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

Ribonolactone

Ribonolactone

4.0

A gentle PHA exfoliant that smooths skin and boosts hydration with minimal irritation, ideal for sensitive skin.

Irritation

low

Source

semi-synthetic

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Exfoliant

Rice Ferment (Acetobacter/Saccharomyces)

ACETOBACTER/SACCHAROMYCES/RICE KERNEL FERMENT

4.0

A gentle fermented rice ingredient that lightly exfoliates and hydrates, ideal for those seeking a mild alternative to stronger acids.

Irritation

low

Source

biotech

beautyskincareexfolianthumectant
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Humectant

Rice Ferment Extract

ASPERGILLUS/SACCHAROMYCES RICE FERMENT LEES

4.1

A gentle fermented rice ingredient that helps hydrate, brighten, and smooth skin without harsh exfoliation.

Irritation

low

Source

biotech

beautyskincarehumectantexfoliant
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Exfoliant

Rice Germ Powder

ORYZA SATIVA GERM POWDER

4.0

A gentle, natural exfoliant and antioxidant that helps smooth skin without harsh abrasion, ideal for sensitive skin types.

Irritation

low

Source

natural

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Exfoliant

Rice Hull Powder

ORYZA SATIVA HULL POWDER

4.0

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

Irritation

low

Source

natural

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Exfoliant

Rice Hull Vinegar

Rice Hull Vinegar

3.8

A mild, natural exfoliant and pH balancer that may help smooth skin and refine texture without harshness.

Irritation

low

Source

natural

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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

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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

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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

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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

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Abrasive

Ruby Extract

CORUNDUM (ALUMINUM OXIDE)

3.5

Ruby extract adds a touch of luxury to scrubs with gentle physical exfoliation, but its benefits are mostly aesthetic and not backed by strong research.

Irritation

moderate

Source

natural

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Abrasive

Ruby Powder

CORUNDUM (ALUMINUM OXIDE)

3.5

Ruby powder adds a gentle physical exfoliation and a subtle glow, but its benefits are mostly aesthetic and it may be too harsh for sensitive skin.

Irritation

moderate

Source

natural

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Humectant

Saccharomyces Rice Ferment Filtrate

SACCHAROMYCES/HYDROLYZED GERMINATED RICE GRAIN FERMENT FILTRATE

4.0

A gentle fermented rice ingredient that helps soften skin and improve texture without harsh exfoliation.

Irritation

low

Source

biotech

beautyskincarehumectantexfoliant
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Exfoliant

Safflower Flower Powder

CARTHAMUS TINCTORIUS FLOWER POWDER

3.8

A gentle, natural exfoliating powder from safflower petals that also adds a warm hue and antioxidant benefits to skincare products.

Irritation

low

Source

natural

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Exfoliant

Sakura Flower Powder

PRUNUS SPECIOSA (CHERRY) FLOWER POWDER

3.8

A gentle, natural exfoliant from cherry blossoms that can help smooth skin without harsh abrasion, but its benefits beyond texture are not well-studied.

Irritation

low

Source

natural

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Exfoliant

Salicin

Salicin

3.8

A gentle, plant-derived exfoliant that may help smooth skin and calm minor irritation, but it is less potent than salicylic acid.

Irritation

low

Source

natural

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Exfoliant

Salicylamide

Salicylamide

3.5

Salicylamide is a gentler cousin of salicylic acid that may help exfoliate and calm skin, but research on its cosmetic benefits is still limited.

Irritation

low

Source

synthetic

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Exfoliant

Salicylic Acid

Salicylic Acid

4.3

Salicylic acid is a well-studied BHA that exfoliates inside pores, making it a go-to for acne-prone and oily skin, but it can be drying if overused.

Irritation

moderate

Source

synthetic

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Exfoliant

Salicyloyl Beeswax

Salicyloyl Beeswax

3.8

A gentle exfoliating ingredient that combines the benefits of salicylic acid with the soothing properties of beeswax.

Irritation

low

Source

semi-synthetic

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Exfoliant

Salicyloylhydroxamic Acid

Salicyloylhydroxamic Acid

4.0

A gentle exfoliant that helps smooth skin and clear pores without the irritation often associated with salicylic acid.

Irritation

low

Source

synthetic

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Exfoliant

Salt Mine Mud

Salt Mine Mud

3.8

A mineral-rich mud that can help absorb excess oil and gently exfoliate, but may be too abrasive for sensitive skin.

Irritation

moderate

Source

natural

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Abrasive

Sand

SAND

3.5

Sand is a natural physical exfoliant that can smooth skin, but its rough texture may cause micro-tears if used too aggressively.

Irritation

moderate

Source

natural

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Exfoliant

Sandalwood Shell Powder

SANTALUM SPICATUM SHELL POWDER

3.8

A gentle, natural exfoliating powder from Australian sandalwood nut shells, best for physical scrubs and masks.

Irritation

low

Source

natural

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Exfoliant

Sandalwood Wood Powder

SANTALUM ALBUM WOOD POWDER

3.8

A gentle, natural exfoliating powder that can also help absorb excess oil and soothe the skin.

Irritation

low

Source

natural

beautyskincareexfoliant
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Exfoliant

Satsuma Mandarin Fruit Powder

Citrus Unshiu Fruit Powder

3.8

A gentle fruit powder that offers mild exfoliation and antioxidant benefits, but its effects are not as well-studied as more common citrus extracts.

Irritation

low

Source

natural

beautyskincareexfoliantantioxidant
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Exfoliant

Schinziophyton Kernel Powder

SCHINZIOPHYTON RAUTANENII KERNEL POWDER

3.8

A gentle, natural exfoliating powder from the Manketti tree kernel, ideal for physical scrubs and oil-absorbing masks.

Irritation

low

Source

natural

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Exfoliant

Schist Powder

SCHIST

3.5

Schist powder offers gentle physical exfoliation and oil absorption, but its particle size and shape can vary, so it may be too abrasive for sensitive skin.

Irritation

moderate

Source

natural

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Exfoliant

Sea Buckthorn Husk Powder

HIPPOPHAE RHAMNOIDES HUSK POWDER

4.0

A gentle, natural exfoliating powder rich in antioxidants, ideal for sensitive skin types looking for mild physical exfoliation.

Irritation

low

Source

natural

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Exfoliant

Sea Salt

MARIS SAL (SEA SALT)

3.8

Sea salt can be a gentle physical exfoliant and mineral source, but it may be drying or irritating for sensitive or dehydrated skin.

Irritation

moderate

Source

natural

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Exfoliant

Sea Silt

Sea Silt

3.8

Sea silt is a gentle, mineral-rich exfoliant that can help polish skin and absorb excess oil without harshness.

Irritation

low

Source

natural

beautyskincareexfoliantmineral
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Exfoliant

Serralysin

Serratia Peptidase

3.8

A gentle enzyme exfoliant that breaks down dead skin proteins without harsh scrubbing, but research in topical skincare is still limited.

Irritation

low

Source

biotech

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Exfoliant

Sesame Seed Powder

Sesamum Indicum Seed Powder

3.8

A gentle natural exfoliant that also helps absorb excess oil, but may feel gritty in some formulas.

Irritation

low

Source

natural

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Exfoliant

Shea Nut Shell Powder

Butyrospermum Parkii Nut Shell Powder

3.8

A gentle, natural exfoliating powder from shea nut shells, ideal for physical scrubs without harsh microplastics.

Irritation

low

Source

natural

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Exfoliant

Shikimic Acid

SHIKIMIC ACID

4.0

A gentle, plant-based AHA that exfoliates and provides antioxidant benefits, suitable for most skin types including sensitive skin.

Irritation

low

Source

natural

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Exfoliant

Silanediol Salicylate

SILANEDIOL SALICYLATE

4.0

A gentle exfoliant that pairs salicylic acid's pore-clearing power with silicon's soothing touch, ideal for sensitive or reactive skin.

Irritation

low

Source

semi-synthetic

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Abrasive

Silicon Carbide

SILICON CARBIDE

3.0

A powerful physical exfoliant that can smooth rough skin but may cause micro-tears if used too aggressively.

Irritation

high

Source

synthetic

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Abrasive

Sillimanite

Sillimanite

3.0

Sillimanite is a natural mineral abrasive that can physically exfoliate skin, but its use in cosmetics is uncommon and may be too harsh for sensitive skin.

Irritation

moderate

Source

natural

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Exfoliant

Silt

SILT

3.8

Silt is a gentle, mineral-rich sediment that helps exfoliate and absorb excess oil, but its benefits are largely anecdotal and depend on the source.

Irritation

low

Source

natural

beautyskincareexfoliantabsorbent
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Exfoliant

Silt Extract

Silt Extract

3.8

Silt extract offers gentle physical exfoliation and a dose of trace minerals, but its benefits are largely anecdotal and product-dependent.

Irritation

low

Source

natural

beautyskincareexfoliantmineral
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Antimicrobial

Silver Salicylate

Silver Salicylate

3.8

Silver salicylate offers a unique blend of antibacterial action and gentle exfoliation, but may cause irritation for sensitive skin and has limited long-term safety data.

Irritation

moderate

Source

semi-synthetic

beautyskincareantimicrobialexfoliant
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pH Adjuster

Sodium Glycolate

Sodium Glycolate

3.8

Sodium Glycolate is a gentler, salt form of glycolic acid that helps exfoliate and adjust product pH, but may still cause irritation in sensitive skin.

Irritation

moderate

Source

synthetic

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Exfoliant

Sodium Glyoxylate

Sodium Glyoxylate

3.5

Sodium Glyoxylate is a gentle exfoliant that helps smooth skin texture and improve radiance, but research on its long-term effects is still limited.

Irritation

moderate

Source

synthetic

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Exfoliant

Sodium Salicylate

Sodium Salicylate

4.0

A milder, water-soluble form of salicylic acid that gently exfoliates and helps keep products fresh.

Irritation

low

Source

synthetic

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Exfoliant

Soursop Seedcake Powder

Annona Muricata Seedcake Powder

3.5

A gentle, natural powdered exfoliant from soursop seeds, but research on its skincare benefits is still limited.

Irritation

moderate

Source

natural

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Exfoliant

Soy Fiber

Glycine Soja Fiber

3.8

Soy fiber is a gentle, natural exfoliant that helps smooth skin without harsh microbeads, but it may not suit very sensitive or acne-prone skin if left on.

Irritation

low

Source

natural

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Exfoliant

Soy Flour

Glycine Soja Flour

3.8

Soy Flour is a gentle, natural exfoliant that also helps soothe and condition the skin, making it a good choice for sensitive skin types.

Irritation

low

Source

natural

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Exfoliant

Soy Seed Powder

Glycine Soja Seed Powder

4.0

A natural, gentle exfoliant that polishes skin without harsh microbeads, suitable for most skin types.

Irritation

low

Source

natural

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Exfoliant

Sponge

Sponge

3.5

Sponge is a gentle physical exfoliant and cleansing tool, but its effectiveness and safety depend on material and hygiene.

Irritation

low

Source

natural

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Exfoliant

Sprout Extract

Sprout Extract

4.0

A gentle, plant-based exfoliant that helps smooth skin texture and promote a more even tone without harsh scrubbing.

Irritation

low

Source

natural

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Exfoliant

Spruce Bark Powder

Picea Mariana Bark Powder

3.8

A gentle, natural exfoliating powder from spruce bark that also provides antioxidant benefits, but research on its specific cosmetic effects is limited.

Irritation

low

Source

natural

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Exfoliant

Strawberry Fruit Powder

FRAGARIA ANANASSA FRUIT POWDER

3.8

Strawberry fruit powder offers gentle physical exfoliation and antioxidant benefits, but its effectiveness depends on particle size and formulation.

Irritation

low

Source

natural

beautyskincareexfoliantantioxidant
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Exfoliant

Subtilisin

SUBTILISIN

3.8

Subtilisin is a gentle enzyme exfoliant that dissolves dead skin cells, but it can be irritating for sensitive skin if left on too long.

Irritation

moderate

Source

biotech

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Exfoliant

Succinic Acid

Succinic Acid

4.0

A gentle, multi-tasking acid that exfoliates, calms redness, and helps control acne-causing bacteria without the sting of stronger acids.

Irritation

low

Source

natural

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Exfoliant

Sugarcane Extract

Saccharum Spontaneum Extract

4.0

A gentle plant-derived exfoliant that helps smooth skin and improve radiance without harsh irritation.

Irritation

low

Source

natural

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Humectant

Sugarcane Ferment Extract

Saccharum Officinarum Ferment Extract

4.0

A gentle, naturally-derived exfoliant and hydrator that helps smooth skin texture without harshness.

Irritation

low

Source

natural

beautyskincarehumectantexfoliant
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Exfoliant

Sunflower Gamma-Lactone

Helianthus Annuus (Sunflower) Seed Oil Gamma-Lactone

4.0

A gentle, plant-derived exfoliant that helps smooth skin texture without the sting of stronger acids.

Irritation

low

Source

natural

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Exfoliant

Sunflower Seed Flour

Helianthus Annuus Seed Flour

4.0

A gentle, natural exfoliant that helps remove dead skin cells without harsh microbeads, suitable for most skin types.

Irritation

low

Source

natural

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Exfoliant

Sunflower Seedcake

Helianthus Annuus Seedcake

3.8

A gentle, natural exfoliant from sunflower seeds that also delivers skin-conditioning fatty acids and proteins.

Irritation

low

Source

natural

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Abrasive

Sunstone Powder

Sunstone Powder

3.5

Sunstone powder adds a natural sparkle and gentle physical exfoliation, but its sharp edges can be irritating for sensitive skin.

Irritation

moderate

Source

natural

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