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

Texture Enhancer

Dextrin Behenate

Dextrin Behenate

4.0

A gentle, starch-based ingredient that gives products a silky, non-greasy feel and helps stabilize formulas.

Irritation

low

Source

semi-synthetic

beautyskincaretexturizer
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Emulsifier

Dextrin Isostearate

DEXTRIN ISOSTEARATE

4.0

A gentle, plant-based emulsifier that improves product texture and stability with a low risk of irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Dextrin Laurate

Dextrin Laurate

4.3

A mild, effective emulsifier that helps create stable, creamy textures without common irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Dextrin Myristate

Dextrin Myristate

4.0

A mild, starch-derived emulsifier that improves product feel and stability without common irritation concerns.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Dextrin Palmitate

Dextrin Palmitate

4.0

A gentle, starch-derived ingredient that improves product feel and stability without common irritation concerns.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Texture Enhancer

Dextrin Palmitate/Stearate

Dextrin Palmitate/Stearate

4.0

A gentle, starch-based ingredient that improves the feel and stability of products without common irritation concerns.

Irritation

low

Source

semi-synthetic

beautyskincaretexturizer
Read ingredient review

Emulsifier

Dextrin Stearate

Dextrin Stearate

4.0

A gentle, plant-based emulsifier that gives creams a silky feel without clogging pores or irritating skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Emollient

DHA/DPA/Oleic/Palmitic Triglyceride

DOCOSAHEXENOIC/DOCOSAPENTENOIC/OLEIC/PALMITIC TRIGLYCERIDE

4.0

A nourishing blend of omega fatty acids that helps soften skin and strengthen the moisture barrier without feeling greasy.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Di-C12-13 Alkyl Malate

DI-C12-13 ALKYL MALATE

4.0

A lightweight, non-greasy emollient that helps products spread smoothly and leaves skin feeling soft without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Di-C12-13 Alkyl Tartrate

DI-C12-13 ALKYL TARTRATE

4.0

A lightweight, non-greasy emollient that helps soften skin and improve product texture without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Di-C12-15 Alkyl Adipate

DI-C12-15 ALKYL ADIPATE

4.0

A lightweight synthetic emollient that softens skin without clogging pores, ideal for oily or combination skin types.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Antistatic Agent

Di-C12-15 Alkyl Dimonium Chloride

DI-C12-15 ALKYL DIMONIUM CHLORIDE

3.5

A synthetic conditioning agent that reduces static and softens hair, but may cause irritation for sensitive scalps at high concentrations.

Irritation

moderate

Source

synthetic

beautyskincarehaircare
Read ingredient review

Emollient

Di-C12-15 Alkyl Fumarate

DI-C12-15 ALKYL FUMARATE

4.0

A lightweight, non-greasy emollient that helps soften skin and improve product texture with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Di-C12-15 Alkyl Maleate

DI-C12-15 ALKYL MALEATE

4.0

A lightweight, non-greasy emollient that helps products spread smoothly and leaves skin feeling soft without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Surfactant

Di-C12-15 Pareth-10 Phosphate

DI-C12-15 PARETH-10 PHOSPHATE

4.0

A gentle, phosphate-based surfactant that helps cleanse without stripping the skin, making it a good choice for sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Di-C12-15 Pareth-4 Phosphate

DI-C12-15 PARETH-4 PHOSPHATE

3.8

A mild synthetic surfactant that helps cleansers foam and rinse cleanly, but may be slightly drying for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Surfactant

Di-C12-15 Pareth-6 Phosphate

DI-C12-15 PARETH-6 PHOSPHATE

3.8

A mild synthetic surfactant that helps cleanse without stripping, but may cause irritation in sensitive skin at high concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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Antistatic Agent

Di-C12-18 Alkyl Dimonium Chloride

DI-C12-18 ALKYL DIMONIUM CHLORIDE

3.5

A synthetic conditioner that reduces static and softens hair, but may cause irritation or clog pores in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarehaircare
Read ingredient review

Emollient

Di-C14-15 Alkyl Tartrate

DI-C14-15 ALKYL TARTRATE

4.0

A gentle, non-greasy emollient that helps soften skin and improve product texture without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Antistatic Agent

Di-C14-18 Alkyl Dimonium Chloride

DI-C14-18 ALKYL DIMONIUM CHLORIDE

3.8

A synthetic conditioning agent that reduces static and softens hair, but may be too heavy for fine or oily hair and can cause irritation in sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarehaircaresurfactant
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Emollient

Di-C16-18 Alkyl Dimer Dilinoleate

DI-C16-18 ALKYL DIMER DILINOLEATE

4.0

A gentle, plant-based emollient that makes skin feel smooth and soft without clogging pores—great for sensitive or oily skin types.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Film Former

Di-PEG-2 Soyamine IPDI

DI-PEG-2 SOYAMINE IPDI

3.5

A synthetic polymer that helps hair feel smooth and reduces frizz, but it's not a moisturizer or repair ingredient.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Emollient

Di-PPG-2 Myreth-10 Adipate

DI-PPG-2 MYRETH-10 ADIPATE

3.8

A synthetic emollient that helps skincare products feel silky and spread easily, with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emollient

Di-PPG-3 Ceteth-4 Adipate

DI-PPG-3 CETETH-4 ADIPATE

4.0

A gentle synthetic emollient that helps skincare products feel silky and spread easily without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

UV Filter

Di-T-Butyl Hydroxybenzylidene Camphor

DI-T-BUTYL HYDROXYBENZYLIDENE CAMPHOR

3.5

A synthetic UV filter that protects skin from sun damage, but its use is limited by regional regulations and potential environmental concerns.

Irritation

low

Source

synthetic

beautyskincaresunscreen
Read ingredient review

Surfactant

Di-TEA-Cocamide Diacetate

DI-TEA-COCAMIDE DIACETATE

3.8

A mild coconut-derived cleansing agent that helps create a rich lather without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
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Surfactant

Di-TEA-Palmitoyl Aspartate

DI-TEA-PALMITOYL ASPARTATE

3.5

A mild synthetic surfactant that helps cleanse without stripping the skin, but it's not a standout ingredient on its own.

Irritation

low

Source

synthetic

beautyskincarecleansing
Read ingredient review

Humectant

Diacetin

DIACETIN

4.0

Diacetin is a gentle humectant that helps keep skin hydrated and can improve the feel of skincare products.

Irritation

low

Source

synthetic

beautyskincarehumectant
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Solvent

Diacetone Alcohol

Diacetone Alcohol

3.5

Diacetone alcohol is a synthetic solvent that helps dissolve other ingredients, but it can be drying and may cause irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresolvent
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Fragrance Ingredient

Diacetyl

DIACETYL

2.5

Diacetyl adds a buttery scent to cosmetics but is controversial due to respiratory risks from inhalation, especially in aerosolized products.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
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Skin conditioning agent

Diacetyl Benzoyl Lathyrol

DIACETYL BENZOYL LATHYROL

3.5

An emerging semi-synthetic ingredient that may help support skin barrier function, but research is still limited.

Irritation

low

Source

semi-synthetic

beautyskincareconditioning agent
Read ingredient review

Antioxidant

Diacetyl Boldine

DIACETYL BOLDINE

4.0

A gentle antioxidant derived from boldo tree extract that may help calm skin and fight free radical damage.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Antioxidant

Diacetyl Resveratryl Thioctate

DIACETYLRESVERATRYL THIOCTATE

3.8

A hybrid antioxidant that pairs resveratrol with alpha-lipoic acid for enhanced stability and skin penetration, but clinical research is still limited.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Antioxidant

Diacetylcurcumin

Diacetylcurcumin

3.8

A stable, potent antioxidant derived from turmeric that may help brighten skin and fight free radicals, but human studies are limited.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Antimicrobial

Diallyl Sulfide

DIALLYL SULPHIDE

3.5

Diallyl sulfide is a natural sulfur compound with antimicrobial potential, but its strong odor and limited skincare research make it a niche ingredient.

Irritation

moderate

Source

natural

beautyskincareantimicrobial
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Buffering Agent

Diammonium Citrate

DIAMMONIUM CITRATE

4.0

Diammonium Citrate is a safe, low-irritation pH adjuster that helps keep your skincare products stable and gentle on skin.

Irritation

low

Source

synthetic

beautyskincarepH adjuster
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Chelating Agent

Diammonium Ferric Pentetate

DIAMMONIUM FERRIC PENTETATE

3.5

A behind-the-scenes stabilizer that helps keep your products fresh and effective by neutralizing trace metals.

Irritation

low

Source

synthetic

beautyskincarestabilizer
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Surfactant

Diammonium Lauryl Sulfosuccinate

DIAMMONIUM LAURYL SULFOSUCCINATE

4.0

A gentle, sulfate-free surfactant that cleanses effectively with low irritation potential, ideal for sensitive or dry skin.

Irritation

low

Source

synthetic

beautyskincarecleanser
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pH Adjuster

Diammonium Phosphate

DIAMMONIUM PHOSPHATE

3.5

Diammonium phosphate is a safe, low-irritation pH adjuster that helps keep your products stable and effective, but it offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincarepH adjuster
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Antioxidant

Diamylhydroquinone

Diamylhydroquinone

3.5

Diamylhydroquinone is a synthetic antioxidant that helps keep oils and lip products from going rancid, but it's not a star active for skin benefits.

Irritation

low

Source

synthetic

beautyskincareantioxidant
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Exfoliant

Diatomaceous Earth

SOLUM DIATOMEAE

3.8

A natural, gritty powder that gently scrubs away dead skin and soaks up excess oil, but can be too harsh for sensitive or broken skin.

Irritation

moderate

Source

natural

beautyskincareexfoliant
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Preservative

Diazolidinyl Urea

DIAZOLIDINYL UREA

3.5

An effective preservative that can release formaldehyde, making it a potential irritant for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
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Antistatic Agent

Dibehenoylethyl Dimonium Chloride

Dibehenoylethyl Dimonium Chloride

4.0

A mild, plant-derived conditioning ingredient that smooths hair without heavy buildup, suitable for fine or sensitive hair.

Irritation

low

Source

semi-synthetic

beautyskincareconditioning agent
Read ingredient review