum Isostearates/Myristates

ALUMINUM ISOSTEARATES/MYRISTATES

3.5

A synthetic thickener and stabilizer that helps create smooth, creamy textures in makeup and skincare, but its aluminum content raises questions for some users.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Viscosity controlling agent

Aluminum Isostearates/Palmitates

ALUMINUM ISOSTEARATES/PALMITATES

3.5

A synthetic thickener and stabilizer that helps keep makeup and creams smooth, but may be moderately pore-clogging for some.

Irritation

low

Source

synthetic

beautyskincarethickener
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Viscosity Controlling

Aluminum Isostearates/Stearates

Aluminum Isostearates/Stearates

3.5

A safe and effective thickener and stabilizer that helps create smooth, creamy textures in makeup and skincare, but offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincarecosmetic
Read ingredient review

Astringent

Aluminum Lactate

Aluminum Lactate

3.5

Aluminum Lactate works as an astringent to reduce sweat and tighten pores, but may cause irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincareastringent
Read ingredient review

Emollient

Aluminum Lanolate

ALUMINUM LANOLATE

3.5

Aluminum Lanolate is a waxy stabilizer that helps keep water and oil mixed, but it may not suit acne-prone skin due to its moderate comedogenic potential.

Irritation

low

Source

semi-synthetic

beautyskincareemollientstabilizer
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Astringent

Aluminum Methionate

Aluminum Methionate

3.5

Aluminum Methionate works as an astringent and antiperspirant, but its safety is debated and it may irritate sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincareantiperspirant
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Viscosity controlling agent

Aluminum Myristate

ALUMINUM MYRISTATE

3.5

Aluminum Myristate is a synthetic thickener and opacifier that improves product texture but may be moderately comedogenic for acne-prone skin.

Irritation

low

Source

synthetic

beautyskincarecosmetic
Read ingredient review