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

Emollient

Brazilian Pepper Fruit Oil

Schinus Terebinthifolia Fruit Oil

3.8

A lightweight, antioxidant-rich oil that may help soothe and protect the skin, but research is still limited.

Irritation

low

Source

natural

beautyskincareemollient
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Antioxidant

Brazilian Pepper Seed Extract

Schinus Terebinthifolia Seed Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Emollient

Brazilian Pepper Seed Oil

Schinus Terebinthifolius Seed Oil

3.8

A lightweight, antioxidant-rich oil that may help soothe and moisturize skin, but its comedogenic potential means it's best for normal to dry skin types.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Brazilian Pequi Seed Oil

Caryocar brasiliense seed oil

4.0

A gentle, antioxidant-rich oil that helps moisturize and protect the skin without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Brazilian Seed Ester

LAURYL CARPOTROCHE BRASILIENSIS SEEDATE

4.0

A gentle, plant-based emollient that softens and smooths skin with a lightweight feel, though research on its specific benefits is still limited.

Irritation

low

Source

natural

beautyskincareemollient
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Antioxidant

Brazilwood Extract

HAEMATOXYLUM BRASILETTO WOOD EXTRACT

4.0

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

Irritation

low

Source

natural

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Anti-aging agent

Brazzeana Defensin-Like Protein

S-Pentadiplandra Brazzeana Defensin-Like Protein

3.5

A novel plant protein with promising anti-aging potential, but research is still early and it's not widely available in consumer products.

Irritation

low

Source

natural

beautyskincareactive
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Antioxidant

Breadfruit Wood Extract

Artocarpus Altilis Wood Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Briareum Excavatum Extract

Briareum Excavatum Extract

3.5

A marine-derived antioxidant extract with limited but promising research; best for soothing and protecting sensitive skin.

Irritation

low

Source

natural

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Antioxidant

Bridal Wreath Extract

SPIRAEA PRUNIFOLIA BRANCH/LEAF EXTRACT

3.8

A gentle plant extract with antioxidant potential, but research is limited and benefits are not yet well-established.

Irritation

low

Source

natural

beautyskincareantioxidant
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Colorant

Brilliant Black 1

CI 28440

3.0

Brilliant Black 1 is a safe synthetic colorant for most people, but those with sensitive skin or allergies should patch test first.

Irritation

low

Source

synthetic

beautyskincarecolorant
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Soothing Agent

British Yellowhead Extract

INULA BRITANNICA FLOWER/LEAF/STEM 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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Antioxidant

Broccoli Leaf/Root Extract

Brassica Oleracea Italica Leaf/Root Extract

4.0

A gentle, antioxidant-rich plant extract that helps protect skin from environmental stress and may calm irritation.

Irritation

low

Source

natural

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Emollient

Broccoli Seed Oil

Brassica Oleracea Italica Seed Oil

4.3

Broccoli seed oil is a lightweight, non-greasy plant oil that mimics silicones, making hair soft and shiny while moisturizing skin without clogging pores.

Irritation

low

Source

natural

beautyskincarehaircare
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Emollient

Broccoli Seed Oil Unsaponifiables

Brassica Oleracea Botrytis Oil Unsaponifiables

4.0

A lightweight, plant-derived emollient that mimics silicones and offers antioxidant benefits without clogging pores.

Irritation

low

Source

natural

beautyskincarehaircare
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Antioxidant

Broccoli Sprout Powder

Brassica Oleracea Italica Sprout Powder

4.0

A gentle, antioxidant-rich powder from broccoli sprouts that helps protect skin from environmental stress and may calm irritation.

Irritation

low

Source

natural

beautyskincareantioxidant
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Exfoliant

Bromelain

Bromelain

4.0

A gentle pineapple-derived enzyme that exfoliates and calms skin, but may irritate sensitive skin if overused.

Irritation

moderate

Source

natural

beautyskincareexfoliant
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Antioxidant

Bromelia Balanse Extract

Bromelia Balanse Extract

3.5

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Colorant

Bromocresol Green

BROMOCRESOL GREEN

2.0

Bromocresol Green is a synthetic dye used to adjust product color or indicate pH, but it offers no skincare benefits and may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarecolorant
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Preservative

Bromoethyl PCA

Bromoethyl PCA

3.0

Bromoethyl PCA is a synthetic preservative booster that helps prevent microbial growth, but its safety data is limited and it may cause irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
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Colorant

Bromothymol Blue

Bromothymol Blue

2.0

Bromothymol Blue is a synthetic dye used for color, not a beneficial skincare ingredient; it adds no proven skin benefits.

Irritation

low

Source

synthetic

beautyskincarecolorant
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Preservative

Bronidox

5-BROMO-5-NITRO-1,3-DIOXANE

2.0

An effective but controversial preservative that is now banned in the EU and restricted elsewhere due to potential skin irritation and nitrosamine formation.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
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Preservative

Bronopol

2-Bromo-2-Nitropropane-1,3-Diol

3.5

An effective preservative but can be irritating and may release formaldehyde under certain conditions.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
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Opacifying Agent

Bronzite Powder

Bronzite Powder

3.8

Bronzite powder is a natural mineral that adds a warm, golden shimmer to cosmetics, but it's purely aesthetic with no proven skincare benefits.

Irritation

low

Source

natural

beautyskincarecosmetic pigment
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Antioxidant

Brooklime Extract

Veronica Beccabunga Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Broom Extract

Sarothamnus Scoparius 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

beautyskincareantioxidant
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Antioxidant

Broom Flower Extract

Cytisus Scoparius Flower Extract

3.5

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Emollient

Broom Flower Wax

CYTISUS SCOPARIUS FLOWER WAX

4.0

A gentle plant wax that adds richness and stability to balms and creams without common irritation.

Irritation

low

Source

natural

beautyskincareemollient
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Antioxidant

Broom Plant Extract

CYTISUS SCOPARIUS BRANCH/FLOWER/LEAF EXTRACT

3.5

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Broomrape Extract

Orobanche Rapum Extract

3.8

A gentle plant extract with antioxidant potential, but research is limited and it's not a powerhouse ingredient.

Irritation

low

Source

natural

beautyskincareantioxidant
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Skin Brightener

Broussonetia Kazinoki Bark Extract

BROUSSONETIA KAZINOKI BARK EXTRACT

4.0

A gentle plant extract that may help even skin tone and protect against environmental damage, but research is still limited compared to more established brighteners.

Irritation

low

Source

natural

beautyskincareantioxidant
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Skin Brightener

Broussonetia Kazinoki Root Extract

BROUSSONETIA KAZINOKI ROOT EXTRACT

4.0

A gentle plant extract that may help even out skin tone and protect against environmental damage, but more human studies are needed to confirm its brightening effects.

Irritation

low

Source

natural

beautyskincareantioxidant
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Colorant

Brown No. 1

CI 12480

3.5

A safe, widely used synthetic colorant for brown shades, but offers no skincare benefits.

Irritation

low

Source

synthetic

beautyskincarecolorant
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Antioxidant

Brown Seaweed Extract

Dictyopteris Polypodioides Extract

4.0

A gentle brown seaweed extract that may help calm skin and fight environmental stress, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Brown Seaweed Powder

NEMACYSTUS DECIPIENS POWDER

4.0

A gentle, hydrating seaweed powder that helps skin retain moisture and may soothe irritation.

Irritation

low

Source

natural

beautyskincarehumectant
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Antioxidant

Brucea Amarissima Gall Extract

Brucea Amarissima Gall Extract

3.8

A gentle plant extract with antioxidant potential, but research is still early and benefits are not yet well-established.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Brush Cherry Fruit Extract

SYZYGIUM AUSTRALE FRUIT EXTRACT

3.8

A gentle, antioxidant-rich fruit 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

Brussels Sprout Extract

Brassica Oleracea Gemmifera Extract

3.8

A gentle, antioxidant-rich plant extract that may help protect skin from environmental stress, but research on its topical benefits is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Bryonolic Acid

Bryonolic Acid

3.5

Bryonolic Acid is a plant-based antioxidant with early research suggesting anti-inflammatory benefits, but it is not yet widely studied in human skin care.

Irritation

low

Source

natural

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Emollient

Bubulum Oil

Bubulum Oil

3.5

Bubulum oil is a traditional animal-derived emollient that softens skin but may clog pores for some.

Irritation

low

Source

natural

beautyskincareemollient
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Soothing agent

Buchu Leaf Extract

Barosma betulina leaf extract

3.8

Buchu leaf extract is a gentle botanical with traditional use for soothing skin, but scientific evidence for its cosmetic benefits is still limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Buchu Leaf/Twig Extract

Barosma betulina leaf/twig extract

3.8

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

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Buckwheat Callus Extract

POLYGONUM FAGOPYRUM CALLUS CULTURE EXTRACT

4.0

A gentle, lab-grown antioxidant that may help calm skin and fight environmental stress without irritation.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Buckwheat Ferment Extract

Aspergillus/Buckwheat Ferment Extract

4.0

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

Irritation

low

Source

biotech

beautyskincareantioxidant
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Absorbent

Buckwheat Flour

POLYGONUM FAGOPYRUM FLOUR

3.8

Buckwheat flour is a gentle, natural powder that absorbs excess oil and provides light physical exfoliation, but it may not suit those with buckwheat allergies.

Irritation

low

Source

natural

beautyskincareabsorbent
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Antioxidant

Buckwheat Leaf Extract

Polygonum Fagopyrum Leaf Extract

4.0

A gentle, plant-derived antioxidant that may help calm skin and defend against daily pollution and UV stress.

Irritation

low

Source

natural

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Antioxidant

Buckwheat Seed Extract

POLYGONUM FAGOPYRUM SEED EXTRACT

4.0

Buckwheat Seed Extract is a gentle, antioxidant-rich ingredient that helps calm skin and defend against environmental stress.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Buckwheat Sprout Extract

POLYGONUM FAGOPYRUM SPROUT EXTRACT

4.0

A gentle, plant-derived antioxidant that may help protect skin from environmental damage, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Buckwheat Stem Extract

POLYGONUM FAGOPYRUM STEM EXTRACT

3.8

Buckwheat Stem Extract is a gentle antioxidant-rich ingredient that may help calm skin and protect against environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Buddleja Davidii Extract

BUDDLEJA DAVIDII EXTRACT

4.0

A gentle botanical extract that helps defend skin from environmental stress and may calm irritation, but research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Buddleja Davidii Leaf Extract

BUDDLEJA DAVIDII LEAF EXTRACT

4.0

A gentle botanical extract 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

Buddleja Davidii Meristem Cell Culture

Buddleja Davidii Meristem Cell Culture

4.0

A gentle, lab-grown plant extract that may help protect skin from environmental stress and calm irritation, though human studies are still limited.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Buddleja Leaf Extract

Buddleja Officinalis Leaf Extract

4.0

A gentle botanical extract with antioxidant potential, but research on its topical benefits is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing Agent

Bugbane Extract

Cimicifuga Acerina Extract

3.5

A gentle botanical extract with antioxidant and soothing potential, but research is limited and it is not a standout ingredient.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Soothing Agent

Bugbane Root Extract

Actaea Heracleifolia Root Extract

3.5

A gentle botanical extract with potential soothing and antioxidant benefits, but research is limited and it's not a standout ingredient.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Bugleweed Callus Extract

Lycopus Maackianus Callus Culture Extract

3.8

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

Irritation

low

Source

biotech

beautyskincareantioxidant
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