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

Antistatic Agent

Hydrogenated Paltrimonium Chloride

Hydrogenated Paltrimonium Chloride

3.5

A conditioning ingredient that reduces static and softens hair, but may be too heavy for fine hair or acne-prone skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarehaircare
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Emollient

Hydrogenated Peach Kernel Oil

HYDROGENATED PEACH KERNEL OIL

4.0

A gentle, plant-derived emollient that softens and smooths skin without clogging pores, ideal for dry or sensitive skin.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Hydrogenated Pine Seed Oil

Hydrogenated Pinus Pinaster Seed Oil

4.0

A stable, non-greasy emollient derived from pine seeds that helps soften skin and improve product texture.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emollient

Hydrogenated Plum Seed Oil

HYDROGENATED PRUNUS DOMESTICA SEED OIL

4.3

A stable, non-greasy emollient derived from plum seeds that softens skin and gives products a luxurious, buttery feel.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Plum Seed Oil Esters

Prunus Domestica/Hydrogenated Prunus Domestica Seed Oil Esters

4.3

A gentle, plant-derived emollient that hydrates and smooths skin without clogging pores, ideal for sensitive and dry skin types.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Polydecene

Hydrogenated Polydecene

4.5

A silky, lightweight synthetic oil that hydrates without clogging pores — a great option for oily and sensitive skin types.

Irritation

low

Source

synthetic

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Emollient

Hydrogenated Polydodecene

Hydrogenated Polydodecene

4.0

A synthetic emollient that spreads easily, feels lightweight, and helps other ingredients absorb without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Absorbent

Hydrogenated Potato Starch

Hydrogenated Potato Starch

4.0

A gentle, plant-derived powder that helps absorb excess oil and gives products a silky, smooth feel without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincaretexturizer
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Emollient

Hydrogenated Rapeseed Glycerides

HYDROGENATED RAPESEED GLYCERIDES

4.0

A gentle, plant-based emollient that hydrates and smooths skin without clogging pores, ideal for sensitive and dry skin types.

Irritation

low

Source

natural

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Anti-Aging Agent

Hydrogenated Retinol

Hydrogenated Retinol

4.0

A gentler, stabilized form of retinol that aims to reduce wrinkles and improve skin texture with less irritation than traditional retinol.

Irritation

low

Source

semi-synthetic

beautyskincareanti-aging
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Emollient

Hydrogenated Rosehip Oil

Hydrogenated Rosa Canina Fruit Oil

4.0

A stable, non-greasy emollient derived from rosehip oil, ideal for dry or sensitive skin in balms and sticks.

Irritation

low

Source

semi-synthetic

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Soothing Agent

Hydrogenated Saussurea Lappa Extract

SAUSSUREA LAPPA EXTRACT HYDROGENATED

3.8

A gentle, antioxidant-rich botanical extract that may help calm skin, but research is limited and hydrogenation alters its natural composition.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Emollient

Hydrogenated Shea Butter

Hydrogenated Shea Butter

4.3

A shelf-stable, non-greasy shea butter that locks in moisture and softens skin without the natural nutty scent.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Shea Oil

Hydrogenated Shea Oil

4.0

A stabilized, non-greasy shea derivative that adds richness and slip to formulas without the meltiness of raw shea butter.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Soy Glyceride

Hydrogenated Soy Glyceride

4.3

A gentle, plant-derived emollient that softens skin without clogging pores, ideal for dry or sensitive skin.

Irritation

low

Source

semi-synthetic

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Emulsifier

Hydrogenated Soy Polyglycerides

Hydrogenated Soy Polyglycerides / Soyamide DEA

3.8

A gentle soy-derived emulsifier that helps blend oil and water in products, but its DEA component raises minor safety questions in high concentrations.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Skin Barrier Repair

Hydrogenated Sphingolipids

Hydrogenated Sphingolipids

4.5

A gentle, skin-friendly lipid that strengthens the moisture barrier and helps calm dry, sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Film Former

Hydrogenated Styrene Copolymer

HYDROGENATED DICYCLOPENTADIENE/ISOPENTENE/ISOPRENE/STYRENE COPOLYMER

3.8

A synthetic polymer that helps makeup last longer and resist water, but may feel heavy on some skin types.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Emollient

Hydrogenated Tallow Acid

Hydrogenated Tallow Acid

3.5

A thick, emollient fatty acid from animal fat that helps create rich creams and balms, but may clog pores for some skin types.

Irritation

low

Source

natural

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Emulsifier

Hydrogenated Tallow Amide

Hydrogenated Tallow Amide

3.5

A thickener and stabilizer from hydrogenated tallow, effective but may be too heavy for oily or acne-prone skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Surfactant

Hydrogenated Tallow Betaine

Hydrogenated Tallow Betaine

4.0

A mild, animal-derived surfactant that cleans effectively without over-drying, suitable for sensitive skin.

Irritation

low

Source

natural

beautyskincaresurfactant
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Emollient

Hydrogenated Tallow Glyceride Citrate

Hydrogenated Tallow Glyceride Citrate

3.8

A gentle, semi-synthetic emollient that softens skin and improves product texture, but its animal-derived origin may not suit all preferences.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Viscosity Controlling Agent

Hydrogenated Tallowalkonium Bentonite

Hydrogenated Tallowalkonium Bentonite

3.5

A safe, effective thickener for makeup and creams, but its animal-derived origin may not suit everyone.

Irritation

low

Source

semi-synthetic

beautyskincareviscosity controlling agent
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