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 1,097
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

Surfactant

Deceth-3

DECETH-3

3.8

Deceth-3 is a gentle synthetic surfactant that helps cleansers foam and rinse cleanly without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Deceth-4

DECETH-4

3.8

Deceth-4 is a mild synthetic surfactant that helps cleansers foam and rinse cleanly, but it may cause slight dryness for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Deceth-4 Phosphate

DECETH-4 PHOSPHATE

4.0

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Deceth-5

DECETH-5

3.5

Deceth-5 is a synthetic emulsifier that helps mix water and oil, but it may be mildly irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Deceth-6

DECETH-6

3.8

Deceth-6 is a synthetic surfactant that helps cleansers foam and rinse clean, but it may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Deceth-6 Phosphate

DECETH-6 PHOSPHATE

4.0

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Deceth-8

DECETH-8

3.8

Deceth-8 is a mild cleansing agent that helps foaming and emulsifying, but may cause irritation in sensitive skin at high concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Deceth-9

DECETH-9

3.8

Deceth-9 is a synthetic cleansing agent that helps remove dirt and oil, but may be drying or irritating for sensitive skin in high concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Deceth-9 Phosphate

DECETH-9 PHOSPHATE

3.8

A mild synthetic cleanser that helps remove dirt and oil without stripping the skin, but may cause irritation for very sensitive skin types.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Decyl Glucoside

Decyl Glucoside

4.5

A gentle, plant-based surfactant that effectively cleanses without stripping the skin's natural moisture barrier.

Irritation

low

Source

natural

beautyskincaresurfactant
Read ingredient review

Surfactant

Decylamine Oxide

Decylamine Oxide

4.0

A gentle surfactant that helps create rich foam and thicken formulas without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Decyltetradeceth-10

DECYLTETRADECETH-10

4.0

A gentle synthetic emulsifier that helps mix water and oil in your skincare products without causing irritation or clogging pores.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Decyltetradeceth-15

DECYLTETRADECETH-15

4.0

A gentle synthetic emulsifier that helps create stable, creamy formulas without common irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Decyltetradeceth-20

DECYLTETRADECETH-20

4.0

A gentle synthetic emulsifier that helps mix oil and water in products, with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

DEDM Hydantoin Dilaurate

DEDM Hydantoin Dilaurate

3.5

A mild synthetic surfactant that helps foaming and cleansing, but may cause irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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
Read ingredient review

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
Read ingredient review

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
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
Read ingredient review

Emulsifier

Diceteareth-10 Phosphate

DICETEARETH-10 PHOSPHATE

3.5

A mild synthetic emulsifier that helps mix water and oil in creams and cleansers, generally considered safe for most skin types.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Antistatic Agent

Dicocodimonium Chloride

Dicocodimonium Chloride

3.5

Dicocodimonium Chloride is a synthetic conditioning agent that reduces static and softens hair, but may cause irritation or clog pores in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarehaircaresurfactant
Read ingredient review

Surfactant

Diethanolamine Oleamide

DIETHANOLAMINOOLEAMIDE DEA

3.0

An effective foam booster that has raised safety concerns due to possible diethanolamine (DEA) contamination; best used in rinse-off products if at all.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Diethylhexyl Sodium Sulfosuccinate

DIETHYLHEXYL SODIUM SULFOSUCCINATE

3.8

An effective synthetic cleanser that helps remove oil and dirt, but may be drying or irritating for sensitive skin types.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Dihexyl Sodium Sulfosuccinate

DIHEXYL SODIUM SULFOSUCCINATE

3.8

An effective cleansing agent that can be drying for some skin types, but generally safe when formulated properly.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Dihydrogenated Tallow Methylamine

Dihydrogenated Tallow Methylamine

3.5

An effective conditioning agent for dry or damaged hair, but may be too heavy for fine hair or oily skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarehaircaresurfactant
Read ingredient review

Surfactant

Dihydroxyethyl Cocoamine Oxide

DIHYDROXYETHYL COCAMINE OXIDE

4.0

A gentle, coconut-derived surfactant that helps create a rich lather while being less stripping than traditional sulfates.

Irritation

low

Source

natural

beautyskincaresurfactant
Read ingredient review

Surfactant

Dihydroxyethyl Tallowamine HCl

Dihydroxyethyl Tallowamine HCl

3.0

An effective cleanser and antistatic agent from tallow, but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Dihydroxyisopropyl Palmoylpalmamide

DIHYDROXYISOPROPYL PALMOYLPALMAMIDE

3.5

A mild synthetic surfactant that helps create rich foam and improve cleansing texture, generally well-tolerated by most skin types.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Dihydroxypropyl N-Methyllauramide

DIHYDROXYPROPYL N-METHYLLAURAMIDE

4.0

A gentle, low-irritation surfactant that helps create a rich lather and improve cleansing without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Dilaureth-10 Phosphate

DILAURETH-10 PHOSPHATE

4.0

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Dilaureth-4 Phosphate

DILAURETH-4 PHOSPHATE

3.8

An effective synthetic surfactant that helps cleanse and emulsify, but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Dilaureth-7 Citrate

DILAURETH-7 CITRATE

4.0

A gentle, citrate-based surfactant that helps cleanse without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Dimethicone PEG-7 Cocoate

DIMETHICONE PEG-7 COCOATE

4.0

A gentle silicone-coconut hybrid that helps mix oil and water, leaving skin and hair feeling soft without heavy residue.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Dimethicone PEG-7 Sulfate

Dimethicone PEG-7 Sulfate

3.8

A gentle silicone-based cleanser that helps remove dirt and oil while leaving hair and skin feeling soft, but may not suit those avoiding silicones.

Irritation

low

Source

semi-synthetic

beautyskincarehaircaresurfactant
Read ingredient review

Surfactant

Dimethyl Cocamine

DIMETHYL COCAMINE

3.5

A coconut-derived surfactant that helps cleanse and condition, but may cause mild irritation for sensitive skin.

Irritation

moderate

Source

natural

beautyskincaresurfactant
Read ingredient review

Foam Booster

Dimethyl Lauramide/Myristamide

Dimethyl Lauramide/Myristamide

3.5

A synthetic foam booster that improves lather and thickness in cleansers, but may cause irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Dimethyl Lauramine

Dimethyl Lauramine

3.5

Dimethyl Lauramine is a synthetic emulsifier and pH adjuster that helps blend oil and water in rinse-off cleansers, but it may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Dimethyl Lauramine Oleate

Dimethyl Lauramine Oleate

3.5

A synthetic emulsifier that helps mix oil and water, but may be slightly drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Dimethyl Myristamine

Dimethyl Myristamine

3.5

An effective emulsifier and surfactant for rinse-off products, but may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Dimethyl Palmitamine

Dimethyl Palmitamine

3.5

A synthetic conditioning agent that helps soften hair and stabilize formulas, but may cause irritation in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Dimethyl Soyamine

Dimethyl Soyamine

3.5

A plant-derived emulsifier that helps blend oils and water, but may cause irritation or clog pores in sensitive individuals.

Irritation

moderate

Source

natural

beautyskincaresurfactant
Read ingredient review

Surfactant

Dinonoxynol-4 Phosphate

DINONOXYNOL-4 PHOSPHATE

3.5

A synthetic cleansing agent that helps remove dirt and oil, but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Antistatic Agent

Dioleoyle Detolmonium Methosulfate

DIOLEOYL EDETOLMONIUM METHOSULFATE

3.5

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

Irritation

moderate

Source

synthetic

beautyskincarehaircaresurfactant
Read ingredient review

Surfactant

Dioleth-8 Phosphate

Dioleth-8 Phosphate

3.8

A synthetic emulsifier that helps cleanse and stabilize formulas, but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Dioleyl Phosphate

DIOLEYL PHOSPHATE

3.8

Dioleyl Phosphate is a mild synthetic emulsifier that helps blend oil and water in formulas, generally considered safe and low-irritation for most skin types.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Antistatic Agent

Dipalmitoylethyl Dimonium Chloride

Dipalmitoylethyl Dimonium Chloride

3.8

A gentle conditioning ingredient that reduces static and softens hair, but may be too heavy for fine or oily hair types.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Disodium Isostearoamphodipropionate

DISODIUM ISOSTEAROAMPHODIPROPIONATE

4.0

A gentle, low-irritation surfactant that cleanses without stripping the skin barrier, making it ideal for sensitive or dry skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Disodium Lauriminodipropionate

Disodium Lauriminodipropionate

4.0

A gentle, low-irritation surfactant that effectively cleanses without stripping the skin's natural moisture barrier.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review