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 20,769
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 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
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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

Film Former

PEG-6 Trimethylolpropane Triacrylate

PEG-6 Trimethylolpropane Triacrylate

2.5

A synthetic film former used in nail products; may cause skin irritation in sensitive individuals and is not typically found in leave-on facial skincare.

Irritation

moderate

Source

synthetic

beautynail carefilm former
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

Emulsifier

PEG-60 Tsubakiate Glycerides

PEG-60 Tsubakiate Glycerides

4.0

A gentle, camellia-derived emulsifier that helps blend oil and water while leaving skin feeling soft and conditioned.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-65 Butylene Glycol Isostearate

PEG-65 Butylene Glycol Isostearate

3.5

A synthetic emulsifier that helps mix water and oil in products, generally well-tolerated but with limited research on long-term skin effects.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PEG-65 Hydrogenated Castor Oil

PEG-65 HYDROGENATED CASTOR OIL

3.8

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

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Thickener

PEG-65M

PEG-65M

3.8

PEG-65M is a safe, synthetic thickener that improves product texture and feel without common irritation concerns.

Irritation

low

Source

synthetic

beautyskincarethickener
Read ingredient review

Emulsifier

PEG-66 Trihydroxystearin

PEG-66 Trihydroxystearin

4.0

A reliable synthetic emulsifier that helps keep your creams and lotions smooth and stable, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Conditioning agent

PEG-7 Amodimethicone

PEG-7 Amodimethicone

4.0

A gentle silicone that smooths hair and reduces frizz without heavy buildup, but may not suit very fine or low-porosity hair.

Irritation

low

Source

synthetic

beautyhaircareconditioning agent
Read ingredient review

Surfactant

PEG-7 Beta-Naphthol

PEG-7 Beta-Naphthol

3.0

A synthetic surfactant that helps cleanse but may cause irritation for sensitive skin; not a common or well-studied ingredient in modern skincare.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PEG-7 Caprylic/Capric Glycerides

PEG-7 Caprylic/Capric Glycerides

4.0

A gentle, water-friendly emollient that helps hydrate and soften skin without clogging pores, commonly used in rinse-off and leave-on products.

Irritation

low

Source

semi-synthetic

beautyskincareemollientsurfactant
Read ingredient review

Surfactant

PEG-7 Cocamide

PEG-7 Cocamide

3.8

A gentle, coconut-derived cleansing agent that helps products foam and rinse cleanly, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PEG-7 Cocoglycerides

PEG-7 Cocoglycerides

4.0

A gentle, water-friendly emollient that helps cleanse without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emollient

PEG-7 Cupuaçu Butter Glycerides

PEG-7 Theobroma Grandiflorum Seed Butter Glyceryl Esters

4.0

A gentle, PEG-modified butter that cleanses without stripping and leaves skin soft—great for sensitive types.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emollient

PEG-7 Dimethicone

PEG-7 Dimethicone

4.0

A gentle, water-soluble silicone that makes products feel silky without heavy buildup.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Conditioning Agent

PEG-7 Dimethicone Panthenyl Phosphate

POTASSIUM DIMETHICONE PEG-7 PANTHENYL PHOSPHATE

4.0

A gentle silicone derivative that conditions hair and skin while adding a touch of moisture from panthenol (provitamin B5).

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Emulsifier

PEG-7 Glyceryl Cocoate

PEG-7 Glyceryl Cocoate

4.0

A gentle, coconut-derived emulsifier that helps blend oil and water in cleansers without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PEG-7 Glyceryl Laurate

PEG-7 Glyceryl Laurate

4.0

A gentle emulsifier that helps mix oil and water in cleansers and creams, with a low risk of irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PEG-7 Glyceryl Soyate

PEG-7 Glyceryl Soyate

4.0

A gentle, non-stripping surfactant derived from soybean oil that effectively cleanses while respecting the skin barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agent
Read ingredient review

Emulsifier

PEG-7 Hydrogenated Castor Oil

PEG-7 HYDROGENATED CASTOR OIL

4.0

A reliable, low-irritation emulsifier that helps rinse away oil-based impurities without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PEG-7 Lanolate

PEG-7 Lanolate

3.8

A gentle, water-soluble lanolin derivative that softens skin and helps cleanse without stripping, but may clog pores for some.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emollient

PEG-7 Methyl Ether

PEG-7 METHYL ETHER

4.0

A gentle, water-loving synthetic ingredient that softens skin and helps other ingredients spread evenly.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Emollient

PEG-7 Methyl Ether Dimethicone

PEG-7 METHYL ETHER DIMETHICONE

4.0

A gentle, water-soluble silicone that helps products glide on smoothly without a heavy or greasy feel.

Irritation

low

Source

semi-synthetic

beautyskincareconditioning agent
Read ingredient review

Emulsifier

PEG-7 Oleamide

PEG-7 Oleamide

3.8

PEG-7 Oleamide is a gentle synthetic emulsifier that helps blend oil and water in cleansers and lotions, but its PEG component raises mild environmental concerns.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PEG-7 Oleate

PEG-7 Oleate

3.5

PEG-7 Oleate 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-7 Olivate

PEG-7 Olivate

4.0

A gentle, olive-derived emulsifier that helps rinse away oil and makeup without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review