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 20,303
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

Film Former

Sulfonated Polyester Copolymer

TEREPHTHALIC ACID/ISOPHTHALIC ACID/SODIUM ISOPHTHALIC ACID SULFONATE/GLYCOL COPOLYMER

4.0

A reliable film-former that helps makeup and sunscreen stay put longer without feeling heavy.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Antioxidant

Sulforaphane

Sulforaphane

4.0

A powerful plant-derived antioxidant that helps protect skin from environmental damage and may support a more even skin tone.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antibacterial

Sulfur

Sulfur

4.0

Sulfur is a time-tested acne-fighting ingredient that works by killing bacteria and gently exfoliating dead skin, but it can be drying and has a distinct smell.

Irritation

moderate

Source

natural

beautyskincareacne treatment
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Hair conditioning agent

Sulfurized Hydrolyzed Corn Protein

SULFURIZED HYDROLYZED CORN PROTEIN

3.8

A gentle, protein-based ingredient that strengthens hair and forms a protective film, but may not suit protein-sensitive hair types.

Irritation

low

Source

semi-synthetic

beautyskincarehaircareconditioning agent
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Film Former

Sulfurized Hydrolyzed Zein

SULFURIZED HYDROLYZED ZEIN

3.5

A modified corn protein that may help strengthen hair and form a protective film on skin, but research is limited.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
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Antimicrobial

Sulfurized Jojoba Oil

SIMMONDSIA CHINENSIS (JOJOBA) SEED OIL, SULFUR

3.8

Sulfurized jojoba oil combines the moisturizing benefits of jojoba with sulfur's antimicrobial power, making it a targeted option for acne-prone skin, though it may cause irritation for some.

Irritation

moderate

Source

semi-synthetic

beautyskincareacne treatment
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Fragrance

Sulfurized Limonene

1-METHYL-4-METHYLETHENYL-CYCLOHEXENE SULFURIZED

2.0

This sulfurized limonene compound is rarely used in skincare and may cause irritation; it's best avoided in leave-on products.

Irritation

moderate

Source

semi-synthetic

beautyskincarefragrance
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Antimicrobial

Sulfurized Tea-Ricinoleate

SULFURIZED TEA-RICINOLEATE

3.8

A sulfur-infused oil derivative that helps control acne and dandruff by reducing microbes and excess oil, but may cause irritation in sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincareantimicrobial
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Emollient

Sumac Fruit Wax

Rhus Succedanea Fruit Cera

4.0

Sumac fruit wax is a natural, plant-derived wax that helps thicken and soften skincare products with a low risk of irritation.

Irritation

low

Source

natural

beautyskincareemollient
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Antioxidant

Sumac Leaf/Stem Extract

Rhus Semialata Leaf/Stem Extract

3.8

A gentle botanical extract that may help protect skin from environmental stress, but research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Sumac Root Extract

Rhus Semialata Root Extract

3.8

Sumac root extract is a gentle, antioxidant-rich botanical that may help calm skin and fight free radical damage, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Summer Savory Leaf Extract

SATUREJA HORTENSIS LEAF EXTRACT

3.8

A gentle botanical extract with antioxidant potential, but research in skincare is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Summer Snowflake Bulb Extract

LEUCOJUM AESTIVUM BULB EXTRACT

3.8

A gentle botanical extract that may help calm skin and fight free radicals, but research is still early.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Summer Truffle Extract

Tuber Aestivum Extract

3.8

A trendy, antioxidant-rich mushroom extract that may help protect skin from environmental stress, but research is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing Agent

Sundew Extract

Drosera Ramentacea Extract

3.5

A gentle plant extract with potential soothing and antioxidant benefits, but research is limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Sunflower Flower Extract

Helianthus Annuus Flower Extract

4.0

A gentle, antioxidant-rich extract from sunflower flowers that helps soothe and protect skin without irritation.

Irritation

low

Source

natural

beautyskincareantioxidant
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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

beautyskincareexfoliant
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Emulsifier

Sunflower Glycerides Citrate

Sunflower Glycerides Citrate

4.3

A mild, plant-based emulsifier that helps blend oil and water in formulas while leaving skin feeling soft and conditioned.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Antioxidant

Sunflower Leaf/Stem Extract

HELIANTHUS ANNUUS LEAF/STEM EXTRACT

3.8

A gentle plant extract with antioxidant potential, but research on its cosmetic benefits is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Emollient

Sunflower Oil Decyl Esters

SUNFLOWER OIL DECYL ESTERS

4.3

A lightweight, plant-based emollient that hydrates without clogging pores, ideal for sensitive and oily skin types.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emollient

Sunflower Seed Butter

Helianthus Annuus Seed Butter

4.3

A gentle, plant-based butter that moisturizes without clogging pores, ideal for dry or sensitive skin.

Irritation

low

Source

natural

beautyskincareemollient
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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

beautyskincareexfoliant
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Emollient

Sunflower Seed Oil

Helianthus Annuus Seed Oil

4.5

A gentle, nourishing oil that hydrates and supports the skin barrier without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Sunflower Seed Oil Cetyl Esters

SUNFLOWER SEED OIL CETYL ESTERS

4.3

A gentle, plant-derived emollient that softens skin without clogging pores, ideal for sensitive and dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emollient

Sunflower Seed Oil Esters

SUNFLOWER SEED OIL/HYDROGENATED SUNFLOWER SEED OIL ESTERS

4.3

A gentle, plant-derived emollient that softens and smooths skin without clogging pores, suitable for most skin types.

Irritation

low

Source

natural

beautyskincareemollient
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Emulsifier

Sunflower Seed Oil Glycereth-8 Esters

HELIANTHUS ANNUUS (SUNFLOWER) SEED OIL GLYCERETH-8 ESTERS

4.3

A mild, sunflower-derived emulsifier that stabilizes formulas while leaving skin feeling soft and non-greasy.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emollient

Sunflower Seed Oil Glyceride

SUNFLOWER SEED OIL GLYCERIDE

4.3

A mild, plant-based emollient that softens and conditions skin without clogging pores, ideal for sensitive and dry skin types.

Irritation

low

Source

natural

beautyskincareemollient
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Emulsifier

Sunflower Seed Oil PEG-32 Esters

SUNFLOWER SEED OIL PEG-32 ESTERS

4.0

A gentle, plant-derived emulsifier that helps water and oil mix in your skincare products without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emollient

Sunflower Seed Wax

Helianthus Annuus Seed Cera

4.5

A gentle, plant-derived wax that adds texture and moisture without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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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

beautyskincareexfoliant
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Antioxidant

Sunflower Seedcake Extract

Helianthus Annuus Seedcake Extract

4.0

A gentle, antioxidant-rich extract from sunflower seeds that helps soothe and protect the skin.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Sunflower Sprout Extract

Helianthus Annuus Sprout Extract

4.0

Sunflower sprout extract is a gentle, antioxidant-rich ingredient that helps protect skin from environmental stress and may calm irritation.

Irritation

low

Source

natural

beautyskincareantioxidant
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Skin Conditioning

Sunflower Sprout Ferment Extract

SACCHAROMYCES/HELIANTHUS ANNUUS SPROUT FERMENT EXTRACT

4.0

A gentle, fermented botanical extract that may support skin barrier function and provide antioxidant benefits, though human studies are limited.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Surfactant

Sunfloweramide MEA

SUNFLOWERAMIDE MEA

4.0

A gentle, plant-derived surfactant that helps create a rich lather without stripping the skin, making it a good choice for sensitive skin cleansers.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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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

beautyskincareexfoliant
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Antioxidant

Superoxide Dismutase

Superoxide Dismutase

4.0

Superoxide Dismutase is a powerful antioxidant enzyme that helps defend skin against oxidative stress and may support a more even, youthful-looking complexion.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Surfgrass Extract

Phyllospadix scouleri extract

3.8

Surfgrass extract is a gentle marine antioxidant that may help calm skin and defend against environmental stress, but research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Sutherlandia Leaf Extract

Sutherlandia Frutescens Leaf Extract

3.8

Sutherlandia leaf extract is a gentle, antioxidant-rich botanical that may help calm skin and protect against environmental stress, though human studies are limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Swallowwort Extract

Vincetoxicum atratum extract

3.8

A gentle botanical extract with antioxidant potential, but research is limited and mostly traditional.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Swallowwort Root Extract

VINCETOXICUM HIRUNDINARIA ROOT EXTRACT

3.5

A gentle botanical root extract with antioxidant potential, but limited human research to support specific skincare benefits.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Soothing agent

Swallowwort Root Powder

Vincetoxicum Atratum Root Powder

3.5

A traditional botanical root powder with potential soothing and antioxidant benefits, but clinical evidence in cosmetics is limited.

Irritation

low

Source

natural

beautyskincarebotanical
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Hair Conditioning Agent

Sweet Almond Amino Acids

Prunus Amygdalus Dulcis (Sweet Almond) Amino Acids

4.0

A mild, plant-based amino acid that helps strengthen hair and hydrate skin without irritation.

Irritation

low

Source

natural

beautyskincarehaircare
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Antioxidant

Sweet Almond Bark Extract

PRUNUS AMYGDALUS DULCIS (SWEET ALMOND) BARK EXTRACT

3.8

A gentle, antioxidant-rich plant extract that may help protect skin from environmental stress, though research is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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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

beautyskincareexfoliant
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Soothing Agent

Sweet Almond Bud Extract

Prunus Amygdalus Dulcis (Sweet Almond) Bud Extract

4.0

A gentle, antioxidant-rich extract from sweet almond buds that may help calm and protect the skin, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing Agent

Sweet Almond Flower Extract

Prunus Amygdalus Dulcis Flower Extract

4.0

A gentle, antioxidant-rich botanical extract that may help calm skin and protect against environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Sweet Almond Fruit Extract

PRUNUS AMYGDALUS DULCIS (SWEET ALMOND) FRUIT EXTRACT

4.0

A gentle, antioxidant-packed extract from almond fruit that helps protect skin from environmental stress without clogging pores.

Irritation

low

Source

natural

beautyskincareantioxidant
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