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 20,303
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

Emulsifier

Hydrogenated Dimer Dilinoleth-80

Hydrogenated Dimer Dilinoleth-80

4.2

A gentle, plant-derived emulsifier that helps oil and water mix, making creams and lotions smooth and stable without irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

Hydrogenated Ditallowamine

Hydrogenated Ditallowamine

3.5

An effective emulsifier and antistatic agent, but may cause irritation or clog pores in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarehaircare
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

Fragrance Ingredient

Hydrogenated Ethylbicycloheptane Guaiacol

HYDROGENATED ETHYLBICYCLOHEPTANE GUAIACOL

3.5

A synthetic fragrance ingredient that adds a warm, woody scent but has limited published safety data compared to more common fragrance materials.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

Humectant

Hydrogenated Honey

Hydrogenated Honey

4.0

A stable, less sticky version of honey that hydrates and soothes skin without the mess of raw honey.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

Emulsifier

Hydrogenated Laneth-20

Hydrogenated Laneth-20

3.8

A gentle, lanolin-derived emulsifier that helps blend water and oil in formulas, with a low risk of irritation for most skin types.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

Hydrogenated Laneth-25

Hydrogenated Laneth-25

3.8

A gentle, lanolin-derived emulsifier that helps mix oil and water in skincare, with low irritation risk but potential allergy concerns for those sensitive to lanolin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

Emulsifier

Hydrogenated Lysolecithin

Hydrogenated Lysolecithin

4.0

A gentle emulsifier that helps mix oil and water in formulas and may support skin barrier function without irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

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

beautyskincareemollientdelivery agent
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review

Occlusive

Hydrogenated Mineral Oil

HYDROGENATED MINERAL OIL

3.8

A reliable, non-irritating occlusive that locks in moisture, but may feel heavy on oily or acne-prone skin.

Irritation

low

Source

semi-synthetic

beautyskincareocclusive
Read ingredient review

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

beautyskincareemollient
Read ingredient review

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

beautyskincareemollient
Read ingredient review