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

Emollient

Hydrogenated Tallow Acid

Hydrogenated Tallow Acid

3.5

A thick, emollient fatty acid from animal fat that helps create rich creams and balms, but may clog pores for some skin types.

Irritation

low

Source

natural

beautyskincareemollient
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Emulsifier

Hydrogenated Tallow Amide

Hydrogenated Tallow Amide

3.5

A thickener and stabilizer from hydrogenated tallow, effective but may be too heavy for oily or acne-prone skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
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Surfactant

Hydrogenated Tallow Betaine

Hydrogenated Tallow Betaine

4.0

A mild, animal-derived surfactant that cleans effectively without over-drying, suitable for sensitive skin.

Irritation

low

Source

natural

beautyskincaresurfactant
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Emollient

Hydrogenated Tallow Glyceride Citrate

Hydrogenated Tallow Glyceride Citrate

3.8

A gentle, semi-synthetic emollient that softens skin and improves product texture, but its animal-derived origin may not suit all preferences.

Irritation

low

Source

semi-synthetic

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Viscosity Controlling Agent

Hydrogenated Tallowalkonium Bentonite

Hydrogenated Tallowalkonium Bentonite

3.5

A safe, effective thickener for makeup and creams, but its animal-derived origin may not suit everyone.

Irritation

low

Source

semi-synthetic

beautyskincareviscosity controlling agent
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Conditioning Agent

Hydrogenated Tallowalkonium Chloride

Hydrogenated Tallowalkonium Chloride

3.5

A conditioning ingredient derived from animal fats that softens hair and reduces static, but may cause irritation or clog pores in sensitive individuals.

Irritation

moderate

Source

semi-synthetic

beautyskincarehaircareconditioning agent
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Surfactant

Hydrogenated Tallowamide DEA

Hydrogenated Tallowamide DEA

3.5

A traditional foam booster and emulsifier that can be effective but may cause irritation or clog pores in sensitive or acne-prone skin.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
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Antistatic Agent

Hydrogenated Tallowamine

Hydrogenated Tallowamine

3.0

An effective hair conditioner and antistatic agent, but its animal origin and potential for irritation make it less common in modern clean beauty.

Irritation

moderate

Source

natural

beautyskincaresurfactant
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Surfactant

Hydrogenated Tallowamine Oxide

Hydrogenated Tallowamine Oxide

3.5

An effective foaming agent from animal-derived tallow, but may be too stripping for dry or sensitive skin.

Irritation

moderate

Source

semi-synthetic

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Emulsifier

Hydrogenated Talloweth-12

Hydrogenated Talloweth-12

3.5

An effective emulsifier that helps mix water and oils, but may be too heavy or potentially irritating for sensitive or acne-prone skin.

Irritation

moderate

Source

semi-synthetic

beautyskincareemulsifier
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Emulsifier

Hydrogenated Talloweth-25

Hydrogenated Talloweth-25

3.5

A gentle emulsifier that helps mix water and oil, but its animal-derived origin may not suit everyone.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
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Surfactant

Hydrogenated Tallowoyl Glutamic Acid

Hydrogenated Tallowoyl Glutamic Acid

4.0

A mild, soap-like cleanser that effectively removes dirt and oil without stripping the skin, making it a good choice for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agent
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Antistatic Agent

Hydrogenated Tallowtrimonium Chloride

Hydrogenated Tallowtrimonium Chloride

3.8

A conditioning agent derived from tallow that softens hair and reduces static, but may be too heavy for fine hair or acne-prone skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarehaircare
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Emollient

Hydrogenated Tamanu Oil

Hydrogenated Calophyllum Inophyllum Seed Oil

4.0

Hydrogenated tamanu oil is a stable, non-greasy emollient that helps soften and soothe the skin without the strong scent or staining of raw tamanu oil.

Irritation

low

Source

semi-synthetic

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Emollient

Hydrogenated Tridodecene

HYDROGENATED TRIDODECENE

4.0

A lightweight, non-greasy synthetic emollient that helps products glide on smoothly without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Hydrogenated Vegetable Oil

Hydrogenated Vegetable Oil

4.0

A safe, plant-derived thickener and emollient that helps lock in moisture but may clog pores for some skin types.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Emollient

Hydrogenated Walnut Seed Oil

Hydrogenated Juglans Regia (Walnut) Seed Oil

3.8

A hydrogenated nut oil that adds richness and slip to formulas, but may be comedogenic for some and is unsuitable for nut-allergic individuals.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Antioxidant

Hydrolyzed Acai Fruit

Hydrolyzed Euterpe Oleracea Fruit

4.0

Hydrolyzed Acai Fruit is a gentle antioxidant and hydrating ingredient that helps protect skin from environmental stress while supporting a healthy-looking complexion.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Hydrolyzed Acerola Fruit

Hydrolyzed Acerola Fruit

4.0

A gentle, vitamin C-rich fruit extract that helps brighten skin and fight free radical damage without the irritation of pure ascorbic acid.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Agave Stem Extract

HYDROLYZED AGAVE TEQUILANA STEM EXTRACT

3.8

A gentle, plant-derived humectant that helps attract moisture to the skin, but research on its specific benefits is still limited compared to more established ingredients.

Irritation

low

Source

natural

beautyskincarehumectant
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Soothing Agent

Hydrolyzed Agave Yeast Extract

Hydrolyzed Metschnikowia Agaves Extract

3.8

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

Irritation

low

Source

biotech

beautyskincaresoothing agent
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Film-Forming Agent

Hydrolyzed Albumen

Hydrolyzed Albumen

3.8

Hydrolyzed albumen is a gentle protein that helps strengthen hair and temporarily smooth skin by forming a light film.

Irritation

low

Source

natural

beautyskincarefilm-forming
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Antioxidant

Hydrolyzed Alder Extract

Hydrolyzed Alnus Japonica Stem Extract

4.0

A gentle plant extract with antioxidant and soothing potential, though human studies are limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Algae Extract

Hydrolyzed Algae Extract

4.0

A gentle, hydrating ingredient from algae that plumps skin and supports its moisture barrier without irritation.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Hydrolyzed Algin

Hydrolyzed Algin

4.0

A gentle, seaweed-derived humectant that helps skin hold onto moisture and leaves a light, smoothing film.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Hydrolyzed Aloe Leaf

Hydrolyzed Aloe Barbadensis Leaf Extract

4.0

A gentle, processed aloe ingredient that hydrates and calms skin with low irritation risk.

Irritation

low

Source

natural

beautyskincaresoothing
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Humectant

Hydrolyzed Aloe Leaf Extract

Hydrolyzed Aloe Barbadensis Leaf Extract

4.0

A gentle, water-soluble aloe derivative that hydrates and calms skin, ideal for sensitive or irritated complexions.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Humectant

Hydrolyzed Aloe Leaf Juice

Hydrolyzed Aloe Barbadensis Leaf Juice

4.3

A gentle, water-loving ingredient that hydrates and soothes skin, especially good for sensitive or irritated types.

Irritation

low

Source

natural

beautyskincarehumectant
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Antioxidant

Hydrolyzed Alpinia Zerumbet

Hydrolyzed Alpinia Zerumbet

4.0

A gentle, plant-derived antioxidant that helps calm skin and fight free radical damage, ideal for sensitive and aging skin.

Irritation

low

Source

natural

beautyskincareantioxidant
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Skin conditioning agent

Hydrolyzed Antler Velvet

Hydrolyzed Antler Velvet

3.5

Hydrolyzed Antler Velvet is a novel protein ingredient that may help hydrate and condition skin, but scientific evidence for anti-aging benefits is very limited.

Irritation

low

Source

natural

beautyskincareconditioning agent
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Skin conditioning agent

Hydrolyzed Antler Velvet Extract

Hydrolyzed Antler Velvet Extract

3.5

A novel, protein-rich ingredient with promising anti-aging potential, but human studies are limited and ethical sourcing is a concern.

Irritation

low

Source

natural

beautyskincareanti-aging
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Antioxidant

Hydrolyzed Arthrospira Extract

Hydrolyzed Arthrospira Extract

4.0

A gentle, algae-derived ingredient that provides antioxidant protection and light hydration, but its benefits are best supported by general spirulina research rather than specific cosmetic studies.

Irritation

low

Source

natural

beautyskincareantioxidant
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Hair conditioning agent

Hydrolyzed Avocado Protein

Hydrolyzed Avocado 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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Antioxidant

Hydrolyzed Bamboo Extract

Hydrolyzed Sasa Veitchii Extract

4.0

A gentle bamboo-derived extract that helps calm skin and defend against environmental stress, ideal for sensitive or reactive skin types.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Banana Fruit

Hydrolyzed Banana Fruit

3.8

A gentle, plant-derived humectant that helps hydrate and calm the skin, though research on its specific benefits is still limited.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Hydrolyzed Baobab Extract

Hydrolyzed Adansonia Digitata Extract

4.0

A gentle, plant-derived humectant that helps hydrate and condition the skin, though research on its specific benefits is still limited.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Hydrolyzed Baobab Seed Extract

Hydrolyzed Adansonia Digitata Seed Extract

4.0

A gentle, plant-derived humectant that helps hydrate and calm the skin, with early research suggesting antioxidant benefits.

Irritation

low

Source

natural

beautyskincarehumectantsoothing agent
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Humectant

Hydrolyzed Bee Larva/Pupa Extract

HYDROLYZED BEE LARVA/PUPA EXTRACT

3.8

A novel protein extract from bee larvae that may help hydrate and condition skin, but research is limited and it's not suitable for vegans or those with bee allergies.

Irritation

low

Source

natural

beautyskincarehumectant
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Humectant

Hydrolyzed Beeswax

Hydrolyzed Beeswax

4.0

A gentle, water-soluble beeswax derivative that hydrates and helps maintain the skin barrier without the heavy feel of regular beeswax.

Irritation

low

Source

natural

beautyskincareemollient
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Antioxidant

Hydrolyzed Bilberry Leaf Extract

Hydrolyzed Vaccinium Myrtillus Leaf Extract

3.8

A gentle antioxidant extract from bilberry leaves that may help protect skin from environmental stress, though human studies are limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Hydrolyzed Bladderwrack Extract

Hydrolyzed Fucus Vesiculosus Extract

4.0

A gentle seaweed extract that helps hydrate and calm the skin, with antioxidant benefits from its natural compounds.

Irritation

low

Source

natural

beautyskincarehumectant
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