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

Humectant

PPG-20 Diglyceryl Ether

PPG-20 Diglyceryl Ether

4.0

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

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Emulsifier

PPG-20 Laureth-12

PPG-20 Laureth-12

3.8

A synthetic emulsifier that helps mix oil and water, but may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PPG-20 Methyl Glucose Ether Acetate

PPG-20 METHYL GLUCOSE ETHER ACETATE

4.0

A gentle, non-greasy emollient derived from glucose that helps skincare products spread smoothly and leaves skin feeling soft without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emollient

PPG-20 Oleyl Ether

PPG-20 Oleyl Ether

3.8

A gentle synthetic emollient that helps products glide on smoothly without heavy greasiness, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Skin conditioning agent

PPG-20 Tocophereth-5

PPG-20 Tocophereth-5

4.0

A gentle, multi-tasking ingredient that moisturizes and provides antioxidant benefits without common irritation.

Irritation

low

Source

semi-synthetic

beautyskincareconditioning agent
Read ingredient review

Antioxidant

PPG-20 Tocophereth-50

PPG-20 Tocophereth-50

4.0

A gentle, water-soluble vitamin E derivative that helps protect skin from environmental damage without the greasiness of pure vitamin E.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Humectant

PPG-20-Glycereth-30

PPG-20-GLYCERETH-30

4.2

A gentle, water-loving ingredient that pulls moisture into the skin and leaves it feeling smooth without greasiness.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Emollient

PPG-20-PEG-20 Hydrogenated Lanolin

PPG-20-PEG-20 Hydrogenated Lanolin

3.8

A versatile, semi-synthetic emollient that softens skin and helps blend oil and water, but may clog pores for some.

Irritation

low

Source

semi-synthetic

beautyskincareemollientemulsifier
Read ingredient review

Surfactant

PPG-21 Butyl Ether Phosphate

PPG-21 BUTYL ETHER PHOSPHATE

3.8

PPG-21 Butyl Ether Phosphate helps mix oil and water in cleansers, but may be drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PPG-23 Oleyl Ether

PPG-23 Oleyl Ether

3.8

A synthetic emollient that helps products glide on smoothly without feeling greasy, generally safe for most skin types.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PPG-23 Steareth-34

PPG-23 Steareth-34

3.5

A reliable synthetic emulsifier that stabilizes formulas but offers no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Humectant

PPG-24 Diglyceryl Ether

PPG-24 Diglyceryl Ether

4.0

A gentle, synthetic humectant that draws moisture to the skin without common irritation or stickiness.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Humectant

PPG-24 Glycereth-24

PPG-24-GLYCERETH-24

4.0

A gentle, synthetic humectant that helps your skin hold onto moisture without feeling sticky or greasy.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Emulsifier

PPG-24-Buteth-27

PPG-24-BUTETH-27

3.5

A reliable synthetic emulsifier that helps keep your lotions and creams smooth and stable, but it's not a star active ingredient.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PPG-25 Butyl Ether Phosphate

PPG-25 Butyl Ether Phosphate

3.8

An effective cleansing agent that helps dissolve makeup and excess oil, but may be drying for sensitive or dry skin types.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
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

Humectant

PPG-25 Glycereth-22

PPG-25 Glycereth-22

4.0

A gentle, water-binding ingredient that helps keep skin hydrated and improves product feel without common irritation.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Surfactant

PPG-25 Laureth-25

PPG-25-Laureth-25

3.5

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Humectant

PPG-25 Methyl Glucose Ether

PPG-25 Methyl Glucose Ether

4.0

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

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Humectant

PPG-25 Sorbitol

PPG-25 SORBITOL

4.0

A gentle, synthetic humectant that draws moisture to the skin without common irritation.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Emollient

PPG-26 Oleate

PPG-26 Oleate

3.8

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

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PPG-26-Buteth-26

PPG-26-Buteth-26

4.0

A gentle, water-soluble emulsifier that helps mix oils and fragrances into clear, lightweight formulas without leaving a greasy feel.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Film Former

PPG-26/Dimer Dilinoleate Copolymer

PPG-26/Dimer Dilinoleate Copolymer

4.0

A safe, synthetic polymer that creates a flexible film on skin, improving water resistance and texture without common irritation.

Irritation

low

Source

synthetic

beautyskincarefilm former
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Film Former

PPG-26/HDI Copolymer

PPG-26/HDI Copolymer

3.8

A synthetic polymer that helps products stay put, resist water, and feel lightweight, but offers no active skincare benefit.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

PPG-26/TDI Copolymer

PPG-26/TDI Copolymer

3.8

A synthetic polymer that helps makeup and sunscreen stay put longer, but it's not a skincare active and may feel heavy on oily skin.

Irritation

low

Source

synthetic

beautyskincarefilm-former
Read ingredient review

Emollient

PPG-27 Dimethicone

PPG-27 Dimethicone

4.0

A gentle silicone that helps products spread smoothly and leaves skin feeling soft without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Humectant

PPG-27 Glyceryl Ether

PPG-27 Glyceryl Ether

4.0

A gentle synthetic humectant that hydrates the skin and improves the feel of cosmetic formulas without common irritation.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Emollient

PPG-28 Cetyl Ether

PPG-28 Cetyl Ether

4.0

A gentle, synthetic emollient that helps products glide on smoothly without clogging pores or causing irritation.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Surfactant

PPG-28-Buteth-35

PPG-28-Buteth-35

3.8

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PPG-3 Benzyl Ether Myristate

PPG-3 Benzyl Ether Myristate

4.0

A lightweight synthetic emollient that helps products glide on smoothly without greasiness, suitable for most skin types.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emollient

PPG-3 Butyl Ether

PPG-3 Butyl Ether

4.0

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

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Surfactant

PPG-3 C12-14 Sec-Pareth-7

PPG-3 C12-14 Sec-Pareth-7

3.5

A synthetic cleansing agent that effectively removes dirt and oil but may be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleansing
Read ingredient review

Emollient

PPG-3 Caprylyl Ether

PPG-3 Caprylyl Ether

4.0

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

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emollient

PPG-3 Dipivalate

PPG-3 Dipivalate

4.0

A lightweight synthetic emollient that softens skin and improves product texture with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Humectant

PPG-3 Glyceryl Ether

PPG-3 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

Film Former

PPG-3 Glyceryl Ether Triacrylate

PPG-3 Glyceryl Ether Triacrylate

3.0

A synthetic film-former that helps nail products last longer, but may cause irritation for sensitive skin or nail beds.

Irritation

moderate

Source

synthetic

beautyskincarenail care
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Conditioning Agent

PPG-3 Hydroxyethyl Soyamide

PPG-3 Hydroxyethyl Soyamide

4.0

A gentle, soy-derived conditioning ingredient that helps soften skin and hair without clogging pores or causing irritation.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Surfactant

PPG-3 Isodeceth-1

PPG-3-ISODECETH-1

3.8

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PPG-3 Isostearth-9

PPG-3-ISOSTEARETH-9

3.8

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PPG-3 Laureth-10

PPG-3-Laureth-10

3.8

A synthetic emulsifier that helps cleansers foam and rinse clean, but may be drying for sensitive or dry skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PPG-3 Laureth-12

PPG-3-Laureth-12

3.8

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PPG-3 Laureth-8

PPG-3-Laureth-8

3.8

A synthetic emulsifier that helps products rinse cleanly, but may be drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PPG-3 Laureth-9

PPG-3-Laureth-9

3.5

PPG-3-Laureth-9 is a synthetic surfactant that helps cleansers foam and remove oil, but it may be slightly drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PPG-3 Myreth-11

PPG-3-MYRETH-11

3.8

A synthetic emulsifier that helps cleansers foam and rinse cleanly, but may be drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PPG-3 Myreth-3

PPG-3-MYRETH-3

3.5

A synthetic emulsifier that helps mix oil and water, generally considered safe at low concentrations.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PPG-3 Myristyl Ether

PPG-3 Myristyl Ether

4.0

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

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Antistatic Agent

PPG-3 Tallow Aminopropylamine

PPG-3 Tallow Aminopropylamine

3.5

A conditioning ingredient that can improve hair manageability but may be irritating or comedogenic for some.

Irritation

moderate

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Surfactant

PPG-3-Buteth-5

PPG-3-BUTETH-5

3.8

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PPG-3-PEG-6 Oleyl Ether

PPG-3-PEG-6 Oleyl Ether

3.8

A gentle synthetic emulsifier that helps mix oil and water, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review