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

Hydrogenated Lanolin Alcohol

Hydrogenated Lanolin Alcohol

3.8

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

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Lard Glyceride

Hydrogenated Lard Glyceride

3.8

A gentle, lard-derived emollient that softens skin but may not suit vegans or those avoiding animal ingredients.

Irritation

low

Source

natural

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Emollient

Hydrogenated Lime Seed Oil

Hydrogenated Lime Seed Oil

4.0

Hydrogenated lime seed oil is a gentle, stable emollient that softens skin without clogging pores, making it a good choice for dry or sensitive skin types.

Irritation

low

Source

semi-synthetic

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Skin conditioning agent

Hydrogenated Lysophosphatidylcholine

Hydrogenated Lysophosphatidylcholine

4.3

A skin-friendly phospholipid that improves ingredient delivery and supports the moisture barrier without irritation.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Menhaden Acid

HYDROGENATED MENHADEN ACID

3.5

A gentle, fish-derived emollient that softens skin and improves product texture, but may not suit vegans or those with fish allergies.

Irritation

low

Source

natural

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Emollient

Hydrogenated Milk Lipids

Hydrogenated Milk Lipids

4.0

A gentle, milk-derived emollient that strengthens the skin barrier without clogging pores — ideal for dry or sensitive skin.

Irritation

low

Source

natural

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Emollient

Hydrogenated Mink Oil

HYDROGENATED MINK OIL

2.5

Hydrogenated mink oil is an effective emollient, but its animal origin and ethical concerns make it a poor fit for most modern skincare routines.

Irritation

low

Source

natural

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Emollient

Hydrogenated Moringa Oil

Hydrogenated Moringa Oleifera Seed Oil

4.3

A stable, non-greasy emollient that adds a silky feel to products without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Orange Seed Oil

Hydrogenated Orange Seed Oil

4.0

A stable, non-greasy emollient that softens skin without clogging pores, ideal for dry or sensitive skin types.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Ostrich Oil

Hydrogenated Ostrich Oil

3.8

A stable, animal-derived emollient that softens skin and locks in moisture, but lacks extensive human research.

Irritation

low

Source

natural

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Emollient

Hydrogenated Palm Glycerides

Hydrogenated Palmitic/Stearic/Oleic/Linoleic Glycerides

4.0

A gentle, plant-derived emollient that softens and smooths skin without clogging pores.

Irritation

low

Source

natural

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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

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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

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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

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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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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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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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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

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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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