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 2,268
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

Emollient

Palm Fruit Oil

Elaeis Oleifera Fruit Oil

3.8

A rich, plant-based emollient that softens skin but may clog pores for some people, and its sourcing raises environmental concerns.

Irritation

low

Source

natural

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Emollient

Palm Glyceride

Palm Glyceride

4.0

A gentle, plant-derived emollient that helps replenish the skin's natural moisture barrier without clogging pores.

Irritation

low

Source

natural

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Emollient

Palm Kernel Alcohol

PALM KERNEL ALCOHOL

4.0

A gentle fatty alcohol that softens skin and improves product texture without clogging pores.

Irritation

low

Source

natural

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Emollient

Palm Kernel Oil

Elaeis Oleifera Kernel Oil

3.8

Palm kernel oil is a rich emollient that softens skin but may clog pores for some, and its sourcing raises environmental concerns.

Irritation

low

Source

natural

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Emollient

Palm Kernel Wax

PALM KERNEL WAX

4.0

A gentle, plant-based wax that helps give products a smooth, creamy texture without clogging pores.

Irritation

low

Source

natural

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Emollient

Palm Oil Oleyl Esters

Palm Oil Oleyl Esters

3.8

A gentle emollient that helps skin feel soft and smooth, but its sustainability depends on palm oil sourcing.

Irritation

low

Source

semi-synthetic

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Emollient

Palm-Derived Ingredients

Elaeis Guineensis Oil / Hydrogenated Palm Glycerides / etc.

3.5

Palm-derived ingredients are common, effective, and affordable, but raise environmental and ethical concerns due to deforestation.

Irritation

low

Source

natural

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Skin conditioning

Palmitamide

Palmitamide

3.8

Palmitamide is a gentle, fatty-acid-based ingredient that helps reinforce the skin barrier and improve moisture retention.

Irritation

low

Source

semi-synthetic

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Emollient

Palmitic Acid

Palmitic Acid

4.0

Palmitic acid is a gentle fatty acid that softens skin and helps products feel creamy, but it may clog pores for some people.

Irritation

low

Source

natural

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Emollient

Palmitoleic Acid

HEXADECENOIC ACID

4.0

A gentle omega-7 fatty acid that helps support the skin barrier and improve moisture retention without clogging pores.

Irritation

low

Source

natural

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Emollient

Pangium Edule Kernel Oil

Pangium Edule Kernel Oil

3.8

A gentle, plant-based oil that hydrates and softens skin, but scientific research on its specific benefits is still limited.

Irritation

low

Source

natural

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Emollient

Passion Fruit & Palm Amino Ester

Passiflora Edulis Seed Oil/Palm Oil Aminopropanediol Esters

4.0

A gentle, plant-derived emollient that softens skin and helps other ingredients spread evenly, with a low risk of irritation or clogged pores.

Irritation

low

Source

semi-synthetic

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Emollient

Passion Fruit Seed Oil

Passiflora Edulis Seed Oil

4.3

A gentle, non-greasy oil that hydrates and protects skin with essential fatty acids and antioxidants.

Irritation

low

Source

natural

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Emollient

Passion Fruit Seed Oil PEG-8 Esters

PASSIFLORA EDULIS SEED OILS PEG-8 ESTERS

4.0

A gentle, water-friendly emollient that brings the nourishing qualities of passion fruit seed oil into water-based formulas without greasiness.

Irritation

low

Source

semi-synthetic

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Emollient

Passionflower Seed Oil

PASSIFLORA INCARNATA SEED OIL

4.3

A nourishing, non-greasy oil that helps soften skin and support a healthy moisture barrier without clogging pores.

Irritation

low

Source

natural

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Emollient

Patauá Oil

OENOCARPUS BATAUA SEED OIL

4.3

Patauá oil is a lightweight, non-greasy Amazonian oil that deeply moisturizes and softens skin without clogging pores.

Irritation

low

Source

natural

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Emollient

PCA Glyceryl Oleate

PCA Glyceryl Oleate

4.0

A gentle, non-greasy emollient that helps soften and condition skin while supporting the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

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Emollient

Pea Palmitate

Pea Palmitate

4.0

Pea Palmitate is a gentle, plant-based emollient that helps moisturize and soften skin without clogging pores.

Irritation

low

Source

natural

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Emollient

Peach Kernel Extract

PRUNUS PERSICA KERNEL EXTRACT

4.0

Peach Kernel Extract is a gentle, nourishing emollient that helps soften and smooth skin without clogging pores.

Irritation

low

Source

natural

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Emollient

Peanut Glycerides

Peanut Glycerides

3.5

Peanut Glycerides are gentle emollients that soften skin, but may be comedogenic for acne-prone individuals and are unsuitable for those with peanut allergies.

Irritation

low

Source

natural

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Emollient

Peanut Oil PEG-6 Esters

PEANUT OIL PEG-6 ESTERS

3.5

A versatile emollient and emulsifier that helps products feel smooth, but may be comedogenic for acne-prone skin and is unsuitable for those with peanut allergy.

Irritation

low

Source

semi-synthetic

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Emollient

Pecan Seed Oil

Carya Illinoinensis Seed Oil

4.0

A gentle, non-greasy oil rich in fatty acids and vitamin E that helps soften and protect the skin barrier.

Irritation

low

Source

natural

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Emollient

PEG Fluorinated Ester

Polyperfluoroethoxymethoxy Difluoroethyl PEG Diisostearate

3.5

A synthetic fluorinated ingredient that helps products feel silky and resist water, but its environmental persistence raises concerns.

Irritation

low

Source

synthetic

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Emollient

PEG-10 Hydrogenated Lanolin

PEG-10 Hydrogenated Lanolin

3.8

A gentle, lanolin-based emollient that helps soften skin and stabilize formulas, but may clog pores for some.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-10 Lanolin

PEG-10 Lanolin

3.8

A gentle, water-soluble lanolin derivative that softens skin and helps blend oil and water in formulas, but may clog pores for some.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-100 Lanolin

PEG-100 Lanolin

3.5

PEG-100 Lanolin is a water-friendly version of lanolin that softens skin and helps blend oil and water, but it may clog pores for some and raises concerns about potential impurities from the PEG process.

Irritation

low

Source

semi-synthetic

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Skin Conditioning

PEG-100 Polycaprolactone Palmitate

METHOXY PEG-100/POLYEPSILON CAPROLACTONE PALMITATE

3.8

A gentle film-forming polymer that helps ingredients spread smoothly and leaves skin feeling soft without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-12 Carnauba

PEG-12 Carnauba

3.8

A gentle, water-friendly wax that helps products feel smooth and spread easily without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-12 Dimethicone

PEG-12 Dimethicone

4.0

A gentle silicone that smooths skin and hair without heavy greasiness, but may not suit those avoiding silicones entirely.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-13 Ethylhexanoate

PEG-13 Ethylhexanoate

3.5

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

Irritation

low

Source

synthetic

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Emollient

PEG-15 Hydrogenated Lanolin

PEG-15 Hydrogenated Lanolin

3.5

A gentle, modified lanolin that moisturizes and helps blend water and oil, but may be too heavy for acne-prone skin.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-2 Benzyl Ether

PEG-2 Benzyl Ether

3.5

A gentle synthetic ingredient that helps products feel smooth and spread easily, but offers no active skincare benefit on its own.

Irritation

low

Source

synthetic

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Emollient

PEG-2 Diethylhexanoate

PEG-2 DIETHYLHEXANOATE

3.8

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

Irritation

low

Source

synthetic

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Emollient

PEG-2 Diisononanoate

PEG-2 Diisononanoate

3.8

A gentle synthetic emollient that helps products feel silky and spread easily, with low irritation potential.

Irritation

low

Source

synthetic

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Emollient

PEG-2 Dilaurate

PEG-2 Dilaurate

3.8

A synthetic emollient that helps products feel smooth and spread easily, but may be moderately pore-clogging for some skin types.

Irritation

low

Source

synthetic

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Skin Conditioner

PEG-2 Milk Solids

PEG-2 Milk Solids

3.5

A gentle, semi-synthetic ingredient that combines milk solids with PEG to improve skin feel and product texture, but may not suit those avoiding PEGs or animal-derived ingredients.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-2 Phenyl Ether

PEG-2 Phenyl Ether

3.8

A gentle synthetic ingredient that helps products spread smoothly and feel less greasy, but offers no active skin benefits.

Irritation

low

Source

synthetic

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Emollient

PEG-20 Lanolin

PEG-20 Lanolin

3.5

PEG-20 Lanolin is a water-friendly version of lanolin that softens skin and helps blend oils and water, but it may clog pores for some and raises concerns about processing impurities.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-20 Phytosterol

PEG-20 PHYTOSTEROL

4.0

A gentle, plant-based emollient that improves skin hydration and helps blend water and oil in formulas.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-25 Phytostanol

PEG-25 Phytostanol

4.0

A gentle, plant-based emollient that hydrates and softens skin with a low risk of irritation or clogged pores.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-27 Lanolin

PEG-27 Lanolin

3.8

PEG-27 Lanolin is a modified lanolin that adds water solubility, making it a versatile emollient and mild cleanser, but it may be moderately comedogenic for acne-prone skin.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-3 Dicaprylate/Caprate

PEG-3 DICAPRYLATE/CAPRATE

3.5

A synthetic emollient that helps products feel silky and spread easily, with low irritation risk but limited research on long-term effects.

Irritation

low

Source

synthetic

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Emollient

PEG-3 Dipalmitate

PEG-3 DIPALMITATE

3.8

A gentle synthetic emollient that helps soften skin and stabilize formulas, but offers no active benefits beyond basic moisturizing.

Irritation

low

Source

synthetic

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Emollient

PEG-3 Lanolate

PEG-3 Lanolate

3.5

A gentle, water-friendly lanolin derivative that softens skin and helps blend oils and water, but may clog pores for some.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-30 Lanolin

PEG-30 Lanolin

3.5

PEG-30 Lanolin is a water-friendly version of lanolin that softens skin and helps blend oil and water in formulas, but it may clog pores for some people.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-32 Methyl Ether Dimethicone

PEG-32 METHYL ETHER DIMETHICONE

4.0

A gentle silicone that helps products glide on smoothly without clogging pores, but may not suit those avoiding silicones entirely.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-35 Lanolin

PEG-35 Lanolin

3.8

A gentle, water-friendly lanolin derivative that moisturizes and helps blend oil and water in formulas, but may not suit those with wool allergies.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-4 Caprylic/Capric Triglyceride

CAPRYLIC/CAPRIC TRIGLYCERIDE PEG-4 ESTERS

3.8

A gentle, semi-synthetic emollient that helps products spread smoothly and feel silky, but may not suit those avoiding PEG compounds.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-4 Dicocoate

PEG-4 Dicocoate

3.8

A gentle synthetic emollient that helps products spread smoothly and feel less greasy, but may not suit those avoiding PEG compounds.

Irritation

low

Source

synthetic

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Emollient

PEG-4 Diheptanoate

PEG-4 Diheptanoate

3.8

A lightweight synthetic emollient that helps products glide on smoothly without a greasy feel, but it offers no active skincare benefits.

Irritation

low

Source

synthetic

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Emollient

PEG-4 Ethylhexanoate

PEG-4 Ethylhexanoate

3.8

A lightweight synthetic emollient that softens skin without a greasy feel, generally well-tolerated but not a standout active ingredient.

Irritation

low

Source

synthetic

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Emollient

PEG-4 Lanolate

PEG-4 Lanolate

3.8

PEG-4 Lanolate is a gentle, lanolin-derived emollient that softens skin and helps other ingredients absorb, but it may clog pores for acne-prone individuals.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-4 Proline Linoleate

PEG-4 Proline Linoleate

4.0

A gentle, semi-synthetic moisturizer that helps reinforce the skin barrier and improve hydration without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

PEG-42 Mushroom Glycerides

PEG-42 Mushroom Glycerides

3.5

A gentle, semi-synthetic emollient that helps soften skin and stabilize formulas, but research on its unique mushroom-derived benefits is still limited.

Irritation

low

Source

semi-synthetic

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