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

Preservative

Silver Citrate

Silver Citrate

3.8

Silver citrate is a gentle preservative that helps keep products fresh without the harshness of traditional parabens or formaldehyde-releasers.

Irritation

low

Source

synthetic

beautyskincarepreservative
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Antimicrobial

Silver Ferment

SACCHAROMYCES/SILVER FERMENT

3.8

Silver Ferment is a gentle antimicrobial ingredient that can help balance skin microflora and reduce unwanted bacteria without harsh preservatives.

Irritation

low

Source

biotech

beautyskincarepreservative
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Antioxidant

Silver Fern Leaf Extract

Cyathea medullaris leaf extract

3.8

A gentle, antioxidant-rich fern extract that may help soothe and protect skin, though human studies are limited.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Silver Fir Cone Extract

Abies Alba Cone Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Silver Fir Leaf Extract

Abies Pectinata Leaf Extract

3.8

A gentle, plant-based antioxidant that may help calm skin and defend against environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Silver Fir Leaf Oil

Abies Alba Leaf Oil

3.8

Silver Fir Leaf Oil adds a fresh, forest-like scent to products but can be irritating for sensitive skin, especially at higher concentrations.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Emollient

Silver Fir Leaf Wax

Abies Alba Leaf Wax

4.0

A gentle, plant-derived wax that helps lock in moisture and gives products a smooth, creamy texture without clogging pores.

Irritation

low

Source

natural

beautyskincareemollientfilm-former
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Antioxidant

Silver Fir Needle Extract

Abies Pectinata Needle Extract

4.0

A gentle, plant-derived antioxidant that may help calm skin and protect against environmental stress.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Silver Fir Needle Oil

Abies Pectinata Needle Oil

3.5

Silver fir needle oil adds a fresh, woodsy scent to products but may irritate sensitive skin and lacks strong evidence for skincare benefits beyond fragrance.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Fragrance

Silver Fir Oil

Abies Pectinata Oil

3.8

Silver Fir Oil adds a fresh, forest-like scent to products but can be irritating for sensitive skin and is mainly used for fragrance rather than active skincare benefits.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Antioxidant

Silver Fir Seed Extract

Abies Alba Seed Extract

3.8

A gentle, antioxidant-rich plant extract that may help calm skin and fight environmental stress, but research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Silver Fir Wood Extract

Abies Alba Wood Extract

3.8

A gentle, plant-based antioxidant extract that may help calm skin and fight environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Silver Fir Wood Oil

Abies Pectinata Wood Oil

3.8

Silver Fir Wood Oil adds a fresh, forest-like scent to products but may irritate sensitive skin due to its essential oil components.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Antimicrobial

Silver Hydroxide

Silver Hydroxide

3.5

Silver hydroxide is a gentle antimicrobial that helps keep products fresh and may support acne-prone skin, but its benefits are limited compared to more studied ingredients.

Irritation

low

Source

synthetic

beautyskincarepreservative
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Antimicrobial

Silver Lactate

Silver Lactate

3.5

Silver lactate is an effective antimicrobial ingredient often used in deodorants, but it may cause irritation in sensitive skin and has limited long-term safety data in leave-on products.

Irritation

moderate

Source

synthetic

beautyskincareantimicrobial
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Preservative

Silver Magnesium Aluminum Phosphate

Silver Magnesium Aluminum Phosphate

3.5

A synthetic mineral preservative booster that helps keep products fresh with a low irritation profile, but its long-term safety data is still emerging.

Irritation

low

Source

synthetic

beautyskincarepreservative
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Soothing Agent

Silver Nailwort Leaf Extract

Paronychia Argentea Leaf Extract

3.8

A gentle botanical extract with traditional soothing and antioxidant potential, though modern clinical evidence is still limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Preservative

Silver Nitrate

SILVER NITRATE

2.5

Silver nitrate is a potent antimicrobial but is rarely used in modern skincare due to its high irritation potential and staining risk.

Irritation

high

Source

synthetic

beautyskincarepreservative
Read ingredient review

Colorant

Silver Oxide

SILVER OXIDE

2.5

Silver oxide is a rare cosmetic ingredient with potential antimicrobial benefits, but its safety profile is not well-established for routine skincare use.

Irritation

moderate

Source

synthetic

beautyskincarecolorant
Read ingredient review

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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Preservative

Silver Sulfate

Silver Sulfate

3.5

Silver sulfate is an effective preservative but can be irritating for sensitive skin; it's best used in rinse-off products.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
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Antimicrobial

Silver Titanium Carbide

Silver/Titanium Carbide

3.0

Silver titanium carbide is an experimental ingredient with potential antimicrobial benefits, but its safety and efficacy in cosmetics are not well established.

Irritation

moderate

Source

synthetic

beautyskincareantimicrobial
Read ingredient review

Antioxidant

Silver Vine Extract

ACTINIDIA POLYGAMA LEAF/STEM EXTRACT

3.8

Silver vine extract is a gentle antioxidant that may help calm and protect skin, but research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Silver Vine Fruit Extract

ACTINIDIA POLYGAMA FRUIT EXTRACT

3.8

A gentle, antioxidant-rich fruit extract that may help protect skin from environmental stress, though research on its cosmetic benefits is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Silver Vine Leaf Extract

Actinidia Polygama Leaf Extract

3.8

A gentle, antioxidant-rich plant extract that may help calm and protect skin, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Silver Wattle Extract

Acacia Dealbata Flower/Stem Extract

3.8

A gentle botanical extract with antioxidant potential, but research on its specific skin benefits is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Silver Wattle Flower Extract

Acacia Dealbata Flower Extract

3.8

A gentle botanical extract with antioxidant and soothing potential, though research on its cosmetic benefits is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Silver Wattle Leaf Extract

Acacia dealbata leaf extract

3.8

A gentle botanical extract with antioxidant and soothing potential, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Silybin

Silybin

4.0

A plant-derived antioxidant that helps protect skin from environmental stress and may calm irritation.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Silybin Maltoside

Silybin Maltoside

4.0

A gentle antioxidant that helps protect skin from environmental damage and may support a more even tone.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Film Former

Silylated Arginine Crosspolymer

TRIMETHYLSILYL ARGININE PG-PROPYL METHYLSILANEDIOL CROSSPOLYMER

3.8

A silicone-arginine hybrid that provides smoothness and conditioning without heavy buildup.

Irritation

low

Source

semi-synthetic

beautyskincarehaircarefilm former
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Film Former

Silylated Casein Complex

DIHYDROXYMETHYLSILYLPROPOXY HYDROXYPROPYL HYDROLYZED CASEIN

3.8

A gentle, film-forming ingredient that smooths hair and skin by depositing a lightweight, protective layer.

Irritation

low

Source

semi-synthetic

beautyskincarehaircarefilm-former
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Film Former

Silylated Collagen Crosspolymer

Trimethylsilyl Hydrolyzed Collagen PG-Propyl Methylsilanediol Crosspolymer

3.8

A silicone-collagen hybrid that forms a smooth, flexible film for temporary smoothing and conditioning, but offers no lasting collagen benefit.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Silylated Conchiolin Protein Complex

TRIMETHYLSILYL HYDROLYZED CONCHIOLIN PROTEIN PG-PROPYL METHYLSILANEDIOL CROSSPOLYMER

3.8

A silicone-modified pearl protein that forms a flexible, breathable film for smoother hair and a temporary skin-smoothing effect.

Irritation

low

Source

semi-synthetic

beautyskincarehaircarefilm former
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Antioxidant

Silylated Grape Seed Extract

T-BUTYL DIMETHYL SILYL GRAPE SEED EXTRACT

3.5

A modified grape seed extract that may offer antioxidant benefits with improved stability, but research is limited.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Film Former

Silylated Pea Protein Complex

Trimethylsilyl Hydrolyzed Pea Protein PG-Propyl Methylsilanediol Crosspolymer

3.8

A gentle film-forming ingredient that adds smoothness and shine to hair and skin without heavy buildup.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Silylated Silk Crosspolymer

Trimethylsilyl Hydrolyzed Silk PG-Propyl Methylsilanediol Crosspolymer

4.0

A gentle, silicone-like film former derived from silk that smooths skin and hair without heavy buildup.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Silylated Wheat Protein Complex

TRIMETHYLSILYL HYDROLYZED WHEAT PROTEIN PG-PROPYL METHYLSILANEDIOL CROSSPOLYMER

4.0

A gentle film-forming ingredient that smooths hair and skin without heavy buildup, but may not suit those avoiding silicones or wheat-derived ingredients.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Soothing agent

Simaruba Amara Extract

SIMARUBA AMARA EXTRACT

3.8

Simaruba Amara Extract is a gentle botanical with antioxidant and soothing potential, but research is limited and it's not a proven powerhouse ingredient.

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review

Anti-foaming Agent

Simethicone

Simethicone

4.0

Simethicone is a gentle silicone that helps prevent foam and bubbles in products, but it offers no active skincare benefits and may feel heavy on some skin types.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Antioxidant

Sinapic Acid

Sinapic Acid

4.0

Sinapic acid is a gentle antioxidant that helps protect skin from environmental stress and may support a more even skin tone, but it is less studied than vitamin C or ferulic acid.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Siparuna Leaf Oil

SIPARUNA GUIANENSIS LEAF OIL

3.5

Siparuna Leaf Oil adds a natural, earthy fragrance to products but has limited research on skin benefits and may cause irritation in sensitive individuals.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Antioxidant

Siphonostegia Chinensis Extract

SIPHONOSTEGIA CHINENSIS EXTRACT

3.8

A gentle botanical extract with antioxidant potential, but research is still early and benefits are not yet proven in human skin.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Emollient

Skin Lipids

Skin Lipids

4.0

Skin lipids are a gentle, effective way to support your skin's natural barrier and lock in moisture.

Irritation

low

Source

natural

beautyskincareemollient
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Antioxidant

Skullcap Callus Culture Extract

SCUTELLARIA BAICALENSIS CALLUS CULTURE

4.3

A lab-grown antioxidant from skullcap root that helps calm skin and fight environmental damage without the need for wild harvesting.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Skullcap Extract

Scutellaria Galericulata Extract

4.0

A gentle botanical extract that helps calm skin and defend against environmental stress, suitable for most skin types.

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing agent

Skullcap Flower Powder

SCUTELLARIA LATERIFLORA FLOWER POWDER

4.0

A gentle botanical powder that may help calm irritated skin and provide antioxidant protection.

Irritation

low

Source

natural

beautyskincarebotanical
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Antioxidant

Skullcap Leaf Extract

Scutellaria Galericulata Leaf Extract

4.0

A gentle, antioxidant-rich plant extract that helps calm skin and defend against environmental stress.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Skullcap Root Ferment Filtrate

LACTOBACILLUS/SCUTELLARIA BAICALENSIS ROOT EXTRACT FERMENT FILTRATE

4.0

A fermented botanical extract that offers antioxidant and soothing benefits, but research is mostly lab-based and individual results vary.

Irritation

low

Source

biotech

beautyskincareantioxidantsoothing
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Antioxidant

Skullcap Sprout Extract

Scutellaria Baicalensis Sprout Extract

4.0

A gentle, plant-based antioxidant that may help soothe and protect skin from environmental stress.

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing Agent

Slippery Elm Bark Extract

ULMUS FULVA BARK EXTRACT

4.0

Slippery elm bark extract is a gentle, mucilage-rich botanical that forms a protective film on the skin, helping to soothe irritation and lock in moisture.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Antioxidant

Small-Leaf Raspberry Fruit Extract

RUBUS PARVIFOLIUS FRUIT EXTRACT

4.0

A gentle, antioxidant-rich fruit extract that helps protect skin from environmental stress while providing mild soothing benefits.

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing agent

Smilacina Japonica Extract

Smilacina Japonica Extract

3.8

A gentle botanical extract with antioxidant potential, but research is limited and benefits are not yet well-established.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Smilax China Bark Extract

Smilax China (China Root) Bark Extract

3.8

Smilax China Bark Extract is a gentle botanical with antioxidant and soothing potential, but research on its cosmetic benefits is still limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Smilax China Fruit Extract

Smilax China Fruit Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing Agent

Smilax Glabra Root Extract

Smilax Glabra Root Extract

3.8

A gentle botanical root extract with antioxidant and soothing potential, though clinical evidence in skincare is still emerging.

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review