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

Emulsifier

PEG-6 Almond Glycerides

PEG-6 Almond Glycerides

4.0

A mild, semi-synthetic emulsifier that helps blend water and oil in skincare products while providing light skin conditioning.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-6 Butylene Glycol Laurate

PEG-6 Butylene Glycol Laurate

3.8

A gentle synthetic emulsifier that helps mix water and oil in your products, but may not suit those avoiding PEGs.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PEG-6 Caprylate/Caprate

PEG-6 Caprylate/Caprate

4.0

A gentle, water-friendly emollient that helps products spread smoothly without leaving a greasy feel.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PEG-6 Caprylic/Capric Glycerides

PEG-6 CAPRYLIC/CAPRIC GLYCERIDES

4.0

A gentle, water-soluble emulsifier that helps blend oil and water in skincare formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PEG-6 Cocamide

PEG-6 Cocamide

3.8

A mild cleansing agent that helps create foam and lift dirt, but may be slightly drying for very sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-6 Cocamide Phosphate

PEG-6 Cocamide Phosphate

3.5

A mild cleansing agent that helps remove dirt and oil, but may be slightly drying for very sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Emulsifier

PEG-6 Diisostearate

PEG-6 Diisostearate

4.0

A reliable synthetic emulsifier that helps mix oil and water in your products, generally considered safe and non-irritating at typical levels.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-6 Dilaurate

PEG-6 Dilaurate

3.8

PEG-6 Dilaurate is a gentle synthetic emulsifier that helps mix water and oil in your products, but it may not be ideal for very sensitive or compromised skin.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-6 Dioleate

PEG-6 Dioleate

3.5

A safe, effective emulsifier that helps mix oil and water in your skincare, but it's synthetic and may not suit those avoiding PEGs.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-6 Distearate

PEG-6 Distearate

3.5

A safe, widely used emulsifier that helps keep your products smooth and stable, but it's synthetic and may not appeal to those seeking natural-only formulas.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PEG-6 Glyceryl Caprate

PEG-6 Glyceryl Caprate

4.0

A gentle, water-friendly emollient that helps products spread smoothly without leaving a greasy feel.

Irritation

low

Source

semi-synthetic

beautyskincareemollientsurfactant
Read ingredient review

Emulsifier

PEG-6 Glyceryl Isostearate

PEG-6 Glyceryl Isostearate

4.0

A gentle emulsifier that helps create stable, creamy textures without heavy irritation or clogging.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-6 Glyceryl Tristearate

PEG-6 Glyceryl Tristearate

4.0

A gentle, PEG-based emulsifier that helps create stable, creamy textures in skincare without significant irritation or pore-clogging risk.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-6 Hydrogenated Castor Oil

PEG-6 Hydrogenated Castor Oil

4.0

A gentle emulsifier that helps oils and water mix, making cleansers and toners feel smooth without heavy residue.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PEG-6 Isolaureth-6

PEG-6 ISOLAURYL THIOETHER

3.8

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-6 Isopalmitate

PEG-6 Isopalmitate

3.8

A reliable synthetic emulsifier that helps mix water and oil, but may not suit those avoiding PEGs.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-6 Isostearate

PEG-6 Isostearate

3.8

PEG-6 Isostearate is a safe, widely used emulsifier that helps mix oil and water, but it may be less suitable for those avoiding PEG compounds.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PEG-6 Lanolate

PEG-6 Lanolate

3.8

A gentle, lanolin-derived emollient that helps moisturize and stabilize products, but may be comedogenic for some.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Surfactant

PEG-6 Lauramide

PEG-6 Lauramide

3.5

PEG-6 Lauramide is a synthetic cleansing agent that helps remove dirt and oil, but may be slightly drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-6 Laurate

PEG-6 Laurate

3.8

PEG-6 Laurate is a common emulsifier that helps mix oil and water, but may be mildly irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-6 Laurate/Tartrate

PEG-6 Laurate/Tartrate

3.5

A gentle synthetic emulsifier that helps mix water and oil in skincare products, generally well-tolerated but not a standout active ingredient.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PEG-6 Methicone Acetate

PEG-6 METHICONE ACETATE

4.0

A gentle silicone derivative that improves product feel and spreadability without heavy residue, suitable for most skin types.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Humectant

PEG-6 Methyl Ether

PEG-6 Methyl Ether

4.0

A gentle synthetic humectant that helps keep skin hydrated and improves product feel without common irritation.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Emulsifier

PEG-6 Oleamide

PEG-6 OLEAMIDE

3.5

PEG-6 Oleamide is a synthetic emulsifier that helps mix oil and water in cleansers and lotions, but it may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PEG-6 Oleamine

PEG-6 Oleamine

3.5

PEG-6 Oleamine is a synthetic emulsifier that helps mix oil and water, but it may be mildly irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-6 Oleate

PEG-6 Oleate

3.5

PEG-6 Oleate is a safe, widely used emulsifier that helps products feel smooth and spread evenly, but it may be less ideal for very sensitive or compromised skin due to potential penetration enhancement.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-6 Olive Glycerides

PEG-6 OLIVE GLYCERIDES

4.0

A gentle, olive-derived emulsifier that helps blend oil and water in skincare formulas without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-6 Palm Esters

HYDROGENATED PALM/PALM KERNEL OIL PEG-6 ESTERS

3.5

A gentle emulsifier that helps create stable, creamy textures, but its palm-derived origin raises sustainability concerns.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-6 Palmitate

PEG-6 Palmitate

3.5

A reliable emulsifier that helps products feel smooth, but may not suit those avoiding all PEGs.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-6 PPG-7 Ethylhexyl Ether

PEG-6 PPG-7 Ethylhexyl Ether

3.8

A gentle synthetic emulsifier that helps mix oil and water in skincare, but may not suit those avoiding all PEG compounds.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-6 Sorbitan Oleate

PEG-6 Sorbitan Oleate

3.8

A gentle emulsifier that helps mix water and oil, generally well-tolerated but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-6 Sorbitan Stearate

PEG-6 Sorbitan Stearate

4.0

A gentle, widely used emulsifier that helps keep your lotions and creams smooth and stable without irritating most skin types.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PEG-6 Stearyl Guanidine

PEG-6 Stearyl Guanidine

3.8

A synthetic conditioning agent that helps hair feel soft and smooth, but its safety data is limited compared to more common alternatives.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Surfactant

PEG-6 Undecylenate

PEG-6 Undecylenate

3.8

A gentle cleansing and odor-fighting ingredient that helps keep products stable and skin fresh, but may not suit ultra-sensitive skin in high concentrations.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Emollient

PEG-60 Almond Glycerides

PEG-60 ALMOND GLYCERIDES

4.0

A gentle, water-friendly emollient that softens skin and improves rinse-off product feel without heavy residue.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PEG-60 Castor Oil

PEG-60 Castor Oil

4.0

PEG-60 Castor Oil is a versatile, low-irritation emulsifier that helps mix oil and water in cleansers and makeup removers, but may not suit those avoiding PEG compounds.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-60 Corn Glycerides

PEG-60 Corn Glycerides

4.0

A gentle emulsifier that helps blend oil and water in skincare formulas, with a low risk of irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-60 Glyceryl Diisostearate

PEG-60 Glyceryl Diisostearate

4.0

A reliable synthetic emulsifier that helps create smooth, stable creams and lotions with low irritation potential.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-60 Glyceryl Isostearate

PEG-60 Glyceryl Isostearate

3.8

A reliable emulsifier that helps create stable, creamy formulas, but may be too heavy for very oily or acne-prone skin.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-60 Glyceryl Stearate

PEG-60 Glyceryl Stearate

4.0

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-60 Glyceryl Trioleate

PEG-60 Glyceryl Trioleate

3.8

PEG-60 Glyceryl Trioleate is a gentle emulsifier that helps blend oil and water in cleansers and makeup removers, but its PEG component raises mild environmental and purity concerns.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PEG-60 Hydrogenated Castor Oil

PEG-60 Hydrogenated Castor Oil

3.8

A versatile emulsifier that helps blend oil and water, but may irritate sensitive or acne-prone skin at high concentrations.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-60 Lanolin

PEG-60 Lanolin

3.8

A gentle, water-friendly lanolin derivative that helps blend oil and water in formulas without the heavy feel of traditional lanolin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-60 Passionflower Seed Glycerides

PEG-60 PASSIFLORA INCARNATA SEED GLYCERIDES

4.0

A gentle, semi-synthetic emulsifier that helps blend oil and water in skincare products while providing mild skin conditioning from passionflower seed oil.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PEG-60 Shea Butter Glycerides

PEG-60 Shea Butter Glycerides

4.0

A gentle, water-soluble shea butter derivative that moisturizes without clogging pores, ideal for sensitive and acne-prone skin.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PEG-60 Sorbitan Stearate

PEG-60 Sorbitan Stearate

4.0

A gentle, water-loving emulsifier that helps create stable, non-greasy lotions and creams.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-60 Sorbitan Tetraoleate

PEG-60 Sorbitan Tetraoleate

3.5

A reliable synthetic emulsifier that helps mix oil and water in cleansers and creams, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review