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

Hexyldodecyl Salicylate

Hexyldodecyl Salicylate

4.0

A gentle emollient that helps soften skin and improve product texture, with low irritation potential.

Irritation

low

Source

synthetic

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Emollient

Hibiscus Abelmoschus Seed Oil

Hibiscus Abelmoschus Seed Oil

4.0

A gentle, naturally scented oil that hydrates and softens skin without clogging pores, ideal for sensitive and dry skin types.

Irritation

low

Source

natural

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Emollient

High Oleic Sunflower Oil

HELIANTHUS ANNUUS HYBRID OIL

4.5

A non-greasy, stable plant oil that hydrates and supports the skin barrier without clogging pores.

Irritation

low

Source

natural

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Emollient

Homonopal

Homonopal

3.5

Homonopal is a synthetic emollient that helps products feel smooth and non-greasy, but research on its long-term effects is limited.

Irritation

low

Source

synthetic

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Emollient

Hoplostethus Oil

HOPLOSTETHUS OIL

3.8

Hoplostethus oil is a rich emollient that helps soften and condition skin, but its sustainability concerns make it a less common choice today.

Irritation

low

Source

natural

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Emollient

Horse Fat

HORSE FAT

3.5

Horse fat is a traditional emollient that can soften skin, but it's not widely studied and may feel heavy for oily skin types.

Irritation

low

Source

natural

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Emollient

Hydnocarpus Pentandrus Kernel Oil

HYDNOCARPUS PENTANDRUS KERNEL OIL

3.8

A traditional emollient oil with moisturizing benefits, but limited modern research and a moderate chance of clogging pores for some skin types.

Irritation

low

Source

natural

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Emollient

Hydrogenated Argan Oil

Hydrogenated Argania Spinosa Kernel Oil

4.3

A stable, non-greasy emollient that locks in moisture and improves product texture, ideal for dry or sensitive skin.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Avocado Oil

Hydrogenated Avocado Oil

4.0

A gentle, non-greasy emollient that strengthens the skin barrier and is well-tolerated by most skin types.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Baobab Seed Oil

HYDROGENATED ADANSONIA DIGITATA SEED OIL

4.0

A gentle, non-greasy emollient that locks in moisture and gives products a smooth, velvety feel.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Camelina Oil

HYDROGENATED CAMELINA SATIVA SEED OIL

4.0

A gentle, plant-based emollient that locks in moisture without clogging pores—great for dry or sensitive skin.

Irritation

low

Source

natural

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Emollient

Hydrogenated Camellia Seed Oil

HYDROGENATED CAMELLIA OLEIFERA SEED OIL

4.3

A gentle, non-greasy emollient that locks in moisture and gives a silky feel — great for dry or sensitive skin.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Catnip Oil

HYDROGENATED NEPETA CATARIA OIL

3.5

A gentle, plant-derived emollient that softens skin with low irritation risk, though research on its unique benefits is still limited.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Didecene

Hydrogenated Didecene

4.0

A lightweight, non-greasy emollient that spreads easily and leaves skin feeling soft without clogging pores.

Irritation

low

Source

synthetic

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Emollient

Hydrogenated Didodecene

Hydrogenated Didodecene

4.0

A lightweight, synthetic emollient that improves product texture and leaves skin feeling silky without clogging pores.

Irritation

low

Source

synthetic

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Emollient

Hydrogenated Difarnesene

Hydrogenated Difarnesene

4.5

A next-generation, plant-derived emollient that feels lightweight and non-greasy, with a strong sustainability profile.

Irritation

low

Source

biotech

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Emollient

Hydrogenated Diterpene

HYDROGENATED DITERPENE

3.8

A gentle, plant-derived emollient that improves product texture and skin feel without clogging pores or causing irritation.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Egg Oil

Hydrogenated Egg Oil

4.0

A gentle, nourishing emollient that helps soften and smooth skin without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Ethylhexyl Olivate

Hydrogenated Ethylhexyl Olivate

4.3

A gentle, olive-derived emollient that hydrates and softens skin without clogging pores, suitable for most skin types.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Farnesene

Hydrogenated Farnesene

4.5

A lightweight, plant-derived emollient that hydrates without greasiness and is well-tolerated by most skin types.

Irritation

low

Source

natural

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Emollient

Hydrogenated Grapefruit Seed Oil

HYDROGENATED GRAPEFRUIT SEED OIL

3.8

A gentle, hydrogenated oil that softens and protects skin without clogging pores, but offers limited antioxidant benefits compared to unprocessed grapefruit seed oil.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Hazelnut Oil

HYDROGENATED HAZELNUT OIL

4.0

A stable, non-greasy emollient that locks in moisture without clogging pores, ideal for dry or sensitive skin.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Hemp Seed Oil

Hydrogenated Hemp Seed Oil

4.0

A gentle, non-greasy emollient that strengthens the skin barrier and adds richness to products without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Horse Fat

HYDROGENATED HORSE FAT

3.5

A rich, animal-derived emollient that softens and seals in moisture, but may be too heavy for oily or acne-prone skin.

Irritation

low

Source

natural

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Emollient

Hydrogenated Isopropyl Jojobate

Hydrogenated Isopropyl Jojobate

4.5

A lightweight, non-greasy emollient that closely resembles skin's natural oils, making it an excellent choice for all skin types, especially oily or acne-prone skin.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Japan Wax

Hydrogenated Japan Wax

4.0

A gentle, plant-based wax that adds structure and a smooth feel to balms and sticks without common irritation.

Irritation

low

Source

natural

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Emollient

Hydrogenated Jojoba Alcohol

Hydrogenated Jojoba Alcohol

4.3

A gentle, plant-based emollient that improves product texture and skin feel without clogging pores or causing irritation.

Irritation

low

Source

natural

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Emollient

Hydrogenated Jojoba Oil

Hydrogenated Jojoba Oil

4.5

A gentle, non-greasy wax that locks in moisture and gives products a smooth, silky feel without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Jojoba Wax

Hydrogenated Jojoba Wax

4.3

A gentle, plant-based wax that locks in moisture and gives products a smooth, creamy feel without clogging pores.

Irritation

low

Source

natural

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Emollient

Hydrogenated Lacquer Tree Peel Wax

Hydrogenated Rhus Verniciflua Peel Cera

3.8

A plant-based wax that gives lip and cream products a smooth, glossy feel, but research on its specific benefits is limited.

Irritation

low

Source

natural

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Emollient

Hydrogenated Laneth-5

Hydrogenated Laneth-5

3.5

Hydrogenated Laneth-5 is a gentle, lanolin-derived emollient that helps soften skin and stabilize mixtures of oil and water, but it may not suit those with lanolin allergies.

Irritation

low

Source

semi-synthetic

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