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

PPG-5-Buteth-7

PPG-5-Buteth-7

3.8

A synthetic helper ingredient that blends oil and water, generally safe and non-irritating for most skin types.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PPG-5-Ceteth-10 Phosphate

PPG-5-CETETH-10 PHOSPHATE

3.5

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PPG-5-Ceteth-20

PPG-5-CETETH-20

3.8

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PPG-50 Cetyl Ether

PPG-50 Cetyl Ether

4.0

A reliable synthetic emollient that helps products spread smoothly and feel silky without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Humectant

PPG-50 Glyceryl Ether

PPG-50 Glyceryl Ether

4.0

A gentle, synthetic humectant that draws moisture into the skin without the sticky feel of glycerin.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Emulsifier

PPG-50 Oleyl Ether

PPG-50 Oleyl Ether

3.8

A reliable synthetic emulsifier that helps oil and water mix in your skincare products, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

PPG-51

PPG-51

4.0

PPG-51 is a safe, synthetic ingredient that makes products feel silky and helps other ingredients spread evenly without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Film Former

PPG-51/SMDI Copolymer

PPG-51/SMDI Copolymer

3.8

A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefit.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Humectant

PPG-55 Glyceryl Ether

PPG-55 Glyceryl Ether

4.0

A gentle, synthetic humectant that draws moisture to the skin and helps other ingredients absorb better.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Surfactant

PPG-6 C12-15 Pareth-12

PPG-6 C12-15 Pareth-12

3.8

A gentle synthetic emulsifier that helps cleansers rinse cleanly without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PPG-6 C12-18 Pareth-11

PPG-6 C12-18 Pareth-11

3.5

A mild synthetic emulsifier that helps cleansers rinse cleanly without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PPG-6 C9-11 Pareth-5

PPG-6 C9-11 PARETH-5

3.5

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PPG-6 Caprylyl Ether

PPG-6 Caprylyl Ether

4.0

A lightweight synthetic emollient that improves product texture and spreadability without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emollient

PPG-6 Castorate

PPG-6 Castorate

4.0

A gentle, castor-oil-derived emollient that helps products glide on smoothly without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Surfactant

PPG-6 Deceth-4

PPG-6-DECETH-4

3.8

A mild synthetic surfactant that helps cleansers foam and rinse cleanly without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PPG-6 Decyltetradeceth-12

PPG-6-DECYLTETRADECETH-12

4.0

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Humectant

PPG-6 Glyceryl Ether

PPG-6 Glyceryl Ether

4.0

A gentle, synthetic humectant that draws moisture to the skin without the stickiness of glycerin.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Surfactant

PPG-6 Laureth-3

PPG-6-Laureth-3

3.8

An effective emulsifier and mild surfactant, but may cause irritation in sensitive skin at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PPG-6 Sorbeth-245

PPG-6-SORBETH-245

3.8

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PPG-6 Sorbeth-500

PPG-6-SORBETH-500

4.0

A gentle, synthetic ingredient that hydrates and smooths skin without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Surfactant

PPG-6 Trideceth-8

PPG-6 Trideceth-8

3.5

PPG-6 Trideceth-8 is a synthetic emulsifier that helps mix oil and water in cleansers, but it may be slightly drying for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PPG-6-Deceth-9

PPG-6-Deceth-9

3.5

A synthetic emulsifier that helps mix oil and water, but may cause irritation in sensitive skin at high concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PPG-6-Decyltetradeceth-30

PPG-6-DECYLTETRADECETH-30

4.0

A reliable synthetic emulsifier that helps keep your skincare products stable and smooth without common irritation concerns.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Humectant

PPG-66-Glycereth-12

PPG-66-Glycereth-12

4.0

A gentle, synthetic humectant that helps hydrate skin and improve product feel without common irritation risks.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Humectant

PPG-67 Glyceryl Ether

PPG-67 Glyceryl Ether

4.0

A gentle, synthetic humectant that draws moisture to the skin without the sticky feel of glycerin.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Humectant

PPG-69

PPG-69

3.8

PPG-69 is a gentle synthetic humectant that helps keep skin hydrated without clogging pores, but it offers no unique benefits over more common alternatives.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Surfactant

PPG-69 Phosphate

PPG-69 Phosphate

4.0

A gentle synthetic emulsifier that helps cleansers rinse cleanly without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Film Former

PPG-7 Diacrylate

PPG-7 DIACRYLATE

3.5

PPG-7 Diacrylate is a synthetic film-former that helps products spread evenly and stay put, but it may cause irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarefilm former
Read ingredient review

Emollient

PPG-7 Lauryl Ether

PPG-7 Lauryl Ether

4.0

A gentle synthetic emollient that softens and smooths skin without feeling greasy, suitable for most skin types.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Surfactant

PPG-7-Buteth-10

PPG-7-Buteth-10

3.8

A mild synthetic emulsifier that helps mix oil and water in cleansers and shampoos, generally well-tolerated by most skin types.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PPG-7-Buteth-4

PPG-7-Buteth-4

3.8

A gentle synthetic emulsifier that helps oil and water mix, making creams and cleansers stable and effective.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PPG-7/PEG-30 Phytosterol

PPG-7/PEG-30 Phytosterol

4.0

A gentle, plant-derived emulsifier that helps blend oil and water in formulas while leaving a smooth, non-greasy feel on skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Film Former

PPG-70 Bis-(2-Aminopropyl) Ether

PPG-70 BIS-(2-AMINOPROPYL) ETHER

3.8

A gentle synthetic polymer that helps hair feel smooth and products spread evenly, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Humectant

PPG-70 Glyceryl Ether

PPG-70 Glyceryl Ether

4.0

A gentle, synthetic humectant that draws moisture into the skin without the stickiness of glycerin.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Emulsifier

PPG-70 Polyglyceryl-10 Ether

PPG-70 Polyglyceryl-10 Ether

4.0

A gentle, plant-derived emulsifier that helps blend water and oil in skincare formulas while leaving skin feeling soft.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Antioxidant

PPG-70 Tocophereth-100

PPG-70 Tocophereth-100

4.0

A gentle, water-soluble form of vitamin E that helps protect skin from environmental damage without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Humectant

PPG-75-PEG-300 Hexylene Glycol

PPG-75-PEG-300 Hexylene Glycol

3.8

A synthetic humectant that helps keep skin hydrated and improves product texture, but offers no unique benefits over more common alternatives.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Emulsifier

PPG-8 Ceteth-20

PPG-8-CETETH-20

3.8

A reliable synthetic emulsifier that helps keep your products stable and creamy, but offers no direct skin benefit on its own.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Humectant

PPG-8 Glyceryl Ether

PPG-8 Glyceryl Ether

4.0

A gentle, synthetic humectant that attracts moisture to the skin without the sticky feel of glycerin.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Emollient

PPG-8 Polyglyceryl-2 Ether

PPG-8 Polyglyceryl-2 Ether

4.0

A mild, water-soluble emollient that softens skin and improves product feel without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emollient

PPG-8 Sorbitol Castor Oil

PPG-8 SORBITOL CASTOR OIL

4.0

A gentle, semi-synthetic ingredient that helps products feel smooth and spread easily without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PPG-8-Ceteth-1

PPG-8-CETETH-1

3.8

A safe, effective emulsifier that helps your skincare products feel smooth and stay stable, but it offers no direct skin benefit on its own.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PPG-8-Ceteth-10

PPG-8-CETETH-10

3.8

A reliable synthetic emulsifier that helps keep your product smooth and stable, but offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PPG-8-Ceteth-2

PPG-8-CETETH-2

4.0

A workhorse emulsifier that helps oil and water mix in your skincare, generally well-tolerated but purely synthetic.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PPG-8-Ceteth-5

PPG-8-Ceteth-5

3.8

A reliable synthetic emulsifier that helps mix oil and water in your products, but it's not a star ingredient with direct skin benefits.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PPG-8-Deceth-6

PPG-8-Deceth-6

3.8

A mild synthetic surfactant that helps products foam and rinse cleanly, generally well-tolerated but not a star active ingredient.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PPG-9 Diglyceryl Ether

PPG-9 Diglyceryl Ether

4.0

A gentle synthetic emollient that softens skin and improves product texture without common irritation or clogging concerns.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Surfactant

PPG-9 Ethylhexeth-5

PPG-9 Ethylhexeth-5

3.8

A gentle synthetic emulsifier that helps cleanse without stripping the skin, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Humectant

PPG-9 Glyceryl Ether

PPG-9 Glyceryl Ether

4.0

A gentle, synthetic humectant that attracts moisture to the skin without common irritation or clogging.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Emollient

PPG-9 Laurate

PPG-9 Laurate

3.8

A synthetic emollient that helps products feel silky and spread easily, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PPG-9 Steareth-3

PPG-9 Steareth-3

3.8

A synthetic emulsifier that helps mix water and oil in products, generally considered safe and low-irritation for most skin types.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PPG-9-Buteth-12

PPG-9-BUTETH-12

3.5

A synthetic emulsifier that helps products spread and rinse cleanly, but may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PPG-90 Butyl Ether

PPG-90 Butyl Ether

4.0

A lightweight synthetic emollient that improves product feel and spreadability without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollienttexturizer
Read ingredient review

Viscosity Controlling

PPG/PEG Polymer Blend

PPG-23-PEG-4 TRIMETHYLOLPROPANE

3.5

A synthetic thickener that helps create a smooth, stable texture in creams and lotions, but offers no active skin benefits.

Irritation

low

Source

synthetic

beautyskincarethickener
Read ingredient review

Emulsifier

PPG/PEG Trimethylolpropane

PPG-25-PEG-25 Trimethylolpropane

4.0

A gentle synthetic ingredient that helps blend water and oil in formulas while leaving skin feeling smooth.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review