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 4,092
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

Rice Triterpenoids

Rice Bran/Germ Triterpenoids

4.0

A gentle, antioxidant-rich ingredient from rice that helps calm skin and support its natural barrier.

Irritation

low

Source

natural

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Antioxidant

Robusta Coffee Flower Extract

Coffea Canephora Flower Extract

3.8

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

Irritation

low

Source

natural

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Antioxidant

Robusta Coffee Fruit Extract

Coffea Robusta Fruit Extract

4.0

A gentle, antioxidant-packed fruit extract that helps protect skin from environmental stress and may support a more even-looking complexion.

Irritation

low

Source

natural

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Antioxidant

Robusta Coffee Seed Extract

Coffea Robusta Seed Extract

4.0

A gentle, antioxidant-rich extract that helps protect skin from environmental stress and may reduce puffiness.

Irritation

low

Source

natural

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Antioxidant

Rock Rose Flower Extract

Helianthemum Nummularium Flower Extract

3.8

A gentle botanical extract with antioxidant potential, but research is limited compared to more established plant extracts.

Irritation

low

Source

natural

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Antioxidant

Rocky Mountain Juniper Extract

Juniperus Scopulorum Extract

3.8

A gentle, antioxidant-rich botanical extract that may help calm skin and fight free radical damage, though research on its topical benefits is still emerging.

Irritation

low

Source

natural

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Antioxidant

Rodgersia Root Extract

Rodgersia Podophylla Root Extract

3.5

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

Irritation

low

Source

natural

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Antioxidant

Rooibos Leaf Extract

Aspalathus Linearis Leaf Extract

4.0

A gentle, antioxidant-rich botanical that helps calm skin and defend against environmental stress without irritation.

Irritation

low

Source

natural

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Antioxidant

Rooibos Leaf/Stalk Extract

Aspalathus Linearis Leaf/Stalk Extract

4.2

A gentle, antioxidant-rich botanical extract that helps calm redness and protect skin from daily environmental damage.

Irritation

low

Source

natural

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Antioxidant

Root Extract Complex

Root Extract (multiple species)

3.8

A gentle, antioxidant-rich blend of root extracts that may help calm skin and fight environmental stress, but benefits vary by specific plant source.

Irritation

low

Source

natural

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Antioxidant

Rosa Centifolia Ferment Filtrate

Lactobacillus/Rosa Centifolia Flower Ferment Filtrate

4.0

A gentle fermented rose ingredient that may help soothe and protect skin, though research is still emerging.

Irritation

low

Source

biotech

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Antioxidant

Rosa Davurica Callus Extract

Rosa Davurica Callus Extract

4.0

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

Irritation

low

Source

natural

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Antioxidant

Rosa Davurica Leaf Extract

Rosa Davurica Leaf Extract

4.0

A gentle, antioxidant-rich leaf extract that helps protect skin from environmental stress while offering mild soothing benefits.

Irritation

low

Source

natural

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Antioxidant

Rosa Duvica Callus Extract

Rosa Duvica Callus Culture Extract

4.0

A gentle, lab-grown rose extract that may help protect skin from environmental stress and support a more resilient complexion.

Irritation

low

Source

biotech

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Antioxidant

Rosa Luciae Extract

Rosa Luciae Branch/Flower/Leaf Extract

3.8

A gentle botanical extract with antioxidant potential, but research is limited compared to more common rose extracts.

Irritation

low

Source

natural

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Antioxidant

Rosa Multiflora Fruit Extract

Rosa Multiflora Fruit Extract

4.0

A gentle, antioxidant-rich fruit extract that helps protect skin from environmental stress and supports a calm, even-looking complexion.

Irritation

low

Source

natural

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Antioxidant

Rosa Rugosa Fruit Extract

Rosa Rugosa Fruit Extract

4.0

A gentle, antioxidant-rich fruit extract that helps protect skin from environmental stress and supports a healthy-looking complexion.

Irritation

low

Source

natural

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Antioxidant

Rosa Rugosa Leaf Extract

Rosa Rugosa Leaf Extract

4.0

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

Irritation

low

Source

natural

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Antioxidant

Rosa Rugosa Root Extract

Rosa Rugosa Root Extract

3.8

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

Irritation

low

Source

natural

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Antioxidant

Rosa Rugosa Stem Extract

Rosa Rugosa Stem Extract

4.0

A gentle, antioxidant-rich plant extract that may help calm skin and defend against environmental stress.

Irritation

low

Source

natural

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Antioxidant

Rose Bracteata Extract

Rosa Bracteata Extract

4.0

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

Irritation

low

Source

natural

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Antioxidant

Rose Callus Culture Extract

Rosa Hybrid Callus Culture Extract

4.0

A gentle, lab-grown rose extract that may help protect skin from environmental stress, but research is still early.

Irritation

low

Source

biotech

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Antioxidant

Rose Callus Extract

Rosa Gallica Callus Extract

4.0

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

Irritation

low

Source

natural

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Antioxidant

Rose Callus Powder

Rosa Gallica Callus Powder

4.0

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

Irritation

low

Source

natural

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Antioxidant

Rose Canina Flower Extract

Rosa Canina Flower Extract

4.0

A gentle, antioxidant-rich flower extract that helps calm skin and protect against environmental stress without clogging pores.

Irritation

low

Source

natural

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Antioxidant

Rose Cow-wheat Extract

MELAMPYRUM ROSEUM 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

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Antioxidant

Rose Ferment Filtrate

Saccharomyces/Rosa Damascena Flower Extract Ferment Filtrate

4.0

A gentle, fermented rose ingredient that may help soothe and protect the skin, but more research is needed to confirm its benefits.

Irritation

low

Source

biotech

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Fragrance

Rose Flower Extract

Rosa Odorata Extract

4.0

Rose flower extract adds a gentle, pleasant scent and offers mild antioxidant and soothing benefits, but its effects are subtle and not a substitute for proven active ingredients.

Irritation

low

Source

natural

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Antioxidant

Rose Leaf Cell Extract

Rosa Pendulina Leaf Cell Extract

4.0

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

Irritation

low

Source

biotech

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Humectant

Rose of Jericho Extract

SELAGINELLA PULVINATA EXTRACT

4.0

A unique desert plant extract that helps skin hold onto moisture and defend against environmental stress, though human studies are still limited.

Irritation

low

Source

natural

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Antioxidant

Rose Ovary Extract

Rosa Hybrid Ovary Extract

3.5

Rose ovary extract is a gentle, antioxidant-rich botanical that may help calm skin and protect against environmental stress, but research is still limited.

Irritation

low

Source

natural

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Antioxidant

Rose Phytoplacenta Extract

Rosa Hybrid Phytoplacenta Extract

3.5

A trendy botanical extract with antioxidant potential, but human studies are lacking and its benefits are mostly based on tradition and lab data.

Irritation

low

Source

natural

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Antioxidant

Rose Soybean Ferment Filtrate

Bacillus/Rose Flower/Soybean Ferment Filtrate

4.0

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

Irritation

low

Source

biotech

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Antioxidant

Rosehip Extract

Rosa Spinossissima Fruit Extract

4.0

A gentle, antioxidant-rich fruit extract that helps protect skin from environmental stress while soothing irritation.

Irritation

low

Source

natural

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Antioxidant

Rosehip Ferment Extract

PLEUROTUS/ROSA CANINA FERMENT EXTRACT

4.0

A gentle, fermented blend that may support skin radiance and antioxidant defense, though human studies are limited.

Irritation

low

Source

biotech

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Skin Conditioning

Rosehip Ferment Filtrate

SACCHAROMYCES/ROSA CANINA FRUIT OIL FERMENT FILTRATE

4.0

A gentle, fermented rosehip ingredient that may help soothe and condition skin, but research is still emerging.

Irritation

low

Source

biotech

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Antioxidant

Rosehip Fruit Juice

Rosa Canina Fruit Juice

4.0

Rosehip fruit juice is a gentle, antioxidant-rich ingredient that helps soothe and protect the skin, but it is less concentrated in fatty acids than rosehip oil.

Irritation

low

Source

natural

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Antioxidant

Rosehip Leaf Extract

Rosa Moschata Leaf Extract

4.0

A gentle, antioxidant-rich leaf extract that may help calm skin and defend against environmental stressors, though research on its specific benefits is still emerging.

Irritation

low

Source

natural

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Antioxidant

Rosehip Seed Extract

Rosa Canina Seed Extract

4.0

Rosehip seed extract is a gentle, antioxidant-rich ingredient that helps protect skin from environmental stress while soothing irritation.

Irritation

low

Source

natural

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Antioxidant

Rosemary Callus Extract

Rosmarinus Officinalis Callus Extract

4.0

A gentle, lab-grown rosemary extract that may help protect skin from environmental stress and calm irritation.

Irritation

low

Source

biotech

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Antioxidant

Rosemary Extract

Rosmarinus Officinalis (Rosemary) Flower/Leaf/Stem Extract

4.3

Rosemary extract is a gentle antioxidant that helps protect skin from environmental stress and may soothe minor irritation.

Irritation

low

Source

natural

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Antioxidant

Rosemary Flower Extract

Rosmarinus Officinalis Flower Extract

4.0

A gentle antioxidant extract from rosemary flowers that helps protect skin from environmental stress without causing irritation.

Irritation

low

Source

natural

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Skin conditioner

Rosemary Leaf Water

Rosmarinus Officinalis Leaf Water

4.0

Rosemary leaf water is a mild, fragrant hydrosol that can add light antioxidant benefits and a refreshing feel to skincare, but its effects are subtle compared to concentrated extracts.

Irritation

low

Source

natural

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Antioxidant

Rosemary Leaf/Stem Oil

Rosmarinus Officinalis Leaf/Stem Oil

4.0

Rosemary oil offers antioxidant and antimicrobial benefits but can be irritating for sensitive skin if used at high concentrations.

Irritation

moderate

Source

natural

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Antioxidant

Rosemary Phytoplacenta Extract

ROSMARINUS OFFICINALIS PHYTOPLACENTA EXTRACT

4.0

A gentle, lab-grown rosemary extract that may support skin repair and fight oxidative stress, though human studies are limited.

Irritation

low

Source

biotech

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Antioxidant

Rosmarinic Acid

Rosmarinic Acid

4.0

Rosmarinic acid is a gentle plant-derived antioxidant that helps calm skin and defend against environmental stress.

Irritation

low

Source

natural

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Antioxidant

Rosmarinyl Glucoside

Rosmarinyl Glucoside

4.0

Rosmarinyl Glucoside is a gentle antioxidant derived from rosemary that helps defend skin against free radicals without irritation.

Irritation

low

Source

natural

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Antioxidant

Rowan Berry Extract

SORBUS AUCUPARIA FRUIT EXTRACT

4.0

A gentle, antioxidant-packed fruit extract that helps protect skin from environmental stress and may support a more even tone.

Irritation

low

Source

natural

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Antioxidant

Rowan Bud Extract

Pyrus Sorbus Bud Extract

3.8

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

Irritation

low

Source

natural

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Antioxidant

Rowan Fruit and Leaf Extract

SORBUS AUCUPARIA FRUIT/LEAF EXTRACT

4.0

Rowan fruit and leaf extract is a gentle, antioxidant-rich botanical that may help protect skin from environmental stress while providing mild soothing benefits.

Irritation

low

Source

natural

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Antioxidant

Royal Fern Leaf Extract

Osmunda regalis leaf extract

3.8

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

Irritation

low

Source

natural

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Skin conditioning agent

Royal Jelly Ferment Filtrate

LACTOBACILLUS/ROYAL JELLY FERMENT FILTRATE

4.0

A gentle fermented ingredient that may help soothe and condition the skin, though research is still limited.

Irritation

low

Source

biotech

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Antioxidant

Rubus Chingii Fruit Extract

RUBUS CHINGII FRUIT EXTRACT

3.8

A gentle, antioxidant-rich fruit extract that may help protect skin from environmental stress, though research is still emerging.

Irritation

low

Source

natural

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Antioxidant

Rubusoside

RUBUSOSIDE

3.8

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

Irritation

low

Source

natural

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Antioxidant

Rudbeckia Hirta Seed Extract

RUDBECKIA HIRTA SEED EXTRACT

4.0

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

Irritation

low

Source

natural

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Antioxidant

Rumex Extract

Rumex Pseudonatronatus Flower/Leaf/Stem Extract

3.8

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

Irritation

low

Source

natural

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Antioxidant

Runner Bean Seed Extract

Phaseolus coccineus seed extract

3.8

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

Irritation

low

Source

natural

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