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 66
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

Emollient

Bis-Diphenylethyl Disiloxane

BIS-DIPHENYLETHYL DISILOXANE

4.0

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

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Bis-Ethyl Ethyl Methicone

BIS-ETHYL ETHYL METHICONE

4.2

A gentle silicone that helps products glide on smoothly without clogging pores, making it a good choice for oily or sensitive skin.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Film Former

Bis-Hydroxyethoxypropyl Dimethicone

Bis-Hydroxyethoxypropyl Dimethicone

4.0

A gentle silicone that gives skin a silky, smooth feel without clogging pores, commonly used to improve product texture and spreadability.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Bis-Hydroxypropyl Dimethicone

Bis-Hydroxypropyl Dimethicone

4.0

A gentle silicone that improves product feel and skin softness, widely considered safe and non-irritating for most skin types.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Humectant

Bis-PCA Dimethicone

BIS-PCA DIMETHICONE

4.0

A gentle silicone that hydrates and smooths skin without a heavy or greasy feel.

Irritation

low

Source

semi-synthetic

beautyskincaresilicone
Read ingredient review

Skin conditioning agent

Bis-Phenylpropyl Dimethicone

BIS-PHENYLPROPYL DIMETHICONE

4.0

A gentle silicone that gives products a silky feel and helps them glide on smoothly without clogging pores.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Bis-Stearyl Dimethicone

Bis-Stearyl Dimethicone

4.0

A gentle silicone that gives a silky, smooth feel to products without clogging pores or causing irritation.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Skin conditioner

Caprylyl Methicone

Caprylyl Methicone

4.3

A gentle, non-greasy silicone that improves product feel and spreadability, suitable for most skin types.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Cerotyl Dimethicone

Cerotyl Dimethicone

4.0

A gentle silicone that smooths skin and reduces friction without clogging pores, making it a reliable texture enhancer for many formulas.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Cetearyl Dimethicone

CETEARYL DIMETHICONE

4.0

A gentle silicone that improves product feel and skin softness with a very low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Cycloethoxymethicone

Cycloethoxymethicone

3.8

A gentle silicone that improves product feel and spreadability with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Cyclotetrasiloxane

CYCLOTETRASILOXANE

3.5

A volatile silicone that gives a silky feel and helps products spread smoothly, but its environmental persistence has raised regulatory concerns in some regions.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Solvent

Cyclotrisiloxane

Cyclotrisiloxane

3.5

A fast-evaporating silicone that gives a smooth, silky finish but has raised some environmental and safety questions.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Cyclovinylmethicone

Cyclovinylmethicone

3.8

A lightweight silicone that gives a silky, smooth feel without heavy residue, but its environmental persistence raises concerns.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Film Former

Dimethicone Crosspolymer

Dimethicone Crosspolymer

4.3

A gentle silicone that gives a smooth, matte finish without clogging pores — great for oily or combination skin.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Film Former

Dimethicone Silylate

Dimethicone Silylate

4.0

A gentle silicone that gives a silky, smooth feel to products without clogging pores or causing irritation.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Skin conditioning agent

Ethyl Methicone

Ethyl Methicone

4.0

A gentle silicone that gives skin a smooth, non-greasy finish without clogging pores.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Glyceryl Diethylsiloxane

GLYCERYL DIETHYLSILOXANES

3.5

A gentle silicone that helps products glide on smoothly without clogging pores, but offers minimal active skincare benefits.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Solvent

Hexamethyldisiloxane

Hexamethyldisiloxane

4.0

A lightweight, fast-evaporating silicone that improves product feel and spreadability without clogging pores.

Irritation

low

Source

synthetic

beautyskincaresiliconesolvent
Read ingredient review

Emollient

Hexyl Dimethicone

Hexyl Dimethicone

4.0

Hexyl Dimethicone is a gentle silicone that improves product feel and spreadability, making it a common choice for smooth, non-greasy formulations.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Hexyl Methicone

Hexyl Methicone

4.0

Hexyl Methicone is a gentle silicone that smooths skin and reduces tackiness, making it a popular choice for lightweight, non-greasy formulas.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Lauryl Dimethicone

Lauryl Dimethicone

4.0

A lightweight silicone that improves product feel and spreadability, generally well-tolerated by most skin types.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Myristyl Methicone

Myristyl Methicone

4.0

A gentle silicone that smooths skin and helps products glide on without clogging pores.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Film Former

PCA Dimethicone

PCA Dimethicone

4.0

A gentle, silicone-based ingredient that helps skin feel smooth and hydrated without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincaresilicone
Read ingredient review

Film Former

PCA Dimethicone Crosspolymer

PCA Dimethicone/Bis-Vinyldimethicone Crosspolymer

4.0

A silicone powder that gives a silky, blurring finish and helps control shine without clogging pores.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

PEG-8 Methicone

PEG-8 Methicone

4.0

A lightweight silicone that smooths skin and hair without clogging pores, but may not suit those avoiding silicones entirely.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

PEG/PPG-28/21 Acetate Dimethicone

PEG/PPG-28/21 Acetate Dimethicone

4.0

A gentle silicone that improves texture and feel in skincare and haircare, but may not suit those avoiding silicones.

Irritation

low

Source

semi-synthetic

beautyskincarehaircaresilicone
Read ingredient review

Emollient

PEG/PPG-5/3 Trisiloxane

PEG/PPG-5/3 Trisiloxane

4.0

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

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Skin Conditioning Agent

Phenethyl Disiloxane

PHENETHYL DISILOXANE

4.0

A lightweight silicone that gives a silky, non-greasy feel and helps other ingredients spread smoothly on skin.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Skin conditioner

Phenyl Dimethicone

Phenyl Dimethicone

4.0

A gentle silicone that gives skin a smooth, velvety finish without clogging pores.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Phenyl Propyl Trimethicone

PHENYL PROPYL TRIMETHICONE

4.3

A gentle silicone that makes skin feel silky and smooth without clogging pores, ideal for improving product texture and wear.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

PPG-25 Dimethicone

PPG-25 Dimethicone

4.0

A gentle silicone that improves product feel and spreadability without clogging pores, but may not suit those avoiding silicones.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Skin conditioner

Propyl Trimethicone

Propyl Trimethicone

4.0

A gentle silicone that makes products feel silky and helps them glide on without clogging pores.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Anti-foaming Agent

Simethicone

Simethicone

4.0

Simethicone is a gentle silicone that helps prevent foam and bubbles in products, but it offers no active skincare benefits and may feel heavy on some skin types.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Stearoxytrimethylsilane

Stearoxytrimethylsilane

4.0

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

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Emollient

Stearyl Dimethicone

Stearyl Dimethicone

4.0

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

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review

Skin conditioning

Trifluoropropyl Cyclopentasiloxane

TRIFLUOROPROPYL CYCLOPENTASILOXANE

3.8

A lightweight fluorinated silicone that enhances product feel and spreadability, but its environmental persistence raises concerns.

Irritation

low

Source

synthetic

beautyskincaresilicone
Read ingredient review