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 1,094
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

Arginine Aspartate

Arginine Aspartate

4.0

A gentle amino acid salt that helps maintain skin hydration and supports a healthy moisture barrier without irritation.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
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Humectant

Arthrobacter Fermented Hyaluronic Acid

ARTHROBACTER/HYALURONIC ACID FERMENT FILTRATE

4.0

A biotech humectant that helps skin hold onto moisture, with a lower molecular weight for deeper penetration than standard hyaluronic acid.

Irritation

low

Source

biotech

beautyskincarehumectant
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Antioxidant

Ascorbyl Hyaluronate

Ascorbyl Hyaluronate

4.3

A gentle, stable vitamin C derivative that also delivers hyaluronic acid's moisture-binding power, ideal for brightening and hydrating without irritation.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidanthumectant
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Antioxidant

Ascorbyl Propyl Hyaluronate

ASCORBYL PROPYL HYALURONATE

4.3

A gentle, stable vitamin C derivative fused with hyaluronic acid that brightens and hydrates without the sting of pure L-ascorbic acid.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidanthumectant
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Humectant

Asian Pear Fruit Juice

Pyrus Bretschneideri Fruit Juice

4.0

Asian pear fruit juice is a gentle, water-like ingredient that adds light hydration and a touch of antioxidant protection, but it's not a powerhouse active.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Asian Pear Juice

Pyrus Pyrifolia Fruit Juice

3.8

Asian pear juice is a gentle, hydrating ingredient that adds a touch of natural antioxidant power to skincare, but its benefits are backed by limited direct research.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Asparagine

Asparagine

4.0

Asparagine is a gentle, naturally occurring amino acid that helps attract and retain moisture in the skin, making it a safe hydrating ingredient for most skin types.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Aspartic Acid

Aspartic Acid

4.0

Aspartic acid is a gentle, water-binding amino acid that helps keep skin hydrated and supports a balanced skin surface pH.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Aspergillus Ferment Extract

ASPERGILLUS FERMENT EXTRACT FILTRATE

4.0

A gentle, fermented ingredient that helps hydrate and condition skin without irritation, but research on its specific benefits is still emerging.

Irritation

low

Source

biotech

beautyskincarehumectant
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Humectant

Atemoya Fruit Water

ANNONA ATEMOYA FRUIT WATER

3.8

A gentle, water-based fruit extract that provides light hydration and antioxidant benefits, but research on its specific effects is still limited.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Avocado Fruit Water

Persea Gratissima Fruit Water

4.0

Avocado Fruit Water is a gentle, hydrating base ingredient that provides light antioxidant benefits without the richness of avocado oil.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Bacillus Ferment Filtrate

BACILLUS/GLUTAMIC ACID FERMENT FILTRATE

4.0

A gentle, biotech-derived humectant that helps hydrate and condition the skin, with low irritation potential.

Irritation

low

Source

biotech

beautyskincarehumectant
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Skin Conditioning Agent

Bacillus Soybean Ferment Extract

BACILLUS/FOLIC ACID/SOYBEAN FERMENT EXTRACT

4.0

A gentle, fermented ingredient that helps hydrate and condition skin, but its benefits come from the fermentation process rather than the folic acid itself.

Irritation

low

Source

biotech

beautyskincarehumectant
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Humectant

Bakuhan

Bakuhan

3.8

Bakuhan is a gentle, rice-derived humectant that helps hydrate and soothe the skin, but research on its benefits is still emerging.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Bamboo Juice

Phyllostachys Bambusoides Juice

4.0

A gentle, hydrating plant juice that provides light moisture and antioxidant protection, ideal for sensitive or dehydrated skin.

Irritation

low

Source

natural

beautyskincarehumectantantioxidant
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Humectant

Bamboo Sap

Phyllostachys Pubescens Sap

4.0

A gentle, watery sap that helps hydrate and soothe the skin, with early research suggesting antioxidant benefits.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Bamboo Sap Extract

Bambusa Vulgaris Sap Extract

4.0

A gentle, plant-based humectant that helps hydrate and soothe the skin, though research on its specific benefits is still emerging.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Bamboo Shoot Water

Phyllostachys Edulis Shoot Water

4.0

A gentle, plant-derived water that provides light hydration and a soothing feel, ideal for sensitive or dehydrated skin.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Bamboo Water

BAMBUSA VULGARIS WATER

4.0

A gentle, water-like ingredient that adds light hydration and a touch of antioxidants, ideal for sensitive or dehydrated skin.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Banana Fruit Extract

Musa Sapientum Fruit Extract

4.0

Banana Fruit Extract is a gentle, natural humectant that helps hydrate and soothe the skin, making it a nice addition to moisturizing formulas.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Banana Fruit Juice

Musa Paradisiaca Fruit Juice

3.8

Banana fruit juice is a gentle, natural hydrator that can soothe and soften skin, but its benefits are mostly anecdotal and less studied than other fruit extracts.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Banana Pulp Extract

Musa Sapientum Pulp Extract

4.0

Banana pulp extract is a gentle, natural humectant that helps hydrate and soothe the skin, but its benefits are mostly anecdotal with limited clinical backing.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Banana Water

Musa Sapientum Water

3.8

Banana water is a gentle, hydrating ingredient that adds a touch of soothing moisture to skincare products, but it's not a powerhouse active.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Barley Ferment Filtrate

Saccharomyces/Barley Seed Ferment Filtrate

4.0

A gentle fermented ingredient that hydrates and supports skin barrier health, ideal for sensitive or dry skin types.

Irritation

low

Source

biotech

beautyskincarehumectant
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Humectant

Barley Leaf Juice

HORDEUM VULGARE LEAF JUICE

3.8

Barley Leaf Juice is a gentle, hydrating ingredient that may help calm skin and provide antioxidant protection, but research is still limited.

Irritation

low

Source

natural

beautyskincarehumectant
Read ingredient review

Humectant

Barley Seed Water

Hordeum Vulgare Seed Water

4.0

Barley Seed Water is a gentle, hydrating alternative to plain water in skincare, offering light nourishment and soothing benefits.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Barley Stem Water

Hordeum Vulgare Stem Water

3.8

Barley Stem Water is a gentle, plant-derived water alternative that provides light hydration and soothing benefits, but it lacks strong independent research.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Beet Root Juice

Beta Vulgaris Root Juice

4.0

Beet root juice is a gentle, hydrating ingredient with antioxidant benefits, but its bright red color can stain fabrics and skin temporarily.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Benzyl Hyaluronate

Benzyl Hyaluronate

4.0

A gentle, modified hyaluronic acid that hydrates and plumps skin with low irritation risk.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
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Humectant

Benzyl PCA

Benzyl PCA

3.8

Benzyl PCA is a gentle humectant that helps attract moisture to the skin, but it's less studied than more common hydrators like glycerin or hyaluronic acid.

Irritation

low

Source

synthetic

beautyskincarehumectant
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Humectant

Beta-Glucan

Beta-Glucan

4.5

A gentle, hydrating sugar that calms irritation and supports the skin barrier without clogging pores.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Beta-Glucan Palmitate

Beta-Glucan Palmitate

4.0

A gentle, semi-synthetic humectant that helps hydrate and calm the skin, with improved stability over plain beta-glucan.

Irritation

low

Source

semi-synthetic

beautyskincarehumectantsoothing agent
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Humectant

Betaine

Betaine

4.3

Betaine is a gentle, naturally sourced humectant that helps hydrate and soothe the skin without irritation, making it ideal for sensitive skin.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Betula Costata Sap

Betula Costata Sap

4.0

A gentle, hydrating sap from Korean birch trees that helps soothe and refresh the skin without clogging pores.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Bifida Polysaccharide

Bifida Polysaccharide

4.2

A gentle, fermented ingredient that helps strengthen the skin barrier and improve moisture retention, popular in K-beauty and probiotic skincare.

Irritation

low

Source

biotech

beautyskincarehumectant
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Humectant

Biosaccharide Gum-1

BIOSACCHARIDE GUM-1

4.3

A gentle, biotech-derived sugar that hydrates and calms skin without stickiness, ideal for sensitive or dehydrated skin.

Irritation

low

Source

biotech

beautyskincarehumectant
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Humectant

Biosaccharide Gum-2

Biosaccharide Gum-2

4.2

A gentle, sugar-based humectant that hydrates and soothes without clogging pores, ideal for sensitive or dehydrated skin.

Irritation

low

Source

biotech

beautyskincarehumectant
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Humectant

Biosaccharide Gum-3

Biosaccharide Gum-3

4.3

A gentle, biotech-derived humectant that hydrates and soothes skin while supporting a healthy barrier.

Irritation

low

Source

biotech

beautyskincarehumectant
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Humectant

Biosaccharide Gum-4

BIOSACCHARIDE GUM-4

4.2

A gentle, fermented sugar derivative that hydrates and calms skin without clogging pores—great for sensitive and dry types.

Irritation

low

Source

biotech

beautyskincarehumectant
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Humectant

Biosaccharide Gum-5

BIOSACCHARIDE GUM-5

4.3

A gentle, sugar-based humectant that hydrates and calms skin without clogging pores.

Irritation

low

Source

biotech

beautyskincarehumectant
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Humectant

Birch Bark Water

Betula Alba Bark Water

4.0

Birch bark water is a gentle, hydrating botanical water that provides antioxidants and a soothing feel, ideal for sensitive or dry skin types.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Birch Leaf Water

Betula Alba Leaf Water

4.0

Birch leaf water is a gentle, hydrating botanical water that can soothe and refresh the skin, but its benefits are mild compared to more concentrated extracts.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Birch Sap

Betula Alba Juice

4.0

Birch sap is a gentle, hydrating water-like ingredient that provides light moisture and soothing benefits, but it's not a powerhouse active.

Irritation

low

Source

natural

beautyskincarehumectant
Read ingredient review

Humectant

Bis-Aminopropyl Diglycol

BIS-AMINOPROPYL DIGLYCOL

3.8

A gentle synthetic humectant that helps skin retain moisture and improves the texture of skincare formulas.

Irritation

low

Source

synthetic

beautyskincarehumectant
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Humectant

Black Bamboo Juice

Phyllostachys Nigra Juice

4.0

A gentle, water-like ingredient that adds light hydration and antioxidant protection, ideal for sensitive or dehydrated skin.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Black Cherry Juice

Prunus Serotina Juice

4.0

Black Cherry Juice is a gentle, hydrating ingredient that also provides antioxidant benefits, making it a nice addition to soothing and moisturizing formulas.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Black Strap Powder

Saccharum officinarum (Sugar Cane) Extract

3.8

Black Strap Powder is a natural sugar cane derivative that hydrates and gently exfoliates, but its high sugar content may not suit all skin types.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Bladderwrack Extract

Fucus Vesiculosus Extract

4.0

A gentle seaweed extract that hydrates and soothes skin, but its benefits are mostly anecdotal and backed by limited clinical research.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Borojoa Patinoi Fruit Juice

Borojoa Patinoi Fruit Juice

3.8

A gentle, hydrating fruit juice with antioxidant potential, but research on its skincare benefits is still limited.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Brown Seaweed Powder

NEMACYSTUS DECIPIENS POWDER

4.0

A gentle, hydrating seaweed powder that helps skin retain moisture and may soothe irritation.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Bull Kelp Extract

Nereocystis luetkeana extract

4.0

A mineral-rich seaweed extract that hydrates and soothes skin, generally safe for most skin types.

Irritation

low

Source

natural

beautyskincarehumectantsoothing
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Humectant

Butyl Laevulinate

Butyl Laevulinate

4.0

Butyl Laevulinate is a gentle, plant-derived ester that hydrates and lightly exfoliates, making it a good option for sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
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