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 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

10-Hydroxystearic Acid

10-HYDROXYSTEARIC ACID

4.0

A gentle, non-irritating exfoliating acid that helps smooth skin texture without the sting of stronger acids.

Irritation

low

Source

semi-synthetic

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Exfoliant

3-Aminopropane Sulfonic Acid

3-AMINOPROPANE SULFONIC ACID

3.8

A gentle, less-studied exfoliant that may help smooth skin texture with minimal irritation, but lacks the extensive research of AHAs or BHAs.

Irritation

low

Source

synthetic

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Exfoliant

3-Hydroxybenzoic Acid

3-HYDROXYBENZOIC ACID

3.5

A gentle exfoliating acid that may help smooth skin texture with minimal irritation, but research is still limited.

Irritation

low

Source

synthetic

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Exfoliant

Abalone Shell Powder

ABALONE SHELL POWDER

3.5

A natural exfoliant from abalone shells that gently polishes skin but has limited research and may be too abrasive for sensitive skin.

Irritation

moderate

Source

natural

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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

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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

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Exfoliant

Acidophilus Grape Ferment

ACIDOPHILUS/GRAPE FERMENT

4.0

A gentle fermented ingredient that combines probiotic activity with grape-derived antioxidants to support smoother, brighter skin.

Irritation

low

Source

biotech

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Exfoliant

Acronychia Acidula Fruit Powder

Acronychia Acidula Fruit Powder

3.8

A gentle, natural fruit powder that provides mild exfoliation and antioxidant benefits, but research is limited.

Irritation

low

Source

natural

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Exfoliant

Adzuki Bean Seed Extract

Phaseolus aconitifolius seed extract

3.8

A gentle, natural exfoliant from adzuki beans that helps smooth skin without harsh chemicals, but research on its benefits is still limited.

Irritation

low

Source

natural

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Absorbent

Agave Leaf Powder

Agave Americana Leaf Powder

3.8

Agave leaf powder is a gentle, plant-based exfoliant and absorbent that can help mattify skin and lightly polish away dead cells without harshness.

Irritation

low

Source

natural

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Exfoliant

Aleuritic Acid

ALEURITIC ACID

3.8

A gentle, plant-derived exfoliant that helps brighten skin and even out tone without the irritation of stronger acids.

Irritation

low

Source

natural

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Exfoliant

Alfalfa Leaf Powder

MEDICAGO SATIVA LEAF POWDER

3.8

A gentle, nutrient-rich botanical powder that provides mild physical exfoliation and may offer antioxidant benefits, but its effects are not well-studied in skincare.

Irritation

low

Source

natural

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Exfoliant

Alfalfa Seed Powder

Medicago Sativa Seed Powder

3.8

A natural, gentle exfoliating powder that also provides antioxidant properties, but research on its skincare benefits is still limited.

Irritation

low

Source

natural

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Exfoliant

Alluvial Mud

Alluvial Mud

3.5

Alluvial mud is a gentle, mineral-rich sediment that can help absorb excess oil and lightly exfoliate skin, but its benefits are mostly anecdotal.

Irritation

low

Source

natural

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Exfoliant

Almond Seedcoat Powder

Prunus Amygdalus Dulcis Seedcoat Powder

4.0

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

Irritation

low

Source

natural

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Exfoliant

Alpha Hydroxy Acid (AHA) Blend

Alpha-Hydroxy Acids

4.2

Alpha hydroxy acids are effective exfoliants that smooth skin texture and boost radiance, but require careful use to avoid irritation.

Irritation

moderate

Source

natural

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Exfoliant

Alpinia Intermedia Seed Powder

Alpinia Intermedia Seed Powder

3.5

A gentle, natural powdered exfoliant with antioxidant potential, but research is limited and it may not suit very sensitive skin.

Irritation

low

Source

natural

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Exfoliant

Aminopeptidase

Aminopeptidase

3.8

Aminopeptidase is a gentle enzyme exfoliant that helps smooth skin by breaking down dead surface proteins, but it is less common and less studied than other exfoliating enzymes.

Irritation

low

Source

biotech

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Exfoliant

Ammonium Glycolate

AMMONIUM GLYCOLATE

4.0

A milder form of glycolic acid that exfoliates and smooths skin with less sting, but still requires sun protection and gradual introduction.

Irritation

moderate

Source

synthetic

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Humectant

Ammonium Lactate

Ammonium Lactate

4.0

Ammonium lactate is a milder, less acidic alternative to straight lactic acid that hydrates and gently exfoliates, making it suitable for dry or sensitive skin.

Irritation

low

Source

semi-synthetic

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Exfoliant

Amylase

AMYLASE

3.8

Amylase is a gentle enzyme exfoliant that dissolves dead skin cells by breaking down surface starches, making skin smoother without harsh scrubbing.

Irritation

low

Source

biotech

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Exfoliant

Amyloglucosidase

Amyloglucosidase

4.0

A gentle enzyme exfoliant that dissolves dead skin cells without scrubbing, ideal for sensitive skin.

Irritation

low

Source

biotech

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Abrasive

Anadara Shell Powder

ANADARA KAGOSHIMENSIS SHELL POWDER

3.5

A natural exfoliant from clam shells that gently polishes skin, but may be too scratchy for sensitive or compromised skin.

Irritation

moderate

Source

natural

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Exfoliant

Andiroba Seed Powder

Carapa guaianensis seed powder

3.8

A gentle, natural seed powder that helps exfoliate and absorb excess oil without harshness, but research on its specific benefits is still limited.

Irritation

low

Source

natural

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Exfoliant

Apple Carpel Powder

Pyrus Malus Carpel Powder

3.8

A gentle, natural exfoliant from apple cores that helps smooth skin without harsh microbeads.

Irritation

low

Source

natural

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Exfoliant

Apple Fiber

Pyrus Malus Fiber

4.0

Apple fiber is a gentle, natural exfoliant that helps slough off dead skin cells without the harshness of plastic microbeads, making it a popular eco-friendly choice for scrubs and masks.

Irritation

low

Source

natural

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Antioxidant

Apple Fruit Extract

Pyrus Malus Fruit Extract

4.0

Apple fruit extract is a gentle, antioxidant-rich ingredient that offers mild exfoliation and hydration, making it a good choice for most skin types.

Irritation

low

Source

natural

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Exfoliant

Apricot Seed Powder

Prunus Armeniaca Seed Powder

3.8

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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Exfoliant

Aquamarine Powder

Aquamarine Powder

3.5

A gentle, natural exfoliant from crushed gemstone, but its benefits beyond physical scrubbing are not well-supported by research.

Irritation

moderate

Source

natural

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Exfoliant

Arabica Coffee Fruit Powder

Coffea Arabica Fruit Powder

4.0

A gentle, antioxidant-rich natural exfoliant from coffee fruit that helps smooth skin without harsh microbeads.

Irritation

low

Source

natural

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Exfoliant

Arabica Coffee Seed Powder

Coffea Arabica Seed Powder

4.0

A gentle, natural physical exfoliant with antioxidant benefits from coffee, but may be too gritty for sensitive skin if not finely ground.

Irritation

low

Source

natural

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Exfoliant

Araucaria Nut Shell Powder

ARAUCARIA ANGUSTIFOLIA NUT SHELL POWDER

3.5

A gentle, natural exfoliating powder from nut shells, best for physical scrubs but with limited research on its specific benefits.

Irritation

low

Source

natural

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Exfoliant

Araucaria Seed Powder

ARAUCARIA ANGUSTIFOLIA SEED POWDER

3.8

A gentle, natural exfoliating powder from the seeds of the Brazilian pine tree, suitable for physical scrubs without harsh microbeads.

Irritation

low

Source

natural

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Exfoliant

Argan Shell Powder

Argania Spinosa Shell Powder

3.8

A gentle, natural exfoliant that sloughs off dead skin cells without harsh microplastics, but may feel gritty for sensitive skin.

Irritation

low

Source

natural

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Exfoliant

Australian Sandalwood Fruit Powder

SANTALUM ACUMINATUM FRUIT POWDER

3.8

A gentle, natural exfoliating powder from Australian sandalwood fruit, best for those who prefer plant-based scrubs over synthetic beads.

Irritation

low

Source

natural

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Exfoliant

Azeloyl Diethyl Salicylate

Azeloyl Diethyl Salicylate

4.0

A gentle hybrid of azelaic and salicylic acids that aims to brighten skin and smooth texture with less irritation than either parent ingredient alone.

Irritation

moderate

Source

semi-synthetic

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Exfoliant

Azuki Bean Powder

Phaseolus angularis seed powder

3.8

A gentle, natural exfoliant from azuki beans that helps polish skin without harsh microbeads.

Irritation

low

Source

natural

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Exfoliant

Babassu Seed Powder

Orbignya Phalerata Seed Powder

4.0

A gentle, natural exfoliating powder from babassu palm seeds that buffs away dead skin without harsh microbeads.

Irritation

low

Source

natural

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Exfoliant

Bacillus Licheniformis Keratinase

Bacillus Licheniformis Keratinase

4.0

A gentle enzymatic exfoliant that dissolves dead skin cells without harsh scrubbing, but may irritate sensitive skin if overused.

Irritation

moderate

Source

biotech

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Exfoliant

Bacillus Rice Ferment Filtrate

BACILLUS/RICE FERMENT LEES FERMENT FILTRATE

4.0

A gentle fermented ingredient that helps soften and smooth skin without harsh scrubbing, ideal for those new to exfoliation.

Irritation

low

Source

biotech

beautyskincareexfoliantconditioning agent
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Exfoliant

Bamboo Stem Powder

PHYLLOSTACHYS NIGRA STEM POWDER

3.8

A gentle, natural physical exfoliant from bamboo stems that helps smooth skin without harsh microbeads.

Irritation

low

Source

natural

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Exfoliant

Baobab Seed Powder

Adansonia Digitata Seed Powder

3.8

A gentle, natural powder that helps exfoliate and absorb excess oil without harsh microbeads.

Irritation

low

Source

natural

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Exfoliant

Barley Powder

Hordeum Vulgare Powder

3.8

Barley powder is a gentle, natural exfoliant that helps remove dead skin cells and absorb excess oil without harshness.

Irritation

low

Source

natural

beautyskincareexfoliantabsorbent
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Exfoliant

Barley Seed Flour

Hordeum Vulgare Seed Flour

3.8

Barley Seed Flour is a natural, gentle exfoliant that helps remove dead skin cells and absorb excess oil without harshness.

Irritation

low

Source

natural

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Exfoliant

Benzilic Acid

Benzilic Acid

3.5

Benzilic acid is a lesser-known AHA that may offer gentle exfoliation and brightening, but research is limited compared to glycolic or lactic acid.

Irritation

moderate

Source

synthetic

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Exfoliant

Betaine Salicylate

Betaine Salicylate

4.0

A gentler cousin of salicylic acid that exfoliates and unclogs pores with less irritation, ideal for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

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Exfoliant

Bilberry Seedcake Powder

VACCINIUM MYRTILLUS SEEDCAKE POWDER

4.0

A natural, gentle exfoliating powder rich in antioxidants that helps smooth skin without harsh microbeads.

Irritation

low

Source

natural

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Exfoliant

Birch Wood Powder

Betula Pendula Wood Powder

3.8

A gentle, natural exfoliating powder that helps smooth skin without harsh microbeads, but may feel gritty in some formulations.

Irritation

low

Source

natural

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Exfoliant

Bitter Orange Peel Powder

Citrus Aurantium Amara Peel Powder

3.8

A gentle physical exfoliant with antioxidant benefits, but can be drying or irritating for sensitive skin due to its citrus origin.

Irritation

moderate

Source

natural

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Exfoliant

Black Mustard Seed Powder

Brassica Nigra Seed Powder

3.8

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

Irritation

moderate

Source

natural

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Exfoliant

Black Pepper Fruit Powder

Piper Nigrum Fruit Powder

3.8

A natural, gritty powder that physically exfoliates skin but can be irritating for sensitive or broken skin due to its spice content.

Irritation

moderate

Source

natural

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Exfoliant

Black Walnut Shell Extract

Juglans Nigra Shell Extract

3.5

A natural physical exfoliant from walnut shells, effective for sloughing off dead skin but can be too harsh for sensitive or acne-prone skin.

Irritation

moderate

Source

natural

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Exfoliant

Blackberry Seed

Rubus Fruticosus Seed

3.8

Blackberry seed provides gentle physical exfoliation and skin-softening fatty acids, but its small particle size may feel gritty for some.

Irritation

low

Source

natural

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Exfoliant

Brazil Nut Seed Powder

BERTHOLLETIA EXCELSA SEED POWDER

3.8

A natural, gentle exfoliating powder that helps smooth skin without harsh microbeads, but may be too gritty for sensitive skin if particles are large.

Irritation

low

Source

natural

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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

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Exfoliant

Buttermilk Extract Powder

Buttermilk Extract

4.0

A mild, milk-based exfoliant that gently sloughs dead skin cells and supports a smoother, more even complexion.

Irritation

low

Source

natural

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Exfoliant

Cade Wood Powder

Juniperus Oxycedrus Wood Powder

3.5

A natural wood powder that gently exfoliates and absorbs excess oil, but may feel gritty and can be drying for sensitive skin.

Irritation

moderate

Source

natural

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Antioxidant

Caffeine Salicylate

Caffeine Salicylate

3.8

Caffeine Salicylate blends the energizing effects of caffeine with the exfoliating power of salicylic acid, offering a dual-action ingredient for dull or congested skin.

Irritation

moderate

Source

semi-synthetic

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