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

Emollient

Hexyldecyl Octadecanol

HEXYLDECYLOCTADECANOL

4.0

A gentle, non-greasy emollient that helps soften skin and improve product texture without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Hexyldecyl Oleate

HEXYLDECYL OLEATE

4.0

Hexyldecyl Oleate is a lightweight, non-greasy emollient that softens skin and improves product spreadability with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Hexyldecyl Palmitate

Hexyldecyl Palmitate

4.0

A lightweight, non-greasy emollient that helps skin feel soft and smooth without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Hexyldecyl Stearate

HEXYLDECYL STEARATE

4.0

Hexyldecyl Stearate is a gentle, non-greasy emollient that helps moisturize and improve the feel of skincare products without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Fragrance Ingredient

Hexyldihydrofuranone

HEXYLDIHYDROFURANONE

3.5

A synthetic fragrance compound that adds a pleasant scent but offers no skincare benefit; safe at low concentrations but may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
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Skin brightening agent

Hexyldioxodecyl Methyl Tyrosinate

Hexyldioxodecyl Methyl Tyrosinate

3.8

A synthetic brightening ingredient that works by slowing melanin production, but research is still emerging compared to more established alternatives.

Irritation

low

Source

synthetic

beautyskincarebrightening
Read ingredient review

Emollient

Hexyldodecyl Salicylate

Hexyldodecyl Salicylate

4.0

A gentle emollient that helps soften skin and improve product texture, with low irritation potential.

Irritation

low

Source

synthetic

beautyskincareemollient
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Humectant

Hexylene Glycol

Hexylene Glycol

4.0

Hexylene glycol is a safe, effective humectant and solvent that helps products feel lightweight and absorb well, but it can cause mild irritation in very sensitive skin.

Irritation

low

Source

synthetic

beautyskincarehumectant
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Film Former

Hexylene Glycol Copolymer

HEXYLENE GLYCOL/NEOPENTYL GLYCOL/ADIPIC ACID/SMDI/DMPA COPOLYMER

3.8

A synthetic film-former that helps makeup and skincare last longer, but may feel heavy on some skin types.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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UV Filter

Hexylethylideneamino Benzoate

HEXYLETHYLIDENEAMINO-BENZOATE

3.5

A synthetic UV filter that helps protect skin from sun damage, but its use is limited by regional regulations and potential environmental concerns.

Irritation

low

Source

synthetic

beautyskincaresunscreen
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Preservative booster

Hexylglycerin

Hexylglycerin

4.2

Hexylglycerin is a gentle, multifunctional ingredient that boosts preservative effectiveness while providing light skin conditioning.

Irritation

low

Source

synthetic

beautyskincarepreservative booster
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Fragrance Ingredient

Hexylidene Cyclopentanone

2-HEXYLIDENECYCLOPENTANONE

3.5

A synthetic scent ingredient that adds fragrance but may cause irritation for sensitive skin types.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
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Fragrance Ingredient

Hexylidenecyclohexanone

2-HEXYLIDENECYCLOHEXAN-1-ONE

3.5

A synthetic fragrance ingredient that adds a pleasant floral-woody scent but offers no skincare benefits and may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Surfactant

Hexyloxodecanamide MEA

Hexyloxodecanamide MEA

3.5

Hexyloxodecanamide MEA is a synthetic surfactant that helps create rich lather in cleansers, but it may cause irritation for sensitive skin types.

Irritation

moderate

Source

synthetic

beautyskincarecleansing
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Fragrance Ingredient

Hexyloxy Dimethyltetrahydrofuran

HEXYLOXY DIMETHYLTETRAHYDROFURAN

3.5

A synthetic scent ingredient that adds a fresh, green note to products but offers no skincare benefits and may cause sensitivity in some people.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Antioxidant

Hexyloxy Trimethylphenol

Hexyloxy Trimethylphenol

4.0

A synthetic antioxidant that helps defend skin against environmental damage, but research is still emerging compared to more established antioxidants.

Irritation

low

Source

synthetic

beautyskincareantioxidant
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Fragrance Ingredient

Hexyloxyacetaldehyde Dimethyl Acetal

HEXYLOXYACETALDEHYDE DIMETHYL ACETAL

3.5

A synthetic fragrance ingredient that adds a fresh, green scent to products but may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Solvent

Hexyloxyethanol

Hexyloxyethanol

3.5

Hexyloxyethanol is a synthetic solvent that helps other ingredients dissolve and boosts preservative effectiveness, but it may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresolvent
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Skin brightener

Hexylresorcinol

Hexylresorcinol

4.0

Hexylresorcinol is a gentle, effective skin brightener that works by slowing melanin production and fighting oxidative stress, making it a good alternative to stronger brighteners like hydroquinone.

Irritation

low

Source

synthetic

beautyskincarebrightening agent
Read ingredient review

Film Former

Hexyltrimethoxysilane

Hexyltrimethoxysilane

3.8

A synthetic silicone that helps products spread smoothly and resist water, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarefilm former
Read ingredient review

Antioxidant

Hiba Wood Extract

Thujopsis Dolabrata Wood Extract

3.8

A gentle, plant-based antioxidant extract that may help calm skin and defend against environmental stressors, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Hiba Wood Leaf Extract

Thujopsis Dolabrata Leaf Extract

3.8

A gentle botanical extract with antioxidant potential, though human studies are limited and it's best known for traditional use.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antimicrobial

Hiba Wood Oil

Thujopsis Dolabrata Wood Oil

3.8

Hiba wood oil is a natural essential oil with promising antimicrobial and antioxidant benefits, but its strong scent and potential for skin irritation mean it's best used in low concentrations and patch-tested first.

Irritation

moderate

Source

natural

beautyskincareessential oil
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Antioxidant

Hiba Wood Water

THUJOPSIS DOLABRATA WATER

3.8

A gentle, aromatic water from Hiba wood that may help calm skin and provide mild antioxidant benefits, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Firming agent

Hibiscolide

Hibiscolide

3.8

Hibiscolide is a plant-derived active that may help improve skin firmness and reduce fine lines, but research is still early.

Irritation

low

Source

natural

beautyskincareactive
Read ingredient review

Antioxidant

Hibiscus Abelmoschus Extract

Hibiscus Abelmoschus Extract

4.0

A gentle botanical extract that may help calm skin and provide antioxidant support, but research is still early.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Emollient

Hibiscus Abelmoschus Seed Oil

Hibiscus Abelmoschus Seed Oil

4.0

A gentle, naturally scented oil that hydrates and softens skin without clogging pores, ideal for sensitive and dry skin types.

Irritation

low

Source

natural

beautyskincareemollient
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Antioxidant

Hibiscus Callus Culture Extract

Hibiscus Syriacus Callus Culture Extract

4.0

A gentle, lab-grown plant extract that may help protect skin from environmental stress and support a more even tone, though human studies are limited.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Hibiscus Callus Extract

Hibiscus Syriacus Callus Extract

3.8

A gentle plant extract with antioxidant potential, but research is still early — it's not a proven powerhouse yet.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Hibiscus Callus Ferment Filtrate

LACTOBACILLUS/HIBISCUS SABDARIFFA CALLUS CULTURE FERMENT FILTRATE

4.0

A gentle, antioxidant-rich fermented ingredient that may help soothe and protect skin, though human studies are still limited.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Hibiscus Callus Powder

Hibiscus Syriacus Callus Powder

3.8

A gentle, plant-derived antioxidant that may help calm and protect skin, but research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Exfoliant

Hibiscus Ferment Filtrate

RHIZOPUS/HIBISCUS SABDARIFFA FLOWER FERMENT FILTRATE

3.8

A gentle fermented hibiscus ingredient that may offer mild exfoliation and antioxidant benefits, but research is still limited.

Irritation

low

Source

biotech

beautyskincareexfoliant
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Antioxidant

Hibiscus Flower & Leaf Extract

Hibiscus Rosa-Sinensis Flower/Leaf Extract

4.0

A gentle, antioxidant-rich botanical extract that offers mild exfoliation and hydration, suitable for most skin types.

Irritation

low

Source

natural

beautyskincareantioxidant
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Skin Conditioning

Hibiscus Flower and Seed Water

Hibiscus Abelmoschus Flower/Seed Water

3.8

A gentle, hydrating botanical water that adds a touch of antioxidant protection and a pleasant natural scent to skincare products.

Irritation

low

Source

natural

beautyskincarebotanical
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Exfoliant

Hibiscus Flower Extract

Hibiscus Sabdariffa Flower Extract

4.0

A gentle plant-based exfoliant and antioxidant that can help brighten skin and support a smoother texture without harsh scrubbing.

Irritation

low

Source

natural

beautyskincareantioxidant
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Exfoliant

Hibiscus Flower Powder

HIBISCUS SABDARIFFA FLOWER POWDER

4.0

A gentle, natural exfoliant that also provides antioxidant benefits, but may not suit very sensitive skin due to its physical texture.

Irritation

low

Source

natural

beautyskincareexfoliant
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Astringent

Hibiscus Flower Water

Hibiscus Sabdariffa Flower Water

3.8

A gentle, naturally astringent floral water that may help tighten pores and refresh skin, but lacks strong clinical evidence for most claims.

Irritation

low

Source

natural

beautyskincareastringent
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Antioxidant

Hibiscus Hamabo Extract

Hibiscus Hamabo Extract

3.8

A gentle plant extract with antioxidant potential, best for calming sensitive skin and providing light environmental protection.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Hibiscus Leaf Cell Extract

HIBISCUS ROSA-SINENSIS LEAF CELL EXTRACT

4.0

A gentle, plant-based antioxidant that helps protect skin from environmental stress without irritation.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Hibiscus Mutabilis Flower Extract

Hibiscus Mutabilis Flower Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Exfoliant

Hibiscus Stem Powder

Hibiscus Cannabinus Stem Powder

3.8

A natural, gentle exfoliating powder from the hibiscus plant stem, ideal for physical scrubs without harsh microbeads.

Irritation

low

Source

natural

beautyskincareexfoliant
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Humectant

Hibiscus Stem Water

Hibiscus Cannabinus Stem Water

3.8

A gentle, plant-derived water that provides light hydration and antioxidant benefits, but research on its specific skincare effects is still limited.

Irritation

low

Source

natural

beautyskincarehumectant
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Antioxidant

Hibiscus Syriacus Bark Extract

Hibiscus Syriacus Bark Extract

3.8

A gentle botanical extract with antioxidant potential, though research on its specific skin benefits is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Hibiscus Syriacus Seed Extract

Hibiscus Syriacus Seed Extract

3.8

A gentle, antioxidant-rich plant extract that may help protect skin from environmental stress, though human studies are limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Emollient

High Oleic Sunflower Oil

HELIANTHUS ANNUUS HYBRID OIL

4.5

A non-greasy, stable plant oil that hydrates and supports the skin barrier without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Antioxidant

Hijiki Callus Culture Extract

Hizikia Fusiformis Callus Culture Extract

3.8

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

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review

Soothing agent

Himalayan Balsam Flower Extract

IMPATIENS GLANDULIFERA FLOWER EXTRACT

3.5

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

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Himalayan Botanical Blend

THYMUS LINEARIS LEAF/(ANGELICA GLAUCA/BERGENIA CILIATA) ROOT/PRINSEPIA UTILIS SEED EXTRACT

3.8

A blend of Himalayan plants that may offer antioxidant and soothing benefits, but research is limited and mostly traditional.

Irritation

low

Source

natural

beautyskincareantioxidant
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Fragrance

Himalayan Fir Oil

Abies spectabilis branch/leaf oil

3.8

A fragrant essential oil with a fresh, woody scent that may offer soothing benefits but can be irritating for sensitive skin.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Humectant

Himanthalia Elongata Powder

Himanthalia Elongata Powder

4.0

A nutrient-rich brown seaweed powder that hydrates and soothes skin with antioxidants and minerals.

Irritation

low

Source

natural

beautyskincarehumectantantioxidant
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Antioxidant

Hinoki Cypress Extract

CHAMAECYPARIS OBTUSA LEAF/ROOT EXTRACT

4.0

A gentle botanical extract from hinoki cypress that may help calm skin and fight environmental stress.

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing Agent

Hinoki Cypress Water

Chamaecyparis Obtusa Water

4.0

A gentle, aromatic water from the Hinoki cypress tree that may help soothe skin and provide a calming sensory experience, though research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Antimicrobial

Hinokitiol

Hinokitiol

4.0

A gentle, plant-derived antimicrobial that helps preserve formulas and may support acne-prone or sensitive skin without harsh side effects.

Irritation

low

Source

natural

beautyskincarepreservative
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Exfoliant

Hippuric Acid

HIPPURIC ACID

3.5

Hippuric acid is a gentle, naturally derived exfoliant with antioxidant potential, but research on its cosmetic benefits is still limited compared to more established acids.

Irritation

low

Source

natural

beautyskincareexfoliant
Read ingredient review