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

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

Exfoliant

Robusta Coffee Seed Powder

Coffea Robusta Seed Powder

3.8

A natural physical exfoliant with antioxidant potential, but the gritty texture can be too harsh for sensitive or acne-prone skin.

Irritation

moderate

Source

natural

beautyskincareexfoliant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

Fragrance

Rocky Mountain Juniper Oil

JUNIPERUS SCOPULORUM LEAF/STEM OIL

3.5

A fragrant essential oil from Rocky Mountain juniper that adds a woodsy scent and may offer mild antioxidant benefits, but can be irritating for sensitive skin.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

Soothing agent

Roman Chamomile Flower Oil

Anthemis Nobilis Flower Oil

4.0

Roman chamomile flower oil is a gentle, fragrant oil that helps calm irritated skin and reduce redness, but it should be used in low concentrations and avoided by those with ragweed allergies.

Irritation

low

Source

natural

beautyskincaresoothing
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

Emollient

Rosa Multiflora Seed Oil

Rosa Multiflora Seed Oil

4.0

A gentle, non-greasy seed oil that hydrates and supports skin barrier function with a favorable fatty acid profile.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Emollient

Rosa Roxburghii Seed Oil

Rosa Roxburghii Seed Oil

4.3

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

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Soothing agent

Rosa Rugosa Bud Powder

Rosa Rugosa Bud Powder

3.8

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

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review

Soothing Agent

Rosa Rugosa Flower Oil

Rosa Rugosa Flower Oil

4.0

A gentle, fragrant flower oil that may help calm skin and provide antioxidant benefits, but its primary role in many products is scent.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Fragrance

Rosa Rugosa Flower Water

ROSA RUGOSA FLOWER WATER

3.8

A gentle, lightly astringent floral water that can refresh and soothe skin, but its benefits are mostly anecdotal and it may cause sensitivity in those allergic to roses.

Irritation

low

Source

natural

beautyskincaretonerfragrance
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

Soothing Agent

Rose Bud Extract

Rosa Damascena Bud Extract

4.0

A gentle, fragrant rose extract that helps calm skin and fight free radicals, but its benefits are mostly from its antioxidant and soothing compounds rather than dramatic anti-aging effects.

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

Exfoliant

Rose Canina Flower Powder

Rosa Canina Flower Powder

3.8

A gentle botanical powder that provides mild physical exfoliation and may offer antioxidant benefits, but research on its specific skincare effects is limited.

Irritation

low

Source

natural

beautyskincareexfoliant
Read ingredient review

Soothing Agent

Rose Centifolia Bud Extract

Rosa Centifolia Bud Extract

4.0

A mild, fragrant rose extract that helps calm skin and fight free radicals, but its benefits are subtle and not as potent as some other antioxidants.

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review

Fragrance

Rose Centifolia Flower Oil

Rosa Centifolia Flower Oil

4.0

A fragrant, soothing oil with antioxidant benefits, but can be irritating for sensitive skin due to its natural fragrance compounds.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

Exfoliant

Rose Damascena Flower Powder

Rosa Damascena Flower Powder

3.8

A gentle, natural exfoliant with a pleasant rose scent, best suited for dry or normal skin types in rinse-off formulations.

Irritation

low

Source

natural

beautyskincareexfoliant
Read ingredient review

Emollient

Rose Damascena Flower Wax

Rosa Damascena Flower Wax

4.0

A gentle, fragrant wax that softens skin and adds a natural rose scent, but offers limited active benefits beyond moisturizing.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

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

beautyskincareantioxidant
Read ingredient review

Humectant

Rose Flower Juice

Rosa Centifolia Flower Juice

3.8

A gentle, fragrant floral water that provides light hydration and a soothing feel, but its benefits are mostly sensory and short-lived.

Irritation

low

Source

natural

beautyskincarehumectant
Read ingredient review

Fragrance

Rose Flower Oil

Rosa Damascena Flower Oil

4.0

Rose flower oil adds a luxurious scent and offers mild antioxidant and soothing benefits, but it can cause irritation in sensitive individuals and is primarily used for fragrance.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Soothing Agent

Rose Flower Water

ROSA HYBRID FLOWER WATER

4.0

A mild, aromatic hydrator that can soothe skin and add a pleasant scent, but its benefits are largely from water and trace rose compounds.

Irritation

low

Source

natural

beautyskincaresoothing
Read ingredient review

Emollient

Rose Flower Wax

Rosa Hybrid Flower Wax

4.0

A gentle, natural wax that adds texture and a subtle rose scent to balms and creams, but offers limited active skincare benefits.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Exfoliant

Rose Gallica Flower Powder

Rosa Gallica Flower Powder

3.8

A gentle, natural exfoliant and soothing powder from rose petals, best for dry or normal skin types seeking a mild physical scrub.

Irritation

low

Source

natural

beautyskincareexfoliant
Read ingredient review

Fragrance

Rose Geranium Flower Extract

Pelargonium Graveolens Flower Extract

4.0

A gentle, rose-scented botanical extract that offers antioxidant and soothing benefits, but its fragrance can be a concern for sensitive skin.

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Fragrance

Rose Geranium Flower Water

PELARGONIUM GRAVEOLENS FLOWER WATER

4.0

A gentle, lightly astringent floral water that can help refresh and balance skin without the intensity of essential oils.

Irritation

low

Source

natural

beautyskincarebotanical water
Read ingredient review

Fragrance

Rose Geranium Leaf Extract

Pelargonium Roseum Leaf Extract

4.0

A gentle, rose-scented botanical extract that offers mild antioxidant and soothing benefits, but its primary role in most products is fragrance.

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Fragrance

Rose Geranium Oil

PELARGONIUM ROSEUM STEM OIL

4.0

Rose geranium oil adds a pleasant floral scent and may help balance oily or combination skin, but it can be irritating for sensitive skin if used undiluted.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Fragrance

Rose Geranium Stem Extract

Pelargonium Roseum Stem Extract

3.8

A mild botanical extract that adds a rosy scent and some antioxidant activity, but its benefits are not as well-studied as the essential oil.

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Fragrance

Rose Geranium Water

Pelargonium Graveolens Water

3.8

A gentle, lightly fragrant hydrosol that can refresh skin and offer mild astringent benefits, but its active compound levels are very low.

Irritation

low

Source

natural

beautyskincaretoner
Read ingredient review

Fragrance Ingredient

Rose Ketone-2

CIS-ROSE KETONE-2

3.8

Rose Ketone-2 is a synthetic fragrance compound that adds a soft, powdery rose note to products, but it offers no skincare benefits and may be a concern for those with fragrance sensitivities.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance

Rose Ketone-3

Damascenone

3.5

Rose Ketone-3 is a synthetic fragrance ingredient that gives a pleasant rose scent, but may cause irritation in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Rose Ketone-4

Damascenone

3.5

Rose Ketone-4 is a natural fragrance compound that gives a rose-like scent, but it can be a skin sensitizer for some people.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review