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

Antioxidant

Abrus Leaf Extract

Abrus Fruticulosus Leaf Extract

3.5

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Abrus Precatorius Meristem Cell Extract

Abrus Precatorius Meristem Cell Culture Extract

3.8

A plant stem cell extract that may help protect skin from environmental stress, but research is still emerging and it's not a proven anti-aging powerhouse.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Abrus Precatorius Root Extract

Abrus Precatorius Root Extract

3.0

A traditional botanical extract with potential soothing and antioxidant benefits, but safety concerns around the plant's seeds limit its use in modern cosmetics.

Irritation

moderate

Source

natural

beautyskincarebotanical extract
Read ingredient review

Antioxidant

Abrus Root Extract

Abrus Fruticulosus Root Extract

3.5

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

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Exfoliant

Acacia Arabica Bark Powder

Acacia Arabica Bark Powder

3.8

A gentle, natural exfoliating powder that helps remove dead skin cells and absorb excess oil, but research on its specific skincare benefits is limited.

Irritation

low

Source

natural

beautyskincareexfoliant
Read ingredient review

Astringent

Acacia Arabica Stem Bark Powder

Acacia Arabica Stem Bark Powder

3.8

A gentle botanical powder with traditional astringent benefits, but limited modern research to support strong skincare claims.

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review

Astringent

Acacia Catechu Bark Powder

Acacia Catechu Bark Powder

3.8

A gentle, plant-based astringent that can help tighten pores and calm irritation, but may be drying for very sensitive skin.

Irritation

low

Source

natural

beautyskincareastringent
Read ingredient review

Film Former

Acacia Catechu Gum

Acacia Catechu Gum

3.5

A natural gum that helps create a light, temporary film on skin, often used to improve texture or hold ingredients together.

Irritation

low

Source

natural

beautyskincarefilm-former
Read ingredient review

Astringent

Acacia Catechu Leaf/Wood Powder

Acacia Catechu Leaf/Wood Powder

3.8

A gentle botanical powder that may help calm irritation and tighten pores, but research is limited and it can be drying for some skin types.

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review

Absorbent

Acacia Catechu Seed Powder

Acacia Catechu Seed Powder

3.5

A gentle, natural absorbent powder from tree seeds that can help mattify skin and add texture to products, but research on its skincare benefits is limited.

Irritation

low

Source

natural

beautyskincareabsorbent
Read ingredient review

Antioxidant

Acacia Catechu Wood Extract

ACACIA CATECHU WOOD EXTRACT

3.8

A gentle botanical extract that helps tighten pores and fight free radicals, but research is mostly lab-based.

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Cleansing Agent

Acacia Concinna Fruit Extract

Acacia Concinna Fruit Extract

4.0

A gentle, plant-derived cleanser and conditioner that can be a mild alternative to sulfates, especially for those with sensitive scalps or hair.

Irritation

low

Source

natural

beautyskincarehaircare
Read ingredient review

Cleansing Agent

Acacia Concinna Fruit Powder

Acacia Concinna Fruit Powder

4.0

A gentle, plant-based cleanser rich in saponins that can help clean hair and skin without stripping natural oils.

Irritation

low

Source

natural

beautyskincarehaircare
Read ingredient review

Emollient

Acacia Dealbata Flower Wax

ACACIA DEALBATA FLOWER WAX

4.0

A gentle, plant-based wax that adds richness and staying power to balms and creams without common irritation.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Astringent

Acacia Decurrens Extract

Acacia Decurrens Extract

3.8

A gentle plant extract that may help tighten pores and fight free radicals, but research on its specific skin benefits is still limited.

Irritation

low

Source

natural

beautyskincareastringentantioxidant
Read ingredient review

Antioxidant

Acacia Decurrens Flower Extract

Acacia Decurrens Flower Extract

3.8

A gentle, antioxidant-rich flower extract that may help calm skin and fight free radical damage, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Emollient

Acacia Decurrens Flower Wax

Acacia Decurrens Flower Wax

4.0

A gentle, plant-derived wax that helps lock in moisture and gives a smooth, velvety feel to skincare products.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Emollient

Acacia Decurrens Wax Ester

ACACIA DECURRENS/JOJOBA/SUNFLOWER SEED CERA/POLYGLYCERYL-3 ESTERS

4.0

A gentle, plant-based wax ester that helps soften skin and improve product texture without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Emollient

Acacia Decurrens Wax Esters

Acacia Decurrens/Jojoba/Sunflower Seed Wax Polyglyceryl-3 Esters

4.3

A gentle, plant-based wax blend that helps create smooth, creamy textures while moisturizing the skin.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Antioxidant

Acacia Farnesiana Extract

Acacia Farnesiana Flower/Stem Extract

3.8

A gentle botanical extract that may help calm skin and provide antioxidant support, though research on its cosmetic benefits is still emerging.

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Soothing agent

Acacia Farnesiana Flower Extract

Acacia Farnesiana Flower Extract

3.8

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

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Thickener

Acacia Farnesiana Gum

Acacia Farnesiana Gum

3.8

A gentle natural gum that helps thicken formulas and leaves a light, non-sticky film on skin.

Irritation

low

Source

natural

beautyskincarethickener
Read ingredient review

Antioxidant

Acacia Farnesiana Stem Bark Extract

Acacia Farnesiana Stem Bark 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

beautyskincareantioxidant
Read ingredient review

Emollient

Acacia Flower Wax

Acacia Dealbata Flower Cera

4.0

A gentle, plant-derived wax that adds a smooth, velvety feel to balms and sticks without heavy greasiness.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Antioxidant

Acacia Saligna Leaf Extract

Acacia Saligna Leaf Extract

3.5

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Film Former

Acacia Senegal Gum Extract

Acacia Senegal Gum Extract

4.0

A gentle, plant-derived gum that helps smooth and soothe skin while creating a light, non-sticky protective film.

Irritation

low

Source

natural

beautyskincarefilm-former
Read ingredient review

Film Former

Acacia Seyal Gum Extract

Acacia Seyal Gum Extract

3.8

A gentle, plant-based gum that helps form a light, soothing film on skin, but its benefits are mostly texture-related rather than deeply active.

Irritation

low

Source

natural

beautyskincarefilm-former
Read ingredient review

Antioxidant

Acacia Victoriae Fruit Extract

Acacia Victoriae Fruit Extract

3.8

A gentle, antioxidant-rich botanical extract from an Australian native plant, best for soothing and protecting normal to dry skin.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Acacia Victoriae Seed Extract

Acacia Victoriae Seed Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Emollient

Acacia Victoriae Seed Oil

ACACIA VICTORIAE SEED OIL

4.0

A gentle, plant-based oil that hydrates and softens skin with a light feel, though research on its benefits is still emerging.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Antioxidant

Açaí Berry Extract

Euterpe Edulis Juice Extract

4.0

Açaí berry extract is a gentle antioxidant-rich ingredient that helps protect skin from environmental stress and may calm minor irritation.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Açaí Fruit Extract

Euterpe Oleracea Fruit Extract

4.0

Açaí fruit extract is a gentle, antioxidant-rich ingredient that helps defend the skin against free radicals and environmental damage, but its benefits are best supported by general antioxidant research rather than specific skin studies.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Açaí Palm Heart Extract

EUTERPE OLERACEA PALM HEART EXTRACT

3.8

A gentle, antioxidant-rich extract from açaí palm hearts that may help calm and protect skin, though research is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Açaí Pulp Powder

Euterpe Oleracea Pulp Powder

4.0

Açaí Pulp Powder is a gentle, antioxidant-packed ingredient that helps protect skin from environmental stress and supports a healthy-looking complexion.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Exfoliant

Açaí Seed Powder

Euterpe Oleracea Seed Powder

3.8

A natural, gentle physical exfoliant from açaí seeds, suitable for most skin types but with limited research on its specific benefits.

Irritation

low

Source

natural

beautyskincareexfoliant
Read ingredient review

Antioxidant

Acalypha Reptans Callus Extract

Acalypha Reptans Callus Culture Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Acanthopanax Callus Extract

Acanthopanax Sessiliflorus Callus 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

Antioxidant

Acanthopanax Root Extract

Acanthopanax Sessiliflorus Root Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Soothing Agent

Acanthus Mollis Leaf Extract

Acanthus Mollis Leaf Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Firming Agent

Acefylline Methylsilanol Mannuronate

Acefylline Methylsilanol Mannuronate

4.0

A science-backed firming ingredient that combines caffeine-like action with silicone and seaweed-derived acid to help tighten and smooth skin.

Irritation

low

Source

semi-synthetic

beautyskincareactive
Read ingredient review

Antioxidant

Acer Tegmentosum Stem Extract

Acer Tegmentosum Stem Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Acerola Fruit Extract

Malpighia Punicifolia Fruit Extract

4.0

Acerola fruit extract is a gentle, vitamin-C-rich antioxidant that can help brighten skin and defend against environmental stress, though its vitamin C content may degrade quickly in formulas.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Acerola Fruit Juice

Malpighia Glabra Fruit Juice

4.0

Acerola fruit juice is a gentle, natural source of vitamin C that can help brighten skin and fight free radical damage without the irritation of pure ascorbic acid.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Acerola Fruit Powder

MALPIGHIA EMARGINATA FRUIT POWDER

4.0

Acerola fruit powder is a gentle, natural source of vitamin C that can help brighten skin and fight free radicals, but its effectiveness depends on formulation and stability.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Acerola Fruit Water

Malpighia Glabra Fruit Water

4.0

Acerola fruit water is a gentle, antioxidant-rich hydrator that can help brighten and protect skin from environmental stress.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Acerola Seed Extract

MALPIGHIA EMARGINATA SEED EXTRACT

4.0

Acerola seed extract is a gentle, antioxidant-rich ingredient that helps protect skin from environmental stress, though research on its topical benefits is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance Ingredient

Acetaldehyde Diethyl Acetal

ACETALDEHYDE DIETHYL ACETAL

3.5

A synthetic fragrance ingredient that adds a fruity scent but may cause irritation in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Acetaldehyde Dipropyl Acetal

ACETALDEHYDE DIPROPYL ACETAL

3.5

A synthetic fragrance ingredient that adds a fresh scent but offers no skincare benefit; safe at low levels but may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Acetaldehyde Ethyl Cis-3-Hexenyl Acetal

ACETALDEHYDE ETHYL CIS-3-HEXENYL ACETAL

3.5

A synthetic fragrance ingredient that adds a fresh, green scent but offers no skincare benefits and may be a concern for those with fragrance sensitivities.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review