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 1,375
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

Hair Conditioning Agent

Dimethicone PG-Diethylmonium Chloride

Dimethicone PG-Diethylmonium Chloride

3.8

A silicone-based conditioning ingredient that smooths hair and reduces static, but may build up on fine or low-porosity hair over time.

Irritation

low

Source

synthetic

beautyhaircareconditioning agent
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Conditioning Agent

Dimethicone Propyl PG-Betaine

Dimethicone Propyl PG-Betaine

4.0

A gentle silicone derivative that conditions hair and skin without the heavy feel of traditional silicones.

Irritation

low

Source

synthetic

beautyskincarehaircareconditioning agent
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Emollient

Dimethiconol

Dimethiconol

4.0

Dimethiconol is a gentle silicone that smooths skin and hair without clogging pores, making it a safe choice for most skin types.

Irritation

low

Source

synthetic

beautyskincarehaircareemollient
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Hair Conditioner

Dimethiconol Arginine

Dimethiconol Arginine

3.8

A gentle silicone-arginine hybrid that smooths hair and skin without heavy buildup, but may not suit those avoiding silicones entirely.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
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Skin conditioner

Dimethiconol Borageate

Dimethiconol Borageate

4.0

A gentle silicone-oil hybrid that smooths skin and hair without heavy greasiness, with added fatty acid benefits from borage oil.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
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Hair Conditioning Agent

Dimethiconol Cysteine

Dimethiconol Cysteine

3.8

A silicone-cysteine hybrid that helps smooth hair and reduce frizz with a lighter feel than traditional silicones.

Irritation

low

Source

semi-synthetic

beautyhaircareconditioning agent
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Emollient

Dimethiconol Isostearate

Dimethiconol Isostearate

4.0

A gentle silicone ester that smooths skin and hair without heavy greasiness, but offers limited active benefits beyond surface feel.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
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Skin Conditioning Agent

Dimethiconol Meadowfoamate

Dimethiconol Meadowfoamate

4.0

A gentle, silicone-based emollient that softens skin and hair without greasiness, ideal for dry or sensitive types.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
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Hair Conditioner

Dimethiconol Methionine

Dimethiconol Methionine

4.0

A gentle silicone-amino acid hybrid that smooths hair and softens skin without heavy buildup.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
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Conditioning Agent

Dimethiconol Panthenol

Dimethiconol Panthenol

4.0

A gentle silicone-panthenol hybrid that smooths hair and skin while adding a touch of moisture, but may feel heavy for fine hair or oily skin.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
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Absorbent

Dimethiconol/Silica Crosspolymer

DIMETHICONOL/SILICA CROSSPOLYMER

4.0

A silicone powder that soaks up excess oil and gives a silky, non-greasy feel—great for shine control and blurring pores.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
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Antistatic Agent

Dimethyl Behenamine

Dimethyl Behenamine

4.0

A gentle conditioning ingredient that helps detangle hair and soften skin without heavy buildup.

Irritation

low

Source

semi-synthetic

beautyskincarehaircareconditioning agent
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UV Filter

Dimethyl PABA Ethyl Cetearyldimonium Tosylate

Dimethyl PABA Ethyl Cetearyldimonium Tosylate

3.5

A synthetic UV filter and conditioner with moderate safety concerns; less common in modern formulations due to potential irritation and environmental persistence.

Irritation

moderate

Source

synthetic

beautyskincarehaircare
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Film Former

Dimethylamine/Epichlorohydrin Copolymer

DIMETHYLAMINE/ETHYLENEDIAMINE/EPICHLOROHYDRIN COPOLYMER

3.5

A synthetic polymer that helps hair feel smooth and products spread evenly, but it's not a standout ingredient and may cause buildup with frequent use.

Irritation

low

Source

synthetic

beautyskincarehaircarefilm-former
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Hair Conditioning Agent

Dimethylaminoethyl Rice Branate

Dimethylaminoethyl Rice Branate

4.0

A gentle, rice-derived conditioning ingredient that helps detangle hair and soften skin without heavy buildup.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
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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
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Antistatic Agent

Dioleoylisopropyl Dimonium Methosulfate

Dioleoylisopropyl Dimonium Methosulfate

3.8

A synthetic conditioning agent that helps reduce static and improve softness in hair and skin, but may feel heavy for very fine hair.

Irritation

low

Source

synthetic

beautyskincarehaircareconditioning agent
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Film Former

Diphenyl Dimethicone

Diphenyl Dimethicone

4.0

A gentle silicone that improves product feel and spreadability without clogging pores or causing irritation.

Irritation

low

Source

synthetic

beautyskincarehaircare
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Skin Conditioner

Diphenylisopropyl Dimethicone

Diphenylisopropyl Dimethicone

4.0

A gentle silicone that makes products feel silky and spread easily, with a very low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincarehaircare
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Solvent

Disiloxane

Disiloxane

3.8

Disiloxane is a fast-evaporating silicone that helps products glide on smoothly without leaving a heavy residue.

Irritation

low

Source

synthetic

beautyskincarehaircare
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Antistatic Agent

Disoydimonium Chloride

Disoydimonium Chloride

3.8

A gentle conditioning ingredient that reduces static and softens hair without heavy buildup.

Irritation

low

Source

synthetic

beautyskincarehaircareconditioning agent
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Antistatic Agent

Distearyl Epoxypropylmonium Chloride

DISTEARYL EPOXYPROPYLMONIUM CHLORIDE

3.5

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

Irritation

moderate

Source

synthetic

beautyskincarehaircare
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Film Former

Distearyl Phthalic Acid Amide

DISTEARYL PHTHALIC ACID AMIDE

3.5

A synthetic film-former that helps products spread smoothly and hold their shape, but it has limited research and is not widely used.

Irritation

low

Source

synthetic

beautyskincarehaircare
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Hair Conditioning Agent

Distearyldimethylamine Dilinoleate

DISTEARYLDIMETHYLAMINE DILINOLEATE

4.0

A gentle synthetic conditioner that softens hair and skin without heavy buildup, but its synthetic origin may not appeal to all.

Irritation

low

Source

synthetic

beautyskincarehaircare
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