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

Surfactant

Decyl Glucoside (C10-16)

DECETH-7 GLUCOSIDE

4.5

A gentle, non-stripping surfactant that effectively cleanses without disrupting the skin barrier, ideal for sensitive or dry skin.

Irritation

low

Source

natural

beautyskincarecleanser
Read ingredient review

Emollient

Decyl Hempseedate

DECYL HEMPSEEDATE

4.0

A lightweight, non-greasy emollient that softens skin without clogging pores, with a touch of hemp-derived fatty acid benefits.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emollient

Decyl Isostearate

DECYL ISOSTEARATE

4.0

A lightweight synthetic emollient that softens skin without a greasy feel, generally well-tolerated and non-comedogenic.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Decyl Isovalerate

Decyl Isovalerate

4.0

A lightweight, non-greasy emollient that softens skin without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emollient

Decyl Jojobate

Decyl Jojobate

4.5

A lightweight, non-greasy emollient derived from jojoba oil that softens skin without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Decyl Laurate

Decyl Laurate

4.3

A lightweight, non-greasy emollient that hydrates and softens skin while being gentle enough for sensitive and acne-prone types.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Preservative

Decyl Mercaptomethylimidazole

Decyl Mercaptomethylimidazole

3.0

A synthetic preservative booster with limited safety data; best reserved for rinse-off products if used at all.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
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Emollient

Decyl Methyl Ether

DECYL METHYL ETHER

4.0

A lightweight synthetic emollient that helps products glide on smoothly without a greasy feel, generally well-tolerated by most skin types.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emollient

Decyl Myristate

Decyl Myristate

3.8

Decyl Myristate is a lightweight emollient that softens skin, but it may clog pores for those prone to breakouts.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Decyl Oleate

Decyl Oleate

4.0

Decyl Oleate is a silky, non-greasy emollient that helps moisturizers spread easily, but it may clog pores for acne-prone skin.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emollient

Decyl Olivate

Decyl Olivate

4.3

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

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Decyl Palmitate

Decyl Palmitate

4.0

Decyl Palmitate is a lightweight, non-greasy emollient that softens skin and improves product texture, with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emollient

Decyl Propionate

Decyl Propionate

4.0

A lightweight, non-greasy emollient that hydrates and softens skin with a silky finish.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emollient

Decyl Succinate

Decyl Succinate

4.0

Decyl Succinate is a gentle, lightweight emollient that helps soften skin and improve product feel without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emollient

Decyl Vinyl Ether

DECYL VINYL ETHER

3.5

A synthetic emollient that helps products spread smoothly and resist wash-off, but lacks extensive safety data in cosmetics.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Surfactant

Decylamine Oxide

Decylamine Oxide

4.0

A gentle surfactant that helps create rich foam and thicken formulas without stripping the skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Humectant

Decylene Glycol

DECYLENE GLYCOL

4.0

Decylene Glycol is a gentle, multi-tasking ingredient that hydrates, softens skin, and helps preserve formulas without harsh preservatives.

Irritation

low

Source

synthetic

beautyskincarehumectant
Read ingredient review

Preservative booster

Decyloxazolidinone

DECYLOXAZOLIDINONE

3.8

A synthetic preservative booster that helps keep products fresh and stable, generally considered safe at low concentrations.

Irritation

low

Source

synthetic

beautyskincarepreservative
Read ingredient review

Skin conditioning agent

Decyloxyacetaldehyde

DECYLOXYACETALDEHYDE

3.5

Decyloxyacetaldehyde is a synthetic ingredient that may help improve skin texture, but research is limited and it can be irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincareconditioning agent
Read ingredient review

Emollient

Decyltetradecanoic Acid

DECYLTETRADECANOIC ACID

3.8

A gentle synthetic fatty acid that softens skin and improves product feel without common irritation.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emollient

Decyltetradecanol

DECYLTETRADECANOL

4.0

A gentle, non-greasy emollient that softens skin and improves product texture without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Emulsifier

Decyltetradeceth-10

DECYLTETRADECETH-10

4.0

A gentle synthetic emulsifier that helps mix water and oil in your skincare products without causing irritation or clogging pores.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Decyltetradeceth-15

DECYLTETRADECETH-15

4.0

A gentle synthetic emulsifier that helps create stable, creamy formulas without common irritation.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Decyltetradeceth-20

DECYLTETRADECETH-20

4.0

A gentle synthetic emulsifier that helps mix oil and water in products, with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Decyltetradeceth-200 Behenate

DECYLTETRADECETH-200 BEHENATE

4.0

A gentle, high-performance emulsifier that helps create stable, luxurious creams without common irritation concerns.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

Decyltetradeceth-200 Isostearate

DECYLTETRADECETH-200 ISOSTEARATE

4.0

A gentle, high-performance emulsifier that helps create stable, creamy textures without common irritation concerns.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

Decyltetradeceth-25

DECYLTETRADECETH-25

3.8

A gentle synthetic emulsifier that helps create stable, creamy textures without common irritation concerns.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

Decyltetradeceth-30

DECYLTETRADECETH-30

4.0

A mild, effective emulsifier that helps water and oil mix without stripping the skin, making it a good choice for sensitive skin formulas.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

Decyltetradeceth-5

DECYLTETRADECETH-5

4.0

A gentle synthetic emulsifier that helps mix water and oil in skincare products without common irritation.

Irritation

low

Source

synthetic

beautyskincareemulsifier
Read ingredient review

Preservative

DEDM Hydantoin

DEDM Hydantoin

3.5

DEDM Hydantoin is an effective preservative but may cause irritation for sensitive skin, especially at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
Read ingredient review

Surfactant

DEDM Hydantoin Dilaurate

DEDM Hydantoin Dilaurate

3.5

A mild synthetic surfactant that helps foaming and cleansing, but may cause irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Skin conditioning

Deer Antler Ferment Extract

Paecilomyces Japonica/Deer Antler Ferment Extract Filtrate

3.5

A novel fermented ingredient with promising antioxidant potential, but human skin research is very limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Skin conditioning

Deer Antler Velvet Extract

Cervus Elaphus Antler Velvet Extract

2.5

Deer antler velvet extract is a trendy but poorly studied ingredient in skincare, with anecdotal anti-aging claims and significant ethical baggage.

Irritation

low

Source

natural

beautyskincareanti-aging
Read ingredient review

Conditioning agent

Deer Blood Extract

Cervus Elaphus Blood Extract

2.5

Deer blood extract is a niche ingredient with traditional use but minimal modern research to support its cosmetic benefits.

Irritation

moderate

Source

natural

beautyskincareconditioning agent
Read ingredient review

Humectant

Deer Milk Extract

Deer Milk Extract

3.5

Deer milk extract is a gentle, moisturizing ingredient with some soothing potential, but scientific evidence is limited and it may not be suitable for vegans.

Irritation

low

Source

natural

beautyskincarehumectant
Read ingredient review

Skin conditioning

Deer Velvet Conditioned Media

Deer Velvet Mesenchymal Cell Conditioned Media

3.5

A novel biotech ingredient with promising regenerative potential, but human skincare evidence is still very limited.

Irritation

low

Source

biotech

beautyskincareanti-aging
Read ingredient review

Skin conditioning

Defatted Egg Yolk Powder

DEFATTED EGG YOLK POWDER

3.5

A protein-rich powder that can help condition skin and hair, but its benefits are not well-studied in modern cosmetics.

Irritation

low

Source

natural

beautyskincareconditioning agent
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Soothing Agent

Defatted Viburnum Opulus Flower

DEFATTED VIBURNUM OPULUS FLOWER

3.8

A gentle, antioxidant-rich flower extract that may help calm skin, but research on its cosmetic benefits is still limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Defatted Woad Seed Extract

DEFATTED ISATIS TINCTORIA SEED EXTRACT

3.8

A gentle botanical extract with antioxidant potential, but research is still early and benefits are not yet proven in human skin.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Conditioning agent

Defined Cell Culture Media

Defined Cell Culture Media

3.5

A biotech ingredient that may support skin repair, but its benefits in a jar are not well proven and it's mostly used in professional or clinical settings.

Irritation

low

Source

biotech

beautyskincareactive
Read ingredient review

Other

Defined Cell Culture Media 12

Defined Cell Culture Media 12

2.5

This is a lab growth medium for cells, not a skincare ingredient you apply directly—its presence on a label usually means it's a trace residue from biotech production.

Irritation

low

Source

biotech

beautyskincareother
Read ingredient review

Skin conditioning agent

Defined Cell Culture Media 14

Defined Cell Culture Media 14

3.5

A biotech ingredient that provides a complex blend of nutrients to support skin cell function, but its benefits in finished products are still being studied.

Irritation

low

Source

biotech

beautyskincareconditioning agent
Read ingredient review

Not applicable as a direct cosmetic ingredient

Defined Cell Culture Media 16

Defined Cell Culture Media 16

2.0

Defined Cell Culture Media 16 is a lab reagent for growing cells, not a proven skincare ingredient; its presence on a label may indicate a ferment or extract base, but direct skin benefits are unsubstantiated.

Irritation

low

Source

biotech

beautyskincarebiotechnology
Read ingredient review

Cell Culture Medium

Defined Cell Culture Media 2

Defined Cell Culture Media 2

2.0

Defined Cell Culture Media 2 is a lab-grade nutrient solution for growing cells, not a proven skincare ingredient for direct consumer use.

Irritation

low

Source

biotech

beautybiotechskincareactive
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Conditioning Agent

Defined Cell Culture Media 4

Defined Cell Culture Media 4

3.8

A cutting-edge biotech ingredient that nourishes skin cells with a tailored nutrient mix, but its novelty means long-term data is still limited.

Irritation

low

Source

biotech

beautyskincarebiotech
Read ingredient review

Processing Aid

Defined Cell Culture Media 6

Defined Cell Culture Media 6

3.0

This is a lab tool, not a skincare ingredient you apply—it helps grow cells that may later create cosmetic actives.

Irritation

low

Source

biotech

beautyskincarebiotechnology
Read ingredient review

Conditioning Agent

Defined Cell Culture Media 7

Defined Cell Culture Media 7

3.5

A lab-grown nutrient cocktail that may support skin cell health, but its benefits in skincare are still being explored and it's not a proven anti-aging ingredient.

Irritation

low

Source

biotech

beautyskincarebiotech
Read ingredient review

Conditioning Agent

Defined Cell Culture Media 8

Defined Cell Culture Media 8

3.5

A lab-grown nutrient cocktail that may support skin cell health, but research is still early and the ingredient is not yet widely studied in cosmetics.

Irritation

low

Source

biotech

beautyskincarebiotechnology
Read ingredient review

Cell Culture Medium

Defined Cell Culture Media 9

Defined Cell Culture Media 9

2.5

This is a lab-grade cell culture medium, not a proven cosmetic ingredient—its role in skincare is experimental and lacks safety data for topical use.

Irritation

low

Source

biotech

beautyskincarebiotechnology
Read ingredient review

Preservative

Dehydroacetic Acid

Dehydroacetic Acid

4.0

A widely used, low-irritation preservative that helps keep your skincare products safe from bacteria and mold.

Irritation

low

Source

synthetic

beautyskincarepreservative
Read ingredient review

Eyelash Growth Stimulant

Dehydrolatanoprost

DEHYDROLATANOPROST

3.5

Dehydrolatanoprost is a synthetic ingredient that can help eyelashes appear longer and fuller, but it may cause eye irritation and other side effects.

Irritation

moderate

Source

synthetic

beautyskincarelash enhancer
Read ingredient review

Thickener

Dehydroxanthan Gum

Dehydroxanthan Gum

4.0

A gentle, effective thickener that improves product texture without clogging pores or irritating skin.

Irritation

low

Source

biotech

beautyskincarethickener
Read ingredient review