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 20,769
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

Film Former

Hydrolyzed Carnauba Wax

Hydrolyzed Carnauba Wax

3.8

A gentle, plant-derived film-former that helps lock in moisture and smooth the skin's surface without clogging pores.

Irritation

low

Source

natural

beautyskincarefilm-former
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Humectant

Hydrolyzed Carob Gum Extract

Hydrolyzed Ceratonia Siliqua Gum Extract

4.0

A gentle, plant-derived humectant that helps hydrate and soothe the skin while supporting a healthy microbiome.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Hydrolyzed Carob Seed Extract

Hydrolyzed Ceratonia Siliqua Seed Extract

4.0

A gentle, plant-derived humectant that helps attract moisture to the skin without common irritation or clogging concerns.

Irritation

low

Source

natural

beautyskincarehumectant
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Antioxidant

Hydrolyzed Carrot Extract

Hydrolyzed Carrot Extract

4.0

A gentle antioxidant-rich extract that may help protect skin from environmental stress and support a healthy-looking complexion.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Cassava Root Extract

Hydrolyzed Manihot Esculenta Tuber Extract

3.8

A gentle, plant-derived humectant that helps attract moisture to the skin, with emerging research suggesting antioxidant and soothing benefits.

Irritation

low

Source

natural

beautyskincarehumectant
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Antioxidant

Hydrolyzed Cassia Bark Extract

Hydrolyzed Cinnamomum Cassia Bark Extract

3.8

A gentle antioxidant extract from cassia bark that may help calm skin and fight free radicals, but research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Hydrolyzed Cattail Pollen & Root Extract

Hydrolyzed Typha Angustifolia Pollen/Root Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Caviar Extract

Hydrolyzed Caviar Extract

3.8

Hydrolyzed caviar extract is a luxury humectant that provides surface moisture and amino acids, but its anti-aging benefits are not strongly supported by independent research.

Irritation

low

Source

natural

beautyskincarehumectantskin-conditioning agent
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Antioxidant

Hydrolyzed Cherimoya Fruit Extract

Hydrolyzed Annona Cherimola Fruit Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Hydrolyzed Chestnut Extract

Hydrolyzed Chestnut Extract

4.0

A mild, antioxidant-rich extract that helps calm skin and defend against environmental stress—great for sensitive or reactive skin types.

Irritation

low

Source

natural

beautyskincareantioxidant
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Film Former

Hydrolyzed Chitosan Ferulyl Linoleate

Hydrolyzed Chitosan Ferulyl Linoleate

4.0

A gentle, multifunctional ingredient that combines antioxidant protection with a light film-forming effect, suitable for most skin types.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Antioxidant

Hydrolyzed Citrus Peel Extract

Hydrolyzed Citrus Sphaerocarpa Peel Extract

4.0

A gentle, antioxidant-rich citrus extract that may help brighten skin and protect against environmental stress, though human studies are limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Cladosiphon Extract

Hydrolyzed Cladosiphon Novae-Caledoniae Extract

4.0

A gentle, hydrating seaweed extract that helps skin retain moisture and may calm irritation, though research is still emerging.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Hydrolyzed Cockscomb

Hydrolyzed Cockscomb

4.0

A gentle, plant-based humectant that helps skin hold onto moisture and may support a smoother appearance.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Hydrolyzed Cockscomb Extract

HYDROLYZED COCKSCOMB EXTRACT

4.0

A gentle, plant-based humectant that helps hydrate and plump the skin, similar to hyaluronic acid but from a botanical source.

Irritation

low

Source

natural

beautyskincarehumectant
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Emollient

Hydrolyzed Cocoa Butter

Hydrolyzed Theobroma Cacao Seed Butter

4.0

A lighter, water-friendly version of cocoa butter that hydrates and softens skin without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Antioxidant

Hydrolyzed Cocoa Fruit

Hydrolyzed Cocoa Fruit

4.0

Hydrolyzed cocoa fruit is a gentle antioxidant-rich ingredient that helps hydrate and protect skin from environmental stress.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Collagen

Hydrolyzed Collagen

4.0

Hydrolyzed collagen is a well-tolerated humectant that draws moisture to the skin and forms a temporary film for a smoother feel, but it cannot replace lost collagen deep in the skin.

Irritation

low

Source

natural

beautyskincarehumectant
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Film-Forming Agent

Hydrolyzed Conalbumin

Hydrolyzed Conalbumin

3.5

Hydrolyzed conalbumin is a gentle egg-derived protein that forms a light film on skin to help retain moisture and temporarily smooth fine lines.

Irritation

low

Source

natural

beautyskincarefilm-former
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Film Former

Hydrolyzed Conchiolin Protein

Hydroxypropyltrimonium Hydrolyzed Conchiolin Protein

4.0

A gentle, protein-rich ingredient from pearl shells that helps smooth hair and temporarily plump skin by forming a light film.

Irritation

low

Source

natural

beautyskincarehaircare
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Soothing Agent

Hydrolyzed Coral

HYDROLYZED CORAL

3.5

Hydrolyzed coral is a mineral-rich ingredient that may help soothe and hydrate the skin, but scientific evidence is limited and sustainability concerns exist.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Humectant

Hydrolyzed Corallina Extract

Hydrolyzed Corallina Officinalis Extract

4.0

A gentle, hydrating seaweed extract that may help calm irritation and support the skin barrier.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Antioxidant

Hydrolyzed Coriander Fruit Extract

Hydrolyzed Coriandrum Sativum Fruit Extract

3.8

A gentle, antioxidant-rich plant extract that may help protect skin from environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Surfactant

Hydrolyzed Corn Protein Surfactant

SODIUM/TEA-UNDECYLENOYL HYDROLYZED CORN PROTEIN

4.0

A gentle, protein-based surfactant that cleans without stripping, making it ideal for sensitive skin and hair.

Irritation

low

Source

semi-synthetic

beautyskincarehaircarecleansing agent
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Hair Conditioning Agent

Hydrolyzed Corn Soy Wheat Protein Complex

HYDROLYZED CORN/SOY/WHEAT PROTEIN THIOGLYCOLAMIDE/THIOPROPIONAMIDE

3.8

A modified plant protein that bonds to hair to strengthen and repair damage, but its synthetic modification may not suit all preferences.

Irritation

low

Source

semi-synthetic

beautyhaircareconditioning agent
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Humectant

Hydrolyzed Cottonseed Protein

Hydrolyzed Cottonseed Protein

4.0

A gentle, plant-based protein that helps reinforce the skin barrier and improve moisture retention without irritation.

Irritation

low

Source

natural

beautyskincarehumectant
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Antioxidant

Hydrolyzed Cranberry Extract

Hydrolyzed Cranberry Fruit/Leaf Extract

3.8

A gentle antioxidant-rich extract that may help protect skin from environmental stress, but research on its topical benefits is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Cucumber Fruit

Hydrolyzed Cucumber Fruit

4.0

A gentle, water-loving derivative of cucumber that helps hydrate and soothe the skin, ideal for sensitive and dry types.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Hydrolyzed Cupuaçu Fruit

HYDROLYZED THEOBROMA GRANDIFLORUM FRUIT

4.0

A gentle, antioxidant-rich humectant from cupuaçu fruit that helps hydrate and protect the skin without clogging pores.

Irritation

low

Source

natural

beautyskincarehumectant
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Antioxidant

Hydrolyzed Damask Rose Extract

Hydrolyzed Rosa Damascena Flower Extract

4.0

A gentle, antioxidant-rich rose extract that helps calm skin and fight free radical damage, suitable for most skin types.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Eel Head Extract

HYDROLYZED EEL HEAD EXTRACT

3.5

A novel marine-derived peptide ingredient that may support skin hydration and firmness, but research is very limited.

Irritation

low

Source

natural

beautyskincarehumectant
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Film Former

Hydrolyzed Egg Protein

Hydrolyzed Egg Protein

4.0

Hydrolyzed egg protein is a gentle, natural ingredient that helps strengthen hair and temporarily smooth the skin's surface, but it is not a deep moisturizer or repair agent.

Irritation

low

Source

natural

beautyskincarehaircare
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Humectant

Hydrolyzed Eggshell Membrane

HYDROLYZED OVUM SHELL MEMBRANE

4.0

A natural, protein-packed ingredient that helps hydrate and support skin barrier function, with low irritation potential.

Irritation

low

Source

natural

beautyskincarehumectant
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Antioxidant

Hydrolyzed Einkorn Wheat Seed Extract

Hydrolyzed Triticum Monococcum Seed Extract

4.0

A gentle, antioxidant-rich extract from ancient einkorn wheat that may help protect and hydrate skin, but research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Elastin

Hydrolyzed Elastin

4.0

Hydrolyzed Elastin helps temporarily plump and smooth skin by depositing moisture and forming a light film, but it cannot rebuild your skin's own elastin.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Hydrolyzed Erythrina Edulis Seed

Hydrolyzed Erythrina Edulis Seed

3.8

A gentle plant protein that helps hydrate and temporarily smooth the skin's surface, though research on its specific benefits is still limited.

Irritation

low

Source

natural

beautyskincarehumectantfilm-former
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Antioxidant

Hydrolyzed Eugenia Edulis Fruit

Hydrolyzed Eugenia Edulis Fruit

3.8

A gentle, antioxidant-rich fruit extract that may help protect skin from environmental stress and support hydration.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Euglena Extract

Hydrolyzed Euglena Gracilis Extract

4.0

A gentle, algae-derived ingredient that helps hydrate and support the skin barrier, with some antioxidant potential.

Irritation

low

Source

natural

beautyskincarehumectant
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Film Former

Hydrolyzed Extensin

Hydrolyzed Extensin

4.0

A gentle plant protein that may help improve skin firmness and reduce fine lines, but research is still early.

Irritation

low

Source

natural

beautyskincareanti-aging
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