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 20,769
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

TDI/Trimellitic Anhydride Copolymer

TDI/Trimellitic Anhydride Copolymer

3.0

A synthetic polymer that helps nail polish dry hard and stay glossy, but its safety relies on proper formulation and avoiding inhalation during application.

Irritation

low

Source

synthetic

beautynail carefilm former
Read ingredient review

Antioxidant

Tea & Ginseng Leaf-Root Extract

Camellia Sinensis Leaf / Panax Ginseng Root Extract

4.0

A gentle antioxidant duo from green tea and ginseng that helps protect skin from environmental stress and may support a calmer complexion.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Surfactant

TEA C14-17 Alkyl Sec Sulfonate

TEA C14-17 ALKYL SEC SULFONATE

3.8

A gentle, effective cleanser that removes dirt and oil without stripping the skin, but may not suit ultra-sensitive scalps.

Irritation

low

Source

synthetic

beautyskincarecleanser
Read ingredient review

pH Adjuster

Tea Hydrochloride

TEA-HYDROCHLORIDE

3.5

Tea Hydrochloride is a gentle pH adjuster that helps keep your skincare products stable and comfortable on skin, but it offers no direct skin benefits.

Irritation

low

Source

synthetic

beautyskincarepH adjuster
Read ingredient review

Preservative

Tea Hydroiodide

TEA-HYDROIODIDE

2.5

Tea Hydroiodide is a synthetic preservative booster with limited safety data; it's rarely used in modern skincare and may cause irritation in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
Read ingredient review

Surfactant

TEA Perfluoroalkylethyl Phosphate

TEA-C8-18 PERFLUOROALKYLETHYL PHOSPHATE

3.5

A synthetic emulsifier that helps water-resistant formulas spread evenly, but its perfluoroalkyl structure raises environmental persistence concerns.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Antioxidant

Tea Sprout Extract

Camellia Sinensis Sprout Extract

4.0

A gentle, antioxidant-rich extract from young tea leaves that helps protect skin from environmental stress and may calm irritation.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antimicrobial

Tea Tree Flower-Leaf-Stem Extract

Melaleuca Alternifolia Flower/Leaf/Stem Extract

3.8

A natural antimicrobial extract that can help with acne-prone skin but may cause irritation at high concentrations.

Irritation

moderate

Source

natural

beautyskincareantimicrobial
Read ingredient review

Antimicrobial

Tea Tree Leaf Extract

Melaleuca Alternifolia Leaf Extract

4.0

Tea tree leaf extract is a natural antimicrobial ingredient often used to help manage acne and soothe minor skin irritations, but it can be irritating at high concentrations.

Irritation

moderate

Source

natural

beautyskincaresoothing agent
Read ingredient review

Antimicrobial

Tea Tree Leaf Powder

Melaleuca Alternifolia Leaf Powder

3.8

Tea tree leaf powder can help purify oily or blemish-prone skin, but it may cause irritation in sensitive individuals.

Irritation

moderate

Source

natural

beautyskincarebotanical
Read ingredient review

Soothing Agent

Tea Tree Leaf Water

MELALEUCA ALTERNIFOLIA LEAF WATER

3.8

A milder alternative to tea tree oil, tea tree leaf water offers gentle antimicrobial benefits with a much lower risk of irritation.

Irritation

low

Source

natural

beautyskincaresoothing
Read ingredient review

Antimicrobial

Tea Tree Oil

Melaleuca Alternifolia Leaf Oil

4.0

Tea tree oil is a natural antimicrobial that can help with mild acne, but it must be used at safe concentrations to avoid skin irritation.

Irritation

moderate

Source

natural

beautyskincareessential oil
Read ingredient review

Film Former

TEA-Abietoyl Hydrolyzed Collagen

TEA-Abietoyl Hydrolyzed Collagen

3.8

A semi-synthetic collagen derivative that forms a light film on skin to help smooth texture and temporarily reduce the look of fine lines, but research on its long-term benefits is limited.

Irritation

low

Source

semi-synthetic

beautyskincareconditioning agent
Read ingredient review

Surfactant

TEA-C10-15 Alkyl Sulfate

TEA-C10-15 Alkyl Sulfate

3.5

An effective but potentially drying cleanser that works well for oily skin but may irritate sensitive or dry skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

TEA-C11-15 Alkyl Sulfate

TEA-C11-15 Alkyl Sulfate

3.5

A strong synthetic cleanser that effectively removes dirt and oil but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

TEA-C12-13 Alkyl Phosphate

TEA-C12-13 Alkyl Phosphate

3.5

A mild-ish synthetic surfactant that helps cleanse without stripping, but may still irritate very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

TEA-C12-13 Alkyl Sulfate

TEA-C12-13 Alkyl Sulfate

3.5

A synthetic surfactant that effectively cleanses and foams, but may be drying or irritating for sensitive skin types.

Irritation

moderate

Source

synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

TEA-C12-13 Pareth-3 Sulfate

TEA-C12-13 PARETH-3 SULFATE

3.8

A milder alternative to sodium lauryl sulfate, but still a surfactant that can be drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

TEA-C12-14 Alkyl Phosphate

TEA-C12-14 Alkyl Phosphate

3.8

A mild synthetic surfactant that effectively cleanses without stripping the skin's natural moisture barrier.

Irritation

low

Source

synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

TEA-C12-14 Alkyl Sulfate

TEA-C12-14 Alkyl Sulfate

3.8

A mild foaming cleanser that effectively removes dirt and oil, but may be drying for very sensitive or dry skin.

Irritation

moderate

Source

synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

TEA-C12-15 Alkyl Sulfate

TEA-C12-15 Alkyl Sulfate

3.5

An effective foaming cleanser that can be drying or irritating for sensitive skin, but is generally considered safe in rinse-off products.

Irritation

moderate

Source

synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

TEA-C8-10 Alkyl Phosphate

TEA-C8-10 Alkyl Phosphate

4.0

A gentle surfactant that cleans without stripping the skin, making it a good choice for sensitive or dry skin types.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

TEA-Canolate

TEA-Canolate

3.5

TEA-Canolate is a mild cleansing agent from canola oil, but may be slightly drying for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Thickener

TEA-Carbomer

TEA-Carbomer

4.0

A safe, effective thickener that gives your skincare products a pleasant gel or cream texture without clogging pores.

Irritation

low

Source

synthetic

beautyskincaretexturizer
Read ingredient review

Surfactant

TEA-Cocamide Diacetate

TEA-Cocamide Diacetate

3.8

A gentle, coconut-derived cleansing ingredient that helps create a rich lather without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

TEA-Coco-Sulfate

TEA-Coco-Sulfate

3.8

A coconut-derived surfactant that cleans effectively but may be drying for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

TEA-Cocoate

TEA-Cocoate

3.5

TEA-Cocoate is a gentle cleansing agent that helps remove dirt and oil, but it may be slightly drying for very sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Tea-Cocoyl Alaninate

TEA-Cocoyl Alaninate

4.5

A gentle, amino-acid-based cleanser that effectively removes dirt and oil without stripping the skin, making it ideal for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

TEA-Cocoyl Glutamate

TEA-Cocoyl Glutamate

4.5

A gentle, plant-derived surfactant that cleanses without stripping the skin barrier, ideal for sensitive or dry skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

TEA-Cocoyl Glutaminate

TEA-COCOYL GLUTAMINATE

4.2

A gentle, amino-acid-based surfactant that cleanses effectively while respecting the skin barrier — ideal for sensitive or dry skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

TEA-Cocoyl Glycinate

TEA-Cocoyl Glycinate

4.5

A mild, coconut-derived cleanser that effectively removes dirt and oil without stripping the skin, making it ideal for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

TEA-Cocoyl Hydrolyzed Collagen

TEA-Cocoyl Hydrolyzed Collagen

3.8

A gentle, coconut-derived cleanser that also conditions skin and hair, but may not be ideal for very dry or sensitive scalps in high concentrations.

Irritation

low

Source

semi-synthetic

beautyskincarehaircaresurfactant
Read ingredient review

Surfactant

TEA-Cocoyl Sarcosinate

TEA-Cocoyl Sarcosinate

4.3

A gentle, amino-acid-based cleanser that effectively removes impurities while being kind to sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Texture Enhancer

TEA-Dextrin Octenylsuccinate

TEA-Dextrin Octenylsuccinate

4.0

A gentle, starch-based ingredient that improves product feel and stability without clogging pores or causing irritation.

Irritation

low

Source

semi-synthetic

beautyskincaretexturizer
Read ingredient review

Emulsifier

TEA-Diricinoleate

TEA-DIRICINOLEATE

3.8

A gentle emulsifier that helps mix oil and water in skincare products, with low irritation potential.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

TEA-Dodecylbenzenesulfonate

TEA-Dodecylbenzenesulfonate

3.5

An effective but potentially drying surfactant best suited for rinse-off cleansers, not for sensitive or dry skin.

Irritation

moderate

Source

synthetic

beautyskincarecleanser
Read ingredient review

Humectant

TEA-Glyceryl Dimaleate

TEA-Glyceryl Dimaleate

4.0

A gentle humectant that helps hydrate and condition skin without common irritation or clogging concerns.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
Read ingredient review

Surfactant

TEA-Hydrogenated Cocoate

TEA-Hydrogenated Cocoate

3.5

A mild cleansing agent that helps remove dirt and oil, but may cause irritation for very sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

TEA-Isostearate

TEA-Isostearate

3.8

TEA-Isostearate is a synthetic emulsifier that helps cleanse and stabilize formulas, but may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Film Former

TEA-Isostearoyl Hydrolyzed Collagen

TEA-ISOSTEAROYL HYDROLYZED COLLAGEN

3.5

A gentle, modified collagen that helps hair and skin feel smooth and conditioned, but its benefits are mostly temporary and surface-level.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Surfactant

TEA-Laneth-5 Sulfate

TEA-LANETH-5 SULFATE

3.5

A gentle surfactant that cleans without stripping, but may be slightly pore-clogging for acne-prone skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

TEA-Lauraminopropionate

TEA-Lauraminopropionate

3.8

A gentle surfactant that effectively cleanses without stripping the skin, suitable for sensitive skin types.

Irritation

low

Source

synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

TEA-Laurate

TEA-Laurate

3.5

TEA-Laurate helps create lather and remove dirt, but it can be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

TEA-Laurate/Myristate

TEA-Laurate/Myristate

3.5

A synthetic cleansing agent that can be effective but may cause irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

TEA-Laureth Sulfate

TEA-Laureth Sulfate

3.5

A milder alternative to SLS that effectively cleanses without stripping the skin as harshly, but may still cause irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

TEA-Laureth-4 Phosphate

TEA-Laureth-4 Phosphate

3.8

A gentle synthetic surfactant that helps cleanse without stripping the skin's natural moisture barrier.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

TEA-Lauroyl Glutamate

TEA-Lauroyl Glutamate

4.3

A gentle, amino-acid-based cleanser that effectively removes impurities while respecting the skin’s natural barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

TEA-Lauroyl Hydrolyzed Collagen

TEA-LAUROYL HYDROLYZED COLLAGEN

3.8

A gentle, collagen-derived surfactant that cleans without stripping, making it a good choice for sensitive skin and hair.

Irritation

low

Source

semi-synthetic

beautyskincarehaircaresurfactant
Read ingredient review

Surfactant

TEA-Lauroyl Lactylate

TEA-Lauroyl Lactylate

4.0

A gentle, sulfate-free surfactant that cleanses without stripping the skin barrier, making it a good choice for sensitive or dry skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review