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

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 Diacrylate/Adipate

PPG-3 GLYCERYL ETHER DIACRYLATE/ADIPATE

3.5

A synthetic film-former that helps nail polish and long-wear makeup stay put, but it offers no skincare benefit and may feel stiff on flexible surfaces.

Irritation

low

Source

synthetic

beautycosmeticsnail care
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
Read ingredient review

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

Film Former

PPG-3 Trimethylolpropane Triacrylate

PPG-3 TRIMETHYLOLPROPANE TRIACRYLATE

2.5

A synthetic film former found mainly in nail products; can be a skin sensitizer and is not recommended for everyday skincare.

Irritation

moderate

Source

synthetic

beautynail carefilm former
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

Surfactant

PPG-30 Capryleth-4 Phosphate

PPG-30 Capryleth-4 Phosphate

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

Emollient

PPG-30 Cetyl Ether

PPG-30 Cetyl 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

Surfactant

PPG-30 Ethylhexeth-4 Phosphate

PPG-30 Ethylhexeth-4 Phosphate

3.8

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

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PPG-30 Isocetyl Ether

PPG-30 Isocetyl Ether

4.0

A gentle, synthetic emollient that makes products feel silky without clogging pores or causing irritation.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emollient

PPG-30 Oleyl Ether

PPG-30 Oleyl Ether

4.0

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

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PPG-30 Steareth-4

PPG-30 Steareth-4

3.8

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Antioxidant

PPG-30 Tocophereth-70

PPG-30 Tocophereth-70

4.0

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

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Emulsifier

PPG-30-Buteth-30

PPG-30-Buteth-30

3.8

A reliable synthetic emulsifier that helps water and oil mix, but offers no active skin benefits.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PPG-33 Buteth-45

PPG-33-BUTETH-45

3.8

A gentle synthetic surfactant that helps cleanse and emulsify oils without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Humectant

PPG-33 Sorbitol

PPG-33 Sorbitol

4.0

A gentle, water-attracting ingredient that helps keep skin hydrated without clogging pores or causing irritation.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
Read ingredient review

Surfactant

PPG-34 Phosphate

PPG-34 Phosphate

3.5

PPG-34 Phosphate is a mild synthetic emulsifier that helps cleansers and makeup removers work effectively without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PPG-34 Steareth-3

PPG-34 Steareth-3

3.5

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PPG-35 Butyl Ether Phosphate

PPG-35 Butyl Ether Phosphate

3.5

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PPG-36 Oleate

PPG-36 OLEATE

3.5

PPG-36 Oleate is a synthetic emollient that helps products glide on smoothly, but it may be moderately comedogenic for acne-prone skin.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emulsifier

PPG-36-Buteth-36

PPG-36-BUTETH-36

4.0

A safe, effective emulsifier that helps mix water and oil in your products, but may be drying for very sensitive or dry skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PPG-37 Oleyl Ether

PPG-37 Oleyl 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

Emulsifier

PPG-38 Steareth-6

PPG-38 Steareth-6

3.8

A safe, effective emulsifier that helps keep your products smooth and stable, but it's purely synthetic and offers no skin benefits beyond formulation.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PPG-38-Buteth-37

PPG-38-Buteth-37

3.8

A gentle synthetic surfactant that helps blend oil and water in cleansers, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PPG-4 C12-14 Sec-Pareth-5

PPG-4 C12-14 Sec-Pareth-5

3.5

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PPG-4 C13-15 Pareth-15

PPG-4 C13-15 PARETH-15

3.5

A workhorse synthetic emulsifier that helps products rinse clean, but can be drying for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emollient

PPG-4 Caprylyl Ether

PPG-4 CAPRYLYL ETHER

4.0

A gentle synthetic emollient that helps skincare products feel silky and spread easily without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Humectant

PPG-4 Diglyceryl Ether

PPG-4 Diglyceryl Ether

4.0

A gentle, synthetic humectant that pulls water into the skin and improves the feel of your products without common irritation.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Emollient

PPG-4 Jojoba Acid

PPG-4 Jojoba Acid

4.0

A gentle, semi-synthetic emollient derived from jojoba oil that softens skin without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emollient

PPG-4 Jojoba Alcohol

PPG-4 JOJOBA ALCOHOL

4.0

A gentle, non-greasy emollient that helps soften skin and improve product texture without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Surfactant

PPG-4 Laureth-15

PPG-4 LAURETH-15

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

Emulsifier

PPG-4 Laureth-2

PPG-4 LAURETH-2

3.8

PPG-4 Laureth-2 is a synthetic emulsifier that helps mix oil and water in products, but it can be mildly irritating for sensitive skin at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PPG-4 Laureth-5

PPG-4 LAURETH-5

3.8

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

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PPG-4 Laureth-7

PPG-4 LAURETH-7

3.8

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

Emollient

PPG-4 Lauryl Ether

PPG-4 LAURYL ETHER

3.8

A gentle synthetic emollient that helps products spread smoothly and leaves skin feeling soft without heavy greasiness.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Solvent

PPG-4 Methyl Ether

PPG-4 METHYL ETHER

3.8

A synthetic solvent that helps products spread and dissolve oils, generally safe but not a star ingredient.

Irritation

low

Source

synthetic

beautyskincaresolvent
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Emollient

PPG-4 Myristyl Ether

PPG-4 Myristyl Ether

4.0

A gentle synthetic emollient that softens skin and improves product feel without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

PPG-4 Oleth-10 Dimethicone

PPG-4 OLETH-10 DIMETHICONE

4.0

A gentle silicone emulsifier that improves product texture and spreadability without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

PPG-4 Trideceth-6

PPG-4 TRIDECETH-6

4.0

A gentle synthetic emulsifier that helps rinse away oil and dirt without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

PPG-4-Buteth-4

PPG-4-Buteth-4

3.8

A mild synthetic ingredient that helps cleansers and other products mix oil and water, generally considered safe and low-irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

PPG-4-Ceteareth-12

PPG-4-CETEARETH-12

3.5

A reliable synthetic emulsifier that helps products feel smooth and spread evenly, but it's not a star ingredient for skin health.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PPG-4-Ceteth-1

PPG-4-CETETH-1

3.5

A reliable synthetic emulsifier that helps create stable, creamy formulas, but offers no direct skin benefit beyond texture.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

PPG-4-Ceteth-10

PPG-4-CETETH-10

3.8

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

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review