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 53 of 473
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

Exfoliant

Sweet Almond Bark Powder

Prunus Amygdalus Dulcis (Sweet Almond) Bark Powder

3.8

A gentle, natural physical exfoliant that helps smooth skin texture, but may be too abrasive for sensitive or compromised skin.

Irritation

moderate

Source

natural

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Exfoliant

Sweet Almond Seed

Prunus Amygdalus Dulcis (Sweet Almond) Seed

4.0

Sweet Almond Seed provides gentle physical exfoliation and a touch of nourishment, but its texture can vary and it may not suit very sensitive skin.

Irritation

low

Source

natural

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Exfoliant

Sweet Almond Seed Meal

Prunus Amygdalus Dulcis Seed Meal

4.0

A gentle, natural exfoliant that buffs away dead skin cells without harsh microbeads, but may feel gritty for sensitive skin.

Irritation

low

Source

natural

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Exfoliant

Sweet Almond Shell Extract

Prunus Amygdalus Dulcis (Sweet Almond) Shell Extract

3.8

A gentle, natural physical exfoliant that helps smooth skin without harsh chemicals, but may feel too gritty for sensitive skin.

Irritation

low

Source

natural

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Exfoliant

Sweet Almond Shell Powder

Prunus Amygdalus Dulcis Shell Powder

3.8

A gentle, natural physical exfoliant that sloughs off dead skin cells without harsh chemicals.

Irritation

low

Source

natural

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Exfoliant

Sweet Orange Flower-Leaf-Stem Powder

Citrus Aurantium Dulcis Flower/Leaf/Stem Powder

3.5

A gentle, natural powdered exfoliant from orange tree parts that adds mild texture and a light citrus scent to skincare products.

Irritation

low

Source

natural

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Exfoliant

Synthetic Ruby Powder

Synthetic Ruby Powder

3.8

A gentle, non-irritating physical exfoliant that polishes skin without the sharp edges of natural crystals.

Irritation

low

Source

synthetic

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Exfoliant

Tachibana Orange Peel Powder

Citrus Tachibana/Reticulata Peel Powder

3.8

A natural citrus peel powder that provides gentle physical exfoliation and a dose of antioxidants, but may cause irritation for sensitive skin.

Irritation

moderate

Source

natural

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Antioxidant

Tahitian Vanilla Seed

Vanilla Tahitensis Seed

3.8

Tahitian vanilla seed offers gentle exfoliation and antioxidant protection, but its benefits are less studied than those of more common vanilla extracts.

Irritation

low

Source

natural

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Exfoliant

Tangelo Fruit Powder

Citrus Tangelo Fruit Powder

3.8

A gentle, natural exfoliating powder from tangelo fruit that offers mild antioxidant benefits, best for those who prefer fruit-based skincare.

Irritation

low

Source

natural

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Exfoliant

Tangelo Peel Powder

Citrus Tangelo Peel Powder

3.8

A gentle, natural exfoliant that also delivers antioxidants from citrus peels, but its effectiveness and stability depend heavily on how it's processed and formulated.

Irritation

low

Source

natural

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Exfoliant

Tangerine Peel Powder

Citrus Reticulata Peel Powder

3.8

A gentle, natural physical exfoliant with antioxidant benefits, best suited for normal to combination skin types.

Irritation

low

Source

natural

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Exfoliant

Tartaric Acid

TARTARIC ACID

3.8

Tartaric acid is a gentle AHA exfoliant that helps smooth skin texture and brighten complexion, but it can cause irritation if overused.

Irritation

moderate

Source

natural

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Exfoliant

Thermus Thermophilus Ferment

Thermus Thermophilus Putative Esterase

4.0

A gentle enzyme exfoliant from a heat-loving microbe that helps soften and smooth skin without harsh scrubbing.

Irritation

low

Source

biotech

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Exfoliant

Thiolactic Acid

THIOLACTIC ACID

3.5

Thiolactic acid is a gentle exfoliant that may help smooth skin and reduce signs of aging, but research is still limited compared to better-studied AHAs.

Irritation

moderate

Source

synthetic

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Exfoliant

Thiosalicylic Acid

Thiosalicylic Acid

3.5

Thiosalicylic acid is a stronger, sulfur-based cousin of salicylic acid that may help with acne and exfoliation, but it can be more irritating and is less studied in cosmetics.

Irritation

moderate

Source

synthetic

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Exfoliant

Tiglic Acid

Tiglic Acid

3.5

Tiglic acid is a gentle exfoliating acid with antimicrobial potential, but research on its efficacy and safety in cosmetics is still limited.

Irritation

moderate

Source

natural

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Exfoliant

Tioxolone

Tioxolone

3.5

Tioxolone is a synthetic exfoliant with antimicrobial properties, but research on its effectiveness and safety is limited compared to more common ingredients like salicylic acid.

Irritation

moderate

Source

synthetic

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Abrasive

Topaz

Topaz

3.5

Topaz is a natural mineral used for gentle physical exfoliation, but its benefits are limited to texture and mild polishing.

Irritation

low

Source

natural

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Exfoliant

Torreya Seed Powder

Torreya Nucifera Seed Powder

3.8

A gentle, natural exfoliating powder that helps polish skin without harsh microbeads, but research on its benefits is still limited.

Irritation

low

Source

natural

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Exfoliant

Trans-2-Methylpent-2-Enoic Acid

TRANS-2-METHYLPENT-2-ENOIC ACID

3.8

A gentle, strawberry-derived acid that may help exfoliate and brighten skin with low irritation potential, but research is still limited.

Irritation

low

Source

natural

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Skin Conditioning Agent

Tridecyl Salicylate

TRIDECYL SALICYLATE

3.8

A gentle, oil-soluble salicylate ester that helps smooth skin texture without the irritation often linked to salicylic acid.

Irritation

low

Source

semi-synthetic

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Humectant

Trilactin

Trilactin

4.0

Trilactin is a gentle, hydrating exfoliant that helps smooth skin texture without the irritation often associated with stronger acids.

Irritation

low

Source

semi-synthetic

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Exfoliant

Trypsin

Trypsin

3.8

Trypsin is an enzyme exfoliant that gently dissolves dead skin cells, but it can be irritating if left on too long or used too frequently.

Irritation

moderate

Source

natural

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Humectant

Urea

Urea

4.5

Urea is a gentle, effective humectant and exfoliant that hydrates and smooths skin, but higher concentrations can cause stinging on sensitive or broken skin.

Irritation

low

Source

natural

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Exfoliant

Urea Peroxide

Urea Peroxide

3.5

Urea peroxide offers mild exfoliation and whitening effects but can be irritating, especially at higher concentrations.

Irritation

moderate

Source

synthetic

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Humectant

Urea-D-Glucuronic Acid

Urea-D-Glucuronic Acid

3.8

A mild dual-action ingredient that gently exfoliates and hydrates, suitable for most skin types.

Irritation

low

Source

semi-synthetic

beautyskincareexfolianthumectant
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Exfoliant

Vanilla Seed Powder

Vanilla Planifolia Seed Powder

3.8

Vanilla Seed Powder offers gentle physical exfoliation and antioxidant benefits, but its evidence is limited and it may not suit very sensitive skin.

Irritation

low

Source

natural

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Exfoliant

Vetiver Root Powder

VETIVERIA ZIZANOIDES ROOT POWDER

3.8

Vetiver root powder is a gentle, natural exfoliant with soothing and aromatic benefits, best suited for rinse-off products.

Irritation

low

Source

natural

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pH Adjuster

Vinegar

Acetum

3.8

Vinegar can gently exfoliate and balance skin pH, but it must be heavily diluted to avoid irritation.

Irritation

moderate

Source

natural

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Exfoliant

Virola Seed Powder

VIROLA SEBIFERA SEED POWDER

3.5

A gentle, natural seed powder that helps polish away dead skin cells without harsh microbeads.

Irritation

low

Source

natural

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Absorbent

Volcanic Ash

Volcanic Ash

3.8

Volcanic ash can help absorb excess oil and gently exfoliate, but its gritty texture may be too harsh for sensitive skin.

Irritation

moderate

Source

natural

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Exfoliant

Volcanic Rock

Volcanic Rock

3.8

Volcanic rock is a natural exfoliant that helps remove dead skin cells and absorb excess oil, but it can be too abrasive for sensitive skin if used too frequently.

Irritation

low

Source

natural

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Exfoliant

Walnut Shell Extract

Juglans Regia Shell Extract

3.5

A natural physical exfoliant that sloughs off dead skin cells, but can be too harsh for sensitive or acne-prone skin.

Irritation

moderate

Source

natural

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Abrasive

Walnut Shell Powder

JUGLANS REGIA (WALNUT) SHELL POWDER

3.5

Walnut shell powder is a natural physical exfoliant, but its irregular, sharp particles can cause micro-tears in the skin, making it a controversial choice for sensitive or acne-prone skin.

Irritation

moderate

Source

natural

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Exfoliant

Western Hemlock Bark Powder

Tsuga heterophylla bark powder

3.5

A natural, gentle exfoliating powder from tree bark that may also provide antioxidant benefits, but research on its specific skincare effects is limited.

Irritation

low

Source

natural

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Exfoliant

Wheat Bran

TRITICUM VULGARE BRAN

3.8

Wheat bran is a gentle, natural exfoliant that also helps absorb excess oil, but it may not suit those with gluten sensitivity or very dry skin.

Irritation

low

Source

natural

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Exfoliant

Wheat Germ Powder

Triticum Vulgare Germ Powder

3.8

A gentle, natural exfoliating powder that also provides skin-nourishing vitamins and minerals, but may not suit those with gluten sensitivity.

Irritation

low

Source

natural

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Exfoliant

Wild Strawberry Seed

Fragaria Vesca Seed

3.8

A gentle natural exfoliant with antioxidant benefits, but research on its skincare effects is still limited.

Irritation

low

Source

natural

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Exfoliant

Willow Bark Ferment Filtrate

Leuconostoc/Salix Alba Bark Extract Ferment Filtrate

4.0

A gentle, fermented alternative to salicylic acid that exfoliates while calming the skin.

Irritation

low

Source

biotech

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Humectant

Yogurt

YOGURT

3.8

Yogurt offers gentle exfoliation and hydration thanks to its natural lactic acid and probiotic content, but its benefits in skincare are modest and best for normal to dry skin types.

Irritation

low

Source

natural

beautyskincarehumectantexfoliant
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Exfoliant

Yogurt Filtrate

Yogurt Filtrate

4.0

A gentle, lactic acid-rich ferment that exfoliates and hydrates without the harshness of stronger acids.

Irritation

low

Source

natural

beautyskincareexfolianthumectant
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Antioxidant

Yuzu Ferment Filtrate

Citrus Junos Fruit/Sucrose Ferment Filtrate

4.0

A gentle fermented fruit extract that offers antioxidant protection and mild exfoliation, suitable for most skin types.

Irritation

low

Source

biotech

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Exfoliant

Yuzu Peel Ferment Filtrate

Saccharomyces/Citrus Junos Peel Ferment Filtrate

4.0

A gentle fermented yuzu peel extract that offers mild exfoliation and antioxidant benefits, ideal for sensitive skin.

Irritation

low

Source

biotech

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Exfoliant

Yuzu Peel Powder

Citrus Junos Peel Powder

4.0

Yuzu peel powder offers gentle physical exfoliation and antioxidant benefits, but its fine particle size and citrus origin may cause irritation for sensitive skin.

Irritation

moderate

Source

natural

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Absorbent

Zeolite

Zeolite

3.8

Zeolite is a gentle mineral that helps absorb excess oil and lightly exfoliate without harshness, making it a good option for oily or combination skin.

Irritation

low

Source

natural

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