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

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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Humectant

Hydrolyzed Fibroin

Hydrolyzed Fibroin

4.0

Hydrolyzed fibroin is a gentle silk protein that helps attract moisture to skin and hair, leaving them feeling soft and smooth without heavy residue.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Hydrolyzed Fish Cartilage

Hydrolyzed Fish Cartilage

3.8

A moisturizing protein from fish cartilage that helps hydrate and support skin barrier function, but evidence is limited and it may not suit vegans or those with fish allergies.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Hydrolyzed Fish Egg Membrane Extract

Hydrolyzed Fish Egg Membrane Extract Filtrate

3.8

A gentle, protein-rich ingredient from fish egg membranes that helps hydrate and condition skin, but research is still limited.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Hydrolyzed Fish Egg Shell Extract

HYDROLYZED FISH EGG SHELL EXTRACT

3.8

A gentle, marine-sourced humectant that may help hydrate and temporarily smooth the skin, but research is limited and it's not a standout compared to well-studied alternatives.

Irritation

low

Source

natural

beautyskincarehumectant
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Film-Former

Hydrolyzed Fish Scale Extract

HYDROLYZED FISH SCALE EXTRACT

3.5

A novel marine-derived protein that may help smooth and hydrate skin, but research is limited and it's not a must-have ingredient.

Irritation

low

Source

natural

beautyskincarefilm-former
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Antioxidant

Hydrolyzed Fo-Ti Root Extract

HYDROLYZED POLYGONUM MULTIFLORUM ROOT EXTRACT

3.8

A gentle, antioxidant-rich root extract that may help calm skin and support a more even tone, though human studies are limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Hydrolyzed Forsythia Extract

HYDROLYZED FORSYTHIA VIRIDISSIMA FRUIT/ROOT EXTRACT

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Fucoidan

Hydrolyzed Fucoidan

4.0

A gentle, seaweed-derived humectant that attracts moisture to the skin and may help calm irritation.

Irritation

low

Source

natural

beautyskincarehumectant
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Film-Former

Hydrolyzed Furcellaran

HYDROLYZED FURCELLARAN

4.0

A gentle seaweed-derived film-former that helps skin feel smooth and hydrated without clogging pores.

Irritation

low

Source

natural

beautyskincarefilm-former
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Film Former

Hydrolyzed Gadidae Protein

Hydrolyzed Gadidae Protein

4.0

A fish-derived protein that temporarily strengthens hair and lightly hydrates skin, best for those seeking natural, protein-rich formulas.

Irritation

low

Source

natural

beautyskincarehaircare
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Antioxidant

Hydrolyzed Gardenia Florida Extract

Hydrolyzed Gardenia Florida Extract

4.0

A gentle, antioxidant-rich botanical extract that helps calm skin and fight environmental stress, ideal for sensitive or aging skin.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Hydrolyzed Ginseng Saponins

Hydrolyzed Ginseng Saponins

4.0

A gentle, antioxidant-rich ingredient that may help protect skin from environmental stress and support a more even tone.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Glucosyl Stevioside

Hydrolyzed Glucosyl Stevioside

4.0

A mild, sugar-modified stevia derivative that helps hydrate skin without the sweetness or stickiness of raw stevia.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
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Humectant

Hydrolyzed Glycosaminoglycans

Hydrolyzed Glycosaminoglycans

4.3

A powerful humectant that draws moisture into the skin and helps maintain its structural support, making it a great choice for dry or aging skin.

Irritation

low

Source

natural

beautyskincarehumectant
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Soothing Agent

Hydrolyzed Glycyrrhizinate

Hydrolyzed Glycyrrhizinate

4.3

A gentle, licorice-derived ingredient that helps calm redness and even out skin tone without irritation.

Irritation

low

Source

semi-synthetic

beautyskincaresoothing agent
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Skin conditioning agent

Hydrolyzed Goat Milk Extract

Hydrolyzed Goat Milk Extract

4.0

A nourishing, protein-packed ingredient that hydrates and soothes without clogging pores.

Irritation

low

Source

natural

beautyskincareconditioning agent
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Antioxidant

Hydrolyzed Goji Berry

Hydrolyzed Lycium Barbarum Fruit

4.0

Hydrolyzed Goji Berry is a gentle antioxidant-rich ingredient that helps protect skin from environmental stress while providing light hydration.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Hydrolyzed Goji Berry Extract

Hydrolyzed Lycium Barbarum Fruit Extract

3.8

A gentle antioxidant extract from goji berries that may help protect skin from environmental stress, but research on its topical benefits is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Hydrolyzed Grape Callus Extract

Hydrolyzed Grape Callus Extract

4.0

A gentle, antioxidant-rich ingredient from grape cells that may help protect skin from environmental stress and support a more even tone.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Hydrolyzed Green Tea & Bamboo & Ginseng Complex

HYDROLYZED CAMELLIA SINENSIS LEAF/PHYLLOSTACHYS BAMBUSOIDES LEAF/STEM/PANAX GINSENG ROOT

4.0

A gentle, antioxidant-rich botanical blend that helps calm and protect skin, but its effectiveness depends on the hydrolysis process used.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Hydrolyzed Green Tea Extract

Hydrolyzed Camellia Sinensis Leaf Extract

4.0

A gentle, antioxidant-rich ingredient that helps protect skin from environmental stress and soothes irritation.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Hydrolyzed Green Tea Leaf

Hydrolyzed Camellia Sinensis Leaf

4.2

A gentle, antioxidant-rich derivative of green tea that helps protect skin from environmental stress and soothe irritation.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Hydrolyzed Green Tea Seed Extract

Hydrolyzed Camellia Sinensis Seed Extract

4.0

A gentle, antioxidant-rich extract from green tea seeds that helps protect skin from environmental stress while soothing irritation.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Halymenia Seaweed

Hydrolyzed Halymenia Durvillei Polysaccharide

4.0

A gentle, hydrating seaweed extract that helps skin retain moisture and feel soothed, though research is still emerging.

Irritation

low

Source

natural

beautyskincarehumectant
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Antioxidant

Hydrolyzed Hardy Kiwi Leaf Extract

HYDROLYZED ACTINIDIA ARGUTA LEAF EXTRACT

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Hair Conditioner

Hydrolyzed Hazelnut Protein

Hydrolyzed Hazelnut Protein

4.0

A gentle, plant-based protein that can temporarily strengthen hair and lightly moisturize skin without clogging pores.

Irritation

low

Source

natural

beautyskincarehaircare
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Hair conditioning agent

Hydrolyzed Hemp Seed Protein

HYDROLYZED HEMP SEED PROTEIN

4.0

A gentle, plant-derived protein that can help strengthen hair and temporarily smooth the skin's surface without irritation.

Irritation

low

Source

natural

beautyskincarehaircare
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Humectant

Hydrolyzed Honey

Hydrolyzed Honey

4.3

Hydrolyzed honey is a gentle, water-soluble humectant that helps attract moisture to the skin and may offer mild soothing benefits, making it a good option for dry or sensitive skin.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Hydrolyzed Honey Protein

Hydrolyzed Honey Protein

4.0

Hydrolyzed honey protein is a gentle, natural humectant that hydrates and strengthens skin and hair without clogging pores.

Irritation

low

Source

natural

beautyskincarehaircare
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Emollient

Hydrolyzed Horse Fat Extract

HYDROLYZED HORSE FAT EXTRACT

3.5

An unusual emollient that may help soften and condition skin, but research is very limited and it may not suit acne-prone skin.

Irritation

low

Source

natural

beautyskincareemollient
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Humectant

Hydrolyzed Horse Placenta Extract

Hydrolyzed Horse Placenta Extract

3.5

A protein-rich extract that may help hydrate and support skin repair, but human studies are limited and ethical sourcing is a concern.

Irritation

low

Source

natural

beautyskincarehumectant
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Skin Conditioning Agent

Hydrolyzed Horse Placenta/Umbilical Extract

HYDROLYZED HORSE PLACENTA/UMBILICAL EXTRACT

3.5

A protein-rich animal-derived extract that may help hydrate and condition skin, but lacks strong independent research and raises ethical considerations.

Irritation

low

Source

natural

beautyskincareconditioning agent
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Humectant

Hydrolyzed Hyaluronate with Optical Brightener

Fluorescent Brightener 264, Hydrolyzed Hyaluronate

3.0

Hydrolyzed hyaluronate provides light hydration, but the fluorescent brightener is an optical additive with no proven skincare benefit and may cause skin sensitivity in some people.

Irritation

low

Source

semi-synthetic

beautyskincarehumectantoptical agent
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Humectant

Hydrolyzed Irish Moss Extract

Hydrolyzed Chondrus Crispus Extract

4.0

A gentle, hydrating seaweed extract that supports moisture retention and soothes the skin without clogging pores.

Irritation

low

Source

natural

beautyskincarehumectant
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Antioxidant

Hydrolyzed Java Apple Extract

Hydrolyzed Syzygium Samarangense Fruit Extract

3.8

A gentle, antioxidant-rich fruit extract that may help protect skin from environmental stress, though research on its cosmetic benefits is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Jellyfish Extract

Hydrolyzed Jellyfish Extract

3.8

A marine extract that may help hydrate and calm the skin, but research is still early and sustainability concerns exist.

Irritation

low

Source

natural

beautyskincarehumectant
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Soothing Agent

Hydrolyzed Job's Tears Extract

Hydrolyzed Coix Lacryma-Jobi Ma-Yuen Seed Extract

4.0

A gentle, plant-derived extract that may help calm irritation and support skin hydration, though research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Humectant

Hydrolyzed Job's Tears Seed

HYDROLYZED COIX LACRYMA-JOBI MA-YUEN SEED

4.0

A gentle, plant-derived humectant that helps soothe and hydrate the skin, with some antioxidant potential.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Emollient

Hydrolyzed Jojoba Esters

HYDROLYZED JOJOBA ESTERS

4.5

A lightweight, non-greasy moisturizer derived from jojoba oil that hydrates and softens skin and hair with minimal irritation risk.

Irritation

low

Source

natural

beautyskincarehaircareemollient
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Hair Conditioning Agent

Hydrolyzed Jojoba Protein

Hydroxypropyltrimonium Hydrolyzed Jojoba Protein

4.0

A gentle, plant-derived protein that helps strengthen hair and lightly moisturize skin without irritation.

Irritation

low

Source

natural

beautyskincarehaircare
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