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

Antioxidant

Deinococcus Ferment Extract

Deinococcus Ferment Extract Filtrate

4.3

A unique biotech antioxidant that helps protect skin from environmental stress and supports natural repair processes.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Delicious Raspberry Extract

Rubus Deliciosus Extract

3.8

A gentle, antioxidant-rich plant extract that may help protect skin from environmental stress, though research on this specific species is limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Fragrance Ingredient

Delta-Decalactone

DELTA-DECALACTONE

3.5

Delta-Decalactone is a pleasant-smelling fragrance ingredient with a low irritation profile, but it offers no direct skincare benefits beyond scent.

Irritation

low

Source

natural

beautyskincarefragrance
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Fragrance Ingredient

Delta-Dodecalactone

DELTA-DODECALACTONE

3.8

A synthetic scent ingredient that adds a creamy, fruity note to products; generally safe at low levels but may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Delta-Hexalactone

DELTA-HEXALACTONE

3.5

A synthetic scent molecule that adds a sweet, creamy note to products; generally safe but offers no skincare benefit.

Irritation

low

Source

synthetic

beautyskincarefragrance
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Fragrance Ingredient

Delta-Nonalactone

DELTA-NONALACTONE

3.8

Delta-Nonalactone is a synthetic fragrance ingredient that adds a creamy, coconut-like scent to products; it is generally considered safe at low concentrations but offers no skincare benefits.

Irritation

low

Source

synthetic

beautyskincarefragrance
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Fragrance

Delta-Octalactone

DELTA-OCTALACTONE

3.5

Delta-Octalactone is a synthetic fragrance ingredient that adds a creamy, coconut-like scent to products; it is generally safe at low concentrations but may cause irritation in sensitive individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Delta-Undecalactone

DELTA-UNDECALACTONE

3.5

A synthetic scent ingredient that adds a creamy, coconut-like aroma; generally considered safe at low levels but may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Exfoliant

Delta-Valerolactone

DELTA-VALEROLACTONE

3.8

A gentle exfoliating ingredient that helps smooth skin texture and improve radiance with minimal irritation.

Irritation

low

Source

synthetic

beautyskincareexfoliant
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Denaturant

Denatonium Benzoate

Denatonium Benzoate

3.0

Denatonium benzoate is a safety ingredient that makes products taste unbearably bitter to discourage accidental swallowing, but it has no direct skin benefit.

Irritation

low

Source

synthetic

beautyskincareother
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Denaturant

Denatonium Saccharide

DENATONIUM SACCHARIDE

1.5

Denatonium saccharide is a bittering agent added to discourage accidental ingestion; it has no direct skincare benefit and is used in tiny amounts.

Irritation

low

Source

synthetic

beautyskincaredenaturant
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Solvent

Denatured Alcohol

Alcohol Denat.

3.0

Denatured alcohol evaporates quickly to give a matte finish but can strip the skin's moisture barrier, making it best for oily or acne-prone skin and risky for dry or sensitive types.

Irritation

high

Source

synthetic

beautyskincaresolvent
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Chelating Agent

Dendrimer Chelating Agent

Sodium Trimethylolpropane Hydroxypropyl Iminodiacetate Dendrimer

4.3

A gentle, effective chelating agent that helps preserve formula stability and boost antioxidant performance without the irritation concerns of traditional chelators.

Irritation

low

Source

synthetic

beautyskincarechelating agent
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Delivery Agent

Dendrimer Complex

TRIMETHYLOLPROPANE HYDROXYPROPYL BIS-HYDROXYETHYLAMINE DENDRIMER

4.0

A cutting-edge synthetic molecule that helps other ingredients penetrate better and stay on skin longer, but is still being studied for long-term effects.

Irritation

low

Source

synthetic

beautyskincaredelivery agent
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Antioxidant

Dendrobium Candidum Callus Extract

Dendrobium Candidum Callus Extract

3.8

A gentle orchid-derived extract that may help protect skin from environmental stress and support hydration, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Dendrobium Candidum Callus Powder

Dendrobium Candidum Callus Powder

3.8

A gentle antioxidant-rich orchid powder that may help protect skin from environmental stress, but research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Dendrobium Huoshanense Extract

DENDROBIUM HUOSHANENSE LEAF/STEM EXTRACT

3.8

A gentle orchid extract with antioxidant potential, but research on its cosmetic benefits is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Dendrobium Nobile Protocorm Extract

DENDROBIUM NOBILE PROTOCORM EXTRACT

3.8

A gentle orchid extract that may help protect skin from environmental stress and support hydration, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Dendrobium Nobile Stem Extract

DENDROBIUM NOBILE STEM EXTRACT

4.0

A gentle orchid extract that may help hydrate and protect skin from environmental stress, though human studies are limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Dendrobium Orchid Callus Extract

DENDROBIUM MONILIFORME CALLUS CULTURE EXTRACT

3.8

A gentle, lab-grown orchid extract that may help calm skin and fight free radicals, but research is still early.

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review

Antioxidant

Dendrobium Orchid Extract

DENDROBIUM PHALAENOPSIS FLOWER EXTRACT

3.8

A gentle orchid extract that may help protect skin from environmental stress and provide light hydration, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Dendropanax Leaf Extract

DENDROPANAX MORBIFERUS LEAF EXTRACT

3.8

A gentle, antioxidant-rich plant extract that may help calm skin and fight environmental stress, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Emollient

Dendropanax Leaf Oil

DENDROPANAX MORBIFERUS LEAF OIL

3.8

A gentle, antioxidant-rich plant oil that may help soothe and moisturize skin, though research is still emerging.

Irritation

low

Source

natural

beautyskincareemollient
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Antioxidant

Dendropanax Morbiferus Callus Extract

DENDROPANAX MORBIFERUS CALLUS CULTURE EXTRACT

4.0

A plant-based, lab-grown extract that may help protect skin from environmental stress and calm irritation, though research is still emerging.

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review

Antioxidant

Dendropanax Root Extract

DENDROPANAX MORBIFERUS ADVENTITIOUS ROOT EXTRACT

3.8

A gentle, plant-derived antioxidant extract that may help calm skin and fight free radical damage, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Soothing Agent

Dendropanax Stem Sap

DENDROPANAX MORBIFERUS STEM SAP

3.8

A gentle, plant-derived sap with antioxidant and soothing potential, though research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Antioxidant

Deodar Cedar Seed Extract

Cedrus Deodara Seed Extract

3.8

A gentle, antioxidant-rich plant extract that may help calm skin and fight free radical damage, though more human studies are needed.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Emollient

Deodar Cedar Seed Oil

Cedrus Deodara Seed Oil

4.0

A gentle, antioxidant-rich oil from Himalayan cedar seeds that helps soften skin and may calm irritation, though research is still emerging.

Irritation

low

Source

natural

beautyskincareemollient
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Antioxidant

Deodar Cedar Wood Extract

Cedrus Deodara Wood Extract

3.8

A gentle, aromatic wood extract with antioxidant potential, but research on its specific skincare benefits is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Deodar Cedar Wood Oil

Cedrus Deodara Wood Oil

3.8

A natural aromatic oil that adds a woody scent to products, but may cause irritation in sensitive skin if used undiluted.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Humectant

Deoxyglutamyl Fructose

Deoxyglutamyl Fructose

4.0

A gentle, sugar-based humectant that attracts moisture to the skin and may help reduce the look of fine lines without irritation.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
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Skin-conditioning agent

Deoxyphytantriyl Palmitamide MEA

DEOXYPHYTANTRIYL PALMITAMIDE MEA

4.0

A synthetic ceramide-like ingredient that helps reinforce the skin barrier, making it a good choice for dry or sensitive skin.

Irritation

low

Source

synthetic

beautyskincarebarrier-repair
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Exfoliant

Deoxyribonuclease

Deoxyribonuclease

3.5

An enzyme that targets DNA to break down biofilm and dead cells, but its skincare benefits are still being studied.

Irritation

low

Source

biotech

beautyskincareenzyme
Read ingredient review

Preservative

Dequalinium Acetate

DEQUALINIUM ACETATE

3.0

An effective preservative with antimicrobial properties, but may cause irritation in sensitive individuals at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincarepreservative
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Skin conditioning

Desamido Collagen

Desamido Collagen

4.0

A stabilized collagen derivative that may help support skin firmness and hydration with a lower risk of irritation than traditional collagen.

Irritation

low

Source

biotech

beautyskincareanti-aging
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Humectant

Desert Algae Extract

Scenedesmus deserticola extract

4.0

A gentle, hydrating algae extract that helps skin retain moisture and defends against environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincarehumectantantioxidant
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Antioxidant

Desert Algae Ferment Extract

Scenedesmus Deserticola Ferment Extract

4.0

A gentle, antioxidant-rich algae ferment that helps hydrate and protect skin from environmental stress.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Desert Gourd Seed Extract

BAILEYA MULTIRADIATA SEED EXTRACT

3.8

A gentle, plant-based antioxidant extract that may help calm skin and fight free radical damage, though research is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Desert Lime Fruit Extract

Citrus Glauca Fruit Extract

4.0

A gentle, antioxidant-rich fruit extract that may help brighten skin and protect against environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Exfoliant

Desert Lime Fruit Powder

Citrus Glauca Fruit Powder

3.8

A gentle, natural exfoliating powder from Australian desert lime that offers mild antioxidant benefits and a touch of fruit-derived texture.

Irritation

low

Source

natural

beautyskincareexfoliant
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Emollient

Desert Lime Seed Oil

Citrus Glauca Seed Oil

4.0

A lightweight, antioxidant-rich oil from Australian desert lime seeds that hydrates and softens skin without feeling greasy.

Irritation

low

Source

natural

beautyskincareemollient
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Antioxidant

Desert Rose Callus Extract

Adenium Obesum Callus Culture Extract

3.8

A gentle, plant-derived antioxidant that may help soothe skin and fight environmental stress, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Desert Rose Leaf Cell Extract

ADENIUM OBESUM LEAF CELL EXTRACT

3.8

A gentle, lab-grown plant cell extract that may help protect skin from environmental stress, but research is still early.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Desert Willow Bark Extract

Cercidium Floridum Bark Extract

3.8

A gentle botanical extract that may help calm skin and fight free radicals, but research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Soothing Agent

Desmodium Adscendens Extract

Desmodium Adscendens Flower/Leaf/Stem Extract

3.8

A gentle plant extract with potential soothing and antioxidant benefits, though research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Soothing Agent

Desmodium Oldhamii Extract

Desmodium Oldhamii Extract

3.8

A gentle botanical extract with emerging research suggesting antioxidant and soothing benefits, but human skincare studies are limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Detonula Pumila Extract

Detonula Pumila Extract

3.8

A gentle marine extract that may help calm skin and fight environmental stress, but research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Deutzia Gracilis Extract

DEUTZIA GRACILIS LEAF/STEM EXTRACT

3.5

A gentle botanical extract with antioxidant potential, but research is limited—consider it a nice-to-have rather than a must-have ingredient.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Devil's Seaweed Extract

Laminaria Diabolica Extract

3.8

A gentle, antioxidant-rich seaweed extract that may help calm and protect skin, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Film Former

Dextran

Dextran

4.0

Dextran is a gentle, sugar-derived polymer that helps products feel smooth and hydrated without clogging pores.

Irritation

low

Source

natural

beautyskincarefilm-former
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Film Former

Dextran Hydroxypropyltrimonium Chloride

Dextran Hydroxypropyltrimonium Chloride

4.0

A gentle conditioning polymer that smooths hair and skin without heavy buildup, making it a good choice for fine hair or sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
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Film Former

Dextran Sulfate

Dextran Sulfate

3.8

Dextran sulfate is a gentle film-forming ingredient that helps soothe and protect the skin, but its benefits are mostly surface-level.

Irritation

low

Source

semi-synthetic

beautyskincarefilm-former
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Viscosity Controlling

Dextrin

Dextrin

4.0

Dextrin is a gentle, starch-derived ingredient that helps thicken formulas and improve product feel without common irritation.

Irritation

low

Source

natural

beautyskincaretexturizer
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