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

Limonia Acidissima Shell Powder

LIMONIA ACIDISSIMA SHELL POWDER

3.5

A natural, gritty powder that physically exfoliates skin, but its coarse texture may be too harsh for sensitive or compromised skin.

Irritation

moderate

Source

natural

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Exfoliant

Limonia Acidissima Wood Powder

Limonia Acidissima Wood Powder

3.5

A gentle, natural wood powder that helps slough off dead skin and absorb excess oil, but lacks strong clinical research.

Irritation

low

Source

natural

beautyskincareexfoliantabsorbent
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Exfoliant

Lipase

Lipase

3.8

Lipase is a gentle enzyme exfoliant that breaks down sebum and dead skin cells, making it ideal for oily or congested skin without harsh scrubbing.

Irritation

low

Source

biotech

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Exfoliant

Loofah Extract

Luffa Operculata Extract

3.8

A gentle plant-based exfoliant that helps smooth skin without harsh scrubbing, but research on its benefits is still limited.

Irritation

low

Source

natural

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Exfoliant

Loquat Seed Powder

ERIOBOTRYA JAPONICA SEED POWDER

3.8

A gentle, natural exfoliating powder from loquat seeds, best for physical scrubs and masks, but research on its skincare benefits is still limited.

Irritation

low

Source

natural

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Exfoliant

Lotus Seed Powder

NELUMBO NUCIFERA SEED POWDER

3.8

A gentle, natural exfoliating powder with antioxidant properties, best suited for rinse-off products like masks and scrubs.

Irritation

low

Source

natural

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Exfoliant

Lowbush Blueberry Seed

VACCINIUM ANGUSTIFOLIUM SEED

4.0

A gentle, natural exfoliant from blueberry seeds that also provides antioxidant benefits, best suited for rinse-off products.

Irritation

low

Source

natural

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Exfoliant

Luffa Cylindrica

Luffa Cylindrica

3.8

Luffa cylindrica is a natural exfoliant that gently buffs away dead skin cells, but it can be too abrasive for sensitive skin if used too aggressively.

Irritation

moderate

Source

natural

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Exfoliant

Luffa Fruit Powder

Luffa Cylindrica Fruit Powder

4.0

A gentle, natural physical exfoliant from the luffa gourd, but can be too abrasive for sensitive or compromised skin.

Irritation

moderate

Source

natural

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Exfoliant

Lychee Seed Powder

Litchi Chinensis Seed Powder

3.8

Lychee seed powder offers gentle physical exfoliation and oil absorption, but research on its specific skincare benefits is limited compared to more studied exfoliants.

Irritation

low

Source

natural

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Exfoliant

Lysine Azelate

Lysine Azelate

4.0

A gentle, less-irritating form of azelaic acid that helps brighten skin and smooth texture without the typical stinging.

Irritation

low

Source

semi-synthetic

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Exfoliant

Macadamia Shell Powder

MACADAMIA TERNIFOLIA SHELL POWDER

3.8

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

Irritation

low

Source

natural

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Exfoliant

Magnesium Salicylate

Magnesium Salicylate

3.8

A milder cousin of salicylic acid that exfoliates and calms skin, making it a good option for sensitive or reactive skin types.

Irritation

low

Source

synthetic

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Exfoliant

Maleic Acid

MALEIC ACID

2.5

Maleic acid is a potent but harsh exfoliant rarely used in consumer skincare due to high irritation potential; safer AHAs like glycolic or lactic acid are preferred.

Irritation

high

Source

synthetic

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Exfoliant

Malic Acid

Malic Acid

4.0

Malic acid is a gentle AHA exfoliant that helps smooth skin texture and brighten complexion, but it can cause irritation if used too frequently or at high concentrations.

Irritation

moderate

Source

natural

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pH Adjuster

Malonic Acid

Malonic Acid

3.5

Malonic acid is a mild exfoliant and pH adjuster, but research on its skincare benefits is still emerging.

Irritation

moderate

Source

synthetic

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Exfoliant

Maltobionic Acid

Maltobionic Acid

4.3

A mild, hydrating exfoliant ideal for sensitive skin, offering gentle surface renewal without the sting of stronger acids.

Irritation

low

Source

natural

beautyskincareexfolianthumectant
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Abrasive

Manchurian Walnut Shell Powder

Juglans Mandshurica Shell Powder

3.8

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

Irritation

moderate

Source

natural

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Exfoliant

Mandarin Peel Powder

Citrus Nobilis Peel Powder

3.8

Mandarin Peel Powder offers gentle physical exfoliation with antioxidant benefits, but its gritty texture and potential for irritation mean it's best suited for occasional use in rinse-off products.

Irritation

moderate

Source

natural

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Exfoliant

Mandelic Acid

Mandelic Acid

4.2

A gentle AHA that exfoliates and brightens skin with less irritation than glycolic acid, making it ideal for sensitive or darker skin tones.

Irritation

low

Source

natural

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Exfoliant

Margarita Powder

Margarita Powder

3.0

A fun, fragrant exfoliant blend for body scrubs, but its high salt content can be drying and irritating for sensitive skin.

Irritation

moderate

Source

mixed

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Exfoliant

Marula Seed Powder

SCLEROCARYA BIRREA SEED POWDER

4.0

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

Irritation

low

Source

natural

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Exfoliant

Meadowfoam Delta-Lactone

Meadowfoam Delta-Lactone

4.3

A mild, plant-based exfoliant derived from meadowfoam seed oil that gently resurfaces skin without the sting of stronger acids.

Irritation

low

Source

natural

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Exfoliant

Mevalonolactone

MEVALONOLACTONE

4.0

Mevalonolactone is a mild PHA exfoliant that gently smooths skin without the irritation of stronger acids, making it a good choice for sensitive skin.

Irritation

low

Source

synthetic

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Abrasive

Mineral & Shell Complex

Calcium Carbonate, Calcium Hydroxide, Calcium Oxide, Clay, Illite, Orthoclase, Oyster Shell Powder, Quartz Powder, Vermiculite, Zeolite Extract

3.5

A natural mineral blend that gently exfoliates and absorbs excess oil, but may be too abrasive for sensitive skin.

Irritation

moderate

Source

natural

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Exfoliant

Moringa Fruit Powder

Moringa Oleifera Fruit Powder

4.0

A gentle, natural exfoliating powder packed with antioxidants that can help polish skin without harsh microbeads.

Irritation

low

Source

natural

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Exfoliant

Morning Glory Seed Powder

Ipomoea hederacea seed powder

3.5

A gentle, natural exfoliant from morning glory seeds, but research on its safety and efficacy is limited.

Irritation

moderate

Source

natural

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Exfoliant

Mudstone Powder

Mudstone Powder

3.8

Mudstone powder is a natural, gentle physical exfoliant that helps remove dead skin and absorb excess oil without harsh chemicals.

Irritation

low

Source

natural

beautyskincareexfoliantabsorbent
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Antioxidant

Multi-Fruit & Veggie Ferment Extract

Zygosaccharomyces/Apple Fruit/Papaya Fruit/Pineapple Fruit/Acerola Fruit/Averrhoa Carambola Fruit/Musa Acuminata Fruit/Carrot Root/Radish Root/Tomato Fruit/Cucumber Fruit/Spinach Leaf/Perilla Frutescens Leaf/Aloe Arborescens Leaf/Laminaria Digitata Ferment Extract Filtrate

4.0

A gentle, antioxidant-rich ferment that lightly exfoliates and nourishes, but its complex sourcing makes it hard to standardize.

Irritation

low

Source

biotech

beautyskincareantioxidantexfoliant
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Exfoliant

Multi-Fruit Ferment Complex

HANSENULA/KLOECKERA/LACTOBACILLUS/LACTOCOCCUS/LEUCONOSTOC/PEDIOCOCCUS/SACCHAROMYCES/FIG/LEMON FERMENT

4.0

A gentle, fermented blend that helps exfoliate and nourish skin without harsh chemicals.

Irritation

low

Source

biotech

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Exfoliant

Multi-Fruit Ferment Filtrate

SACCHAROMYCES/CUCUMIS MELO FRUIT/FRAGARIA CHILOENSIS FRUIT/VITIS VINIFERA FRUIT/AKEBIA QUINATA FRUIT/PYRUS MALUS FRUIT/FICUS CARICA FRUIT/MUSA PARADISIACA FRUIT/SUCROSE FERMENT FILTRATE

4.0

A gentle fermented fruit blend that lightly exfoliates and provides antioxidant benefits, ideal for most skin types.

Irritation

low

Source

biotech

beautyskincareexfoliantantioxidant
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Exfoliant

Multi-Strain Milk Ferment Filtrate

LACTOBACILLUS/LEUCONOSTOC/ACETOBACTER/KLUYVEROMYCES/SACCHAROMYCES MILK FERMENT FILTRATE

4.0

A gentle, multi-strain milk ferment that exfoliates and hydrates without harshness, ideal for sensitive skin looking for a mild glow.

Irritation

low

Source

biotech

beautyskincareexfolianthumectant
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Exfoliant

Murraya Exotica Wood Powder

MURRAYA EXOTICA WOOD POWDER

3.5

A natural, gentle exfoliating powder from wood, best for those seeking plant-based physical exfoliation with minimal irritation risk.

Irritation

low

Source

natural

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Exfoliant

Murumuru Seed Powder

Astrocaryum Murumuru Seed Powder

3.8

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

Irritation

low

Source

natural

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Emollient

Myristyl Salicylate

Myristyl Salicylate

4.0

A milder cousin of salicylic acid that helps smooth skin without the sting, ideal for sensitive or dry skin types.

Irritation

low

Source

synthetic

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Exfoliant

Niacinamide Glycolate

Niacinamide Glycolate

4.0

A gentle exfoliating and brightening ingredient that pairs niacinamide with glycolic acid for smoother, more even-toned skin with less sting.

Irritation

low

Source

semi-synthetic

beautyskincareexfoliantbrightening
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Humectant

Niacinamide Lactate

Niacinamide Lactate

4.3

A gentle dual-action ingredient that combines niacinamide's barrier support with lactic acid's mild exfoliation for smoother, brighter skin.

Irritation

low

Source

semi-synthetic

beautyskincarehumectantexfoliant
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Exfoliant

Niacinamide Mandelate

Niacinamide Mandelate

4.3

A gentle, dual-action ingredient that exfoliates and supports the skin barrier without the irritation of standalone acids.

Irritation

low

Source

semi-synthetic

beautyskincareexfolianthumectant
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Exfoliant

Niacinamide Salicylate

Niacinamide Salicylate

4.0

A gentle exfoliating and brightening hybrid that pairs the pore-clearing power of salicylic acid with the soothing, barrier-supporting benefits of niacinamide.

Irritation

low

Source

semi-synthetic

beautyskincareexfoliantbrightening agent
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Exfoliant

Nigella Damascena Seed Powder

NIGELLA DAMASCENA SEED POWDER

3.8

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

Irritation

low

Source

natural

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Exfoliant

Noni Seed Powder

Morinda Citrifolia Seed Powder

3.8

A gentle physical exfoliant from noni seeds, but research on its skincare benefits is still limited.

Irritation

moderate

Source

natural

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Exfoliant

Nutmeg Fruit Powder

MYRISTICA FRAGRANS FRUIT POWDER

3.8

Nutmeg Fruit Powder offers gentle physical exfoliation and antioxidant benefits, but its coarse texture and potential for irritation mean it's best used with care in rinse-off products.

Irritation

moderate

Source

natural

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Exfoliant

Nutmeg Powder

MYRISTICA FRAGRANS POWDER

3.5

Nutmeg powder offers gentle physical exfoliation and a warm, spicy scent, but can irritate sensitive skin if used too frequently or in high amounts.

Irritation

moderate

Source

natural

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Exfoliant

Nutmeg Shell Powder

MYRISTICA FRAGRANS SHELL POWDER

3.8

A natural, gritty powder that buffs away dead skin cells, but may be too harsh for sensitive or acne-prone skin.

Irritation

moderate

Source

natural

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Exfoliant

Oat Hull Fiber

Avena Sativa Hull Fiber

3.8

A gentle, natural exfoliant from oat hulls that polishes skin without harsh microbeads, ideal for sensitive skin types.

Irritation

low

Source

natural

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Soothing Agent

Oat Kernel Flour

Avena Sativa (Oat) Kernel Flour

4.5

Oat kernel flour is a gentle, soothing ingredient ideal for sensitive or irritated skin, offering mild exfoliation and moisture retention.

Irritation

low

Source

natural

beautyskincaresoothing agentexfoliant
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Absorbent

Oat Kernel Meal

Avena Sativa (Oat) Kernel Meal

4.5

A gentle, natural exfoliant and skin soother that's especially kind to sensitive and dry skin types.

Irritation

low

Source

natural

beautyskincareexfoliantsoothing
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Exfoliant

Olive Husk Powder

Olea Europaea Husk Powder

3.8

A gentle, natural physical exfoliant that polishes skin without harsh microplastics, but may feel too gritty for sensitive skin.

Irritation

low

Source

natural

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Exfoliant

Olive Seed Powder

Olea Europaea Seed Powder

3.8

A gentle, natural physical exfoliant that polishes skin without harsh microplastics, but may feel too gritty for sensitive skin.

Irritation

low

Source

natural

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Exfoliant

Orange Fruit Powder

Citrus Aurantium Dulcis Fruit Powder

3.8

A gentle, natural exfoliant with antioxidant properties, best for those who prefer fruit-based skincare over synthetic beads or harsh acids.

Irritation

low

Source

natural

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Exfoliant

Orange Peel Powder

CITRUS AURANTIUM DULCIS PEEL POWDER

3.8

A natural, gentle exfoliant with antioxidant benefits, but may cause irritation for sensitive skin due to citrus oils and coarse texture.

Irritation

moderate

Source

natural

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Exfoliant

Oxosuccinic Acid

Oxosuccinic Acid

3.8

Oxosuccinic acid is a gentle alpha-keto acid exfoliant that may help brighten skin and support antioxidant defenses, but research is still emerging.

Irritation

moderate

Source

natural

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Exfoliant

Oyster Shell Extract

Ostrea Shell Extract

3.8

A gentle, natural exfoliant rich in calcium and trace minerals, best for those seeking a mild physical scrub without harsh microbeads.

Irritation

low

Source

natural

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Abrasive

Oyster Shell Powder

Ostrea Shell Powder

3.5

Oyster shell powder is a natural, mineral-rich exfoliant, but its sharp particles can be harsh on sensitive skin.

Irritation

moderate

Source

natural

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Exfoliant

Pancreatin

PANCREATIN

3.5

Pancreatin is a gentle enzyme exfoliant that helps soften and smooth skin by breaking down dead skin cells, but it's less common and less studied than other exfoliating enzymes.

Irritation

low

Source

natural

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Exfoliant

Papain

Papain

4.0

Papain is a gentle enzyme exfoliant from papaya that helps soften and smooth skin by dissolving dead cells, but it can be irritating for sensitive skin if overused.

Irritation

moderate

Source

natural

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Exfoliant

Papain Beta-Glucan

Papain, Beta-Glucan

3.8

A dual-action ingredient that gently exfoliates dead skin cells while helping to calm and hydrate the skin.

Irritation

moderate

Source

mixed

beautyskincareexfolianthumectant
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Exfoliant

Papain Crosspolymer

Carbomer/Papain Crosspolymer

4.0

A gentle enzyme exfoliant that helps smooth skin without harsh scrubbing, but may not be suitable for very sensitive or compromised skin.

Irritation

low

Source

semi-synthetic

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