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

Exfoliant

Tioxolone

Tioxolone

3.5

Tioxolone is a synthetic exfoliant with antimicrobial properties, but research on its effectiveness and safety is limited compared to more common ingredients like salicylic acid.

Irritation

moderate

Source

synthetic

beautyskincareexfoliant
Read ingredient review

Surfactant

TIPA Lauryl Sulfate

TIPA-LAURYL SULFATE

3.5

A mild surfactant alternative to SLS, but may still cause irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleanser
Read ingredient review

Emulsifier

TIPA Myristate

TIPA-MYRISTATE

3.5

TIPA Myristate helps blend oil and water in creams, but may clog pores for acne-prone skin.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Emulsifier

TIPA Stearate

TIPA-STEARATE

3.8

TIPA Stearate is a reliable emulsifier that helps create smooth, stable creams and lotions, but it may not suit those seeking entirely natural ingredients.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Film Former

TIPA-Acrylates Copolymer

TIPA-ACRYLATES/ETHYLHEXYL ACRYLATE COPOLYMER

3.8

A synthetic film-former that helps products stay put longer, but may feel tight or stiff on some skin types.

Irritation

low

Source

synthetic

beautyskincarehaircare
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Surfactant

TIPA-C12-14 Pareth-3 Acetate

TIPA-C12-14 PARETH-3 ACETATE

3.8

A mild, semi-synthetic surfactant that helps create a rich lather while being gentle enough for sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

TIPA-Laureth Sulfate

TIPA-Laureth Sulfate

3.5

A mild alternative to SLS/SLES, but still a surfactant that can be drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleanser
Read ingredient review

Film Former

Titanium Crosspolymer

ISOPROPYL TITANIUM TRIISOSTEARATE/TRIETHOXYCAPRYLYLSILANE CROSSPOLYMER

3.8

A synthetic crosspolymer that helps makeup last longer and feel smoother, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincarecosmetic
Read ingredient review

Film Former

Titanium Crosspolymer Blend

ISOPROPYL TITANIUM TRIISOSTEARATE/PERFLUOROOCTYL TRIETHOXYSILANE CROSSPOLYMER

3.5

A synthetic film former that helps makeup and sunscreen stay put longer, but it's not a skincare active.

Irritation

low

Source

synthetic

beautyskincarecosmetic
Read ingredient review

UV Filter

Titanium Dioxide

Titanium Dioxide

4.5

A well-studied mineral sunscreen ingredient that provides broad-spectrum UV protection with minimal irritation risk.

Irritation

low

Source

natural

beautyskincaresunscreenpigment
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Opacifying Agent

Titanium Hydroxide

Titanium Hydroxide

3.5

Titanium hydroxide is a gentle mineral opacifier that helps give makeup a smooth, opaque finish, but it's less common than titanium dioxide and offers no UV protection on its own.

Irritation

low

Source

natural

beautyskincareopacifying agent
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Binder

Titanium Isostearates

Titanium Isostearates

3.5

Titanium Isostearates is a safe, synthetic binder that helps pressed powders and color cosmetics hold together without causing irritation.

Irritation

low

Source

synthetic

beautyskincarecosmetic
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Colorant

Titanium Nitride

Titanium Nitride

3.5

Titanium Nitride is a safe, non-irritating pigment that adds shimmer and color to makeup, but it offers no skincare benefits.

Irritation

low

Source

synthetic

beautyskincarecolorant
Read ingredient review

UV Filter

Titanium Salicylate

Titanium Salicylate

3.5

Titanium Salicylate is a synthetic UV filter that helps protect skin from sun damage, but its use is less common than other filters and may require more research for long-term safety.

Irritation

low

Source

synthetic

beautyskincaresunscreen
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Film Former

Titanium/Silicone Crosspolymer Blend

ISOPROPYL TITANIUM TRIISOSTEARATE/TRIETHOXYSILYLETHYL POLYDIMETHYLSILOXYETHYL DIMETHICONE CROSSPOLYMER

3.5

A specialized silicone-based ingredient that helps makeup and sunscreen stay put and feel silky, but it's not a skincare active.

Irritation

low

Source

semi-synthetic

beautyskincarecosmetic
Read ingredient review

Antioxidant

Tithonia Extract

Tithonia Diversifolia Flower/Leaf/Stem Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Tithonia Flower Extract

Tithonia Diversifolia Flower Extract

3.5

A plant extract with early research suggesting antioxidant benefits, but limited human studies for skincare.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Emollient

TMP Lauryl Dimethicone

TMP LAURYL DIMETHICONE

4.0

A gentle silicone that helps products spread smoothly and feel silky without clogging pores.

Irritation

low

Source

synthetic

beautyskincarehaircare
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Antioxidant

Tobacco Flower Extract

Nicotiana Tabacum Flower Extract

3.5

Tobacco flower extract is a gentle antioxidant that may help calm skin, but research is still early and it's not a proven powerhouse.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Tobacco Flower Oil

NICOTIANA TABACUM FLOWER OIL

3.5

Tobacco flower oil adds a unique scent to products but has limited research on skin benefits and may irritate sensitive skin.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Antioxidant

Tobacco Leaf Cell Culture

NICOTIANA SYLVESTRIS LEAF CELL CULTURE

4.0

A biotech antioxidant from tobacco leaf cells that helps protect skin from environmental stress and supports a more even tone.

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tobacco Leaf Extract

Nicotiana Tabacum Leaf Extract

3.5

Tobacco leaf extract is an antioxidant-rich botanical that may help soothe and protect skin, but research is still emerging and it's not a mainstream ingredient.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Tobacco Leaf Oil

NICOTIANA TABACUM LEAF OIL

2.5

Tobacco leaf oil is a controversial ingredient with potential antioxidant benefits but significant safety concerns, including skin irritation and nicotine content.

Irritation

high

Source

natural

beautyskincarefragrance
Read ingredient review

Anti-aging agent

Tobacco Peptide Complex

Nicotiana Benthamiana Hexapeptide-40 Sh-Polypeptide-86

3.8

A plant-derived peptide blend that may help firm skin and soften wrinkles, but research is still early.

Irritation

low

Source

biotech

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Tobacco Plant Peptide Complex

Nicotiana Benthamiana Hexapeptide-40 Sh-Polypeptide-76

3.5

A novel peptide complex from tobacco plants that may support collagen and skin firmness, but research is still early.

Irritation

low

Source

biotech

beautyskincarepeptide
Read ingredient review

Antioxidant

Tococysteamide

Tococysteamide

3.8

Tococysteamide is a gentle antioxidant that may help brighten skin and defend against pollution, but research is still early.

Irritation

low

Source

synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tocophereth-10

TOCOPHERETH-10

4.0

A gentle, water-soluble vitamin E derivative that helps protect skin from environmental damage without the greasiness of pure vitamin E.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tocophereth-12

TOCOPHERETH-12

4.0

A water-soluble form of vitamin E that provides antioxidant protection and helps stabilize other ingredients, but may be less potent than pure tocopherol.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tocophereth-18

TOCOPHERETH-18

4.0

A gentle, water-soluble vitamin E derivative that helps protect skin from oxidative stress without the greasy feel of pure tocopherol.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tocophereth-5

TOCOPHERETH-5

4.0

A gentle, water-soluble vitamin E derivative that helps protect skin from environmental stress while adding light hydration.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tocophereth-50

Tocophereth-50

4.0

A gentle, water-friendly version of vitamin E that helps protect skin from environmental damage without the greasy feel of regular vitamin E.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tocopherol

Tocopherol

4.5

Tocopherol is a well-studied antioxidant that helps neutralize free radicals and supports skin barrier function, making it a gentle, beneficial addition to most routines.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tocopherol Wheat Peptide Complex

Tocopherol/Wheat Polypeptides

4.0

A gentle antioxidant blend that pairs vitamin E with wheat proteins to support skin barrier function and provide light hydration.

Irritation

low

Source

mixed

beautyskincareantioxidantconditioning agent
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Antioxidant

Tocophersolan

Tocophersolan

4.0

A gentle, water-soluble vitamin E derivative that helps protect skin from oxidative stress and improves product stability.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Antioxidant

Tocopheryl Acetate

Tocopheryl Acetate

4.3

A stable, well-tolerated form of vitamin E that helps protect skin from environmental damage and supports moisture retention.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Antioxidant

Tocopheryl Dimethylglycinate

TOCOPHERYL DIMETHYLGLYCINATE

4.0

A gentle, water-soluble vitamin E derivative that offers antioxidant protection without the greasy feel of traditional vitamin E.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Antioxidant

Tocopheryl Dimethylglycinate HCl

Tocopheryl Dimethylglycinate HCl

3.8

A modified, water-friendly form of vitamin E that may offer antioxidant benefits with less greasiness than traditional tocopherol.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tocopheryl Ethylascorbyl PEG-4 Bis-Succinate

Tocopheryl Ethylascorbyl PEG-4 Bis-Succinate

4.3

A cleverly designed antioxidant that pairs vitamins C and E in one stable molecule, offering dual protection without the typical instability of pure vitamin C.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Antioxidant

Tocopheryl Glucoside

Tocopheryl Glucoside

4.3

A gentle, water-soluble vitamin E derivative that helps protect skin from environmental damage without the greasy feel of pure vitamin E.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tocopheryl Nicotinate

Tocopheryl Nicotinate

4.0

A gentle, fat-soluble antioxidant that combines vitamin E with niacin to support skin health and circulation.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tocopheryl Phosphocholine

TOCOPHERYLPHOSPHOCHOLINE

4.0

A stabilized, more skin-friendly version of vitamin E that may offer better antioxidant delivery with less irritation.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tocopheryl Retinoate

Tocopheryl Retinoate

4.0

A gentle retinoid alternative that pairs vitamin A with vitamin E to support smoother, firmer-looking skin with less irritation than traditional retinol.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidantretinoid
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Antioxidant

Tocopheryl Succinate Methylglucamide

Tocopheryl Succinate Methylglucamide

4.0

A stable, water-friendly version of vitamin E that helps protect skin from environmental damage without the greasy feel of traditional vitamin E.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tocopheryl Tranexamate HCl

Tocopheryl Tranexamate HCl

3.8

A novel ingredient that pairs vitamin E with a brightening agent, but research is still limited compared to more established alternatives.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tofieldia Japonica Leaf Extract

TOFIELDIA JAPONICA LEAF 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

beautyskincareantioxidant
Read ingredient review

Antifungal Agent

Tolnaftate

Tolnaftate

3.5

Tolnaftate is a well-studied synthetic antifungal that effectively treats common fungal skin infections, but it is not a general skincare ingredient and should only be used for diagnosed fungal issues.

Irritation

low

Source

synthetic

beautyskincareantifungal
Read ingredient review

Fragrance

Tolu Balsam Resin

Myroxylon Balsamum Resin

3.0

Tolu Balsam Resin adds a warm, sweet scent to products but is a known allergen for some people, so it's best avoided in sensitive or fragrance-reactive skin.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Fragrance

Tolualdehyde Isomers

TOLUALDEHYDE ISOMERS

3.5

A synthetic fragrance ingredient that provides a sweet, almond-like scent but may cause skin irritation in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
Read ingredient review

pH Adjuster

Toluene Sulfonic Acid

TOLUENE SULFONIC ACID

3.5

Toluene sulfonic acid is a synthetic pH adjuster that helps products maintain the right acidity, but it can be irritating at high concentrations.

Irritation

moderate

Source

synthetic

beautyskincarepH adjuster
Read ingredient review

Antioxidant

Tomato Callus Culture Extract

Solanum Lycopersicum (Tomato) Callus Culture Conditioned Media

3.8

A plant-based biotech ingredient that may help shield skin from pollution and UV damage, but research is still early.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Tomato Calyx Extract

Solanum Lycopersicum (Tomato) Calyx Extract

3.8

A gentle, plant-based antioxidant from tomato leaves that may help protect skin from environmental stress, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tomato Ferment Extract

LACTOBACILLUS/TOMATO FRUIT FERMENT EXTRACT

4.0

A gentle, fermented antioxidant that may help brighten and protect skin, but research is still emerging.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Tomato Fruit Juice

Solanum Lycopersicum (Tomato) Fruit Juice

3.8

Tomato fruit juice offers antioxidant and soothing benefits, but its effectiveness in skincare is modest compared to more concentrated vitamin C or lycopene extracts.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Emollient

Tomato Fruit Lipids

Solanum Lycopersicum Fruit Lipids

4.0

A lightweight, antioxidant-rich oil that hydrates and softens skin without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Humectant

Tomato Fruit Water

Solanum Lycopersicum (Tomato) Fruit Water

3.8

A gentle, hydrating water from tomatoes that offers light antioxidant benefits, but its effects are mild compared to more concentrated extracts.

Irritation

low

Source

natural

beautyskincarehumectant
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Antioxidant

Tomato Fruit/Leaf/Stem Extract

Solanum Lycopersicum (Tomato) Fruit/Leaf/Stem Extract

3.8

A gentle, antioxidant-rich plant extract that may help protect skin from environmental stress and soothe minor irritation.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Tomato Leaf Cell Culture Extract

Solanum Lycopersicum (Tomato) Leaf Cell Culture Extract

4.0

A gentle, lab-grown antioxidant from tomato leaves that helps defend skin against pollution and UV damage without irritation.

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review