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

Antioxidant

Alnus Firmifolia Fruit Extract

Alnus Firmifolia Fruit Extract

3.8

A gentle antioxidant extract from alder fruit that may help protect skin from environmental stress, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Soothing Agent

Aloe Arborescens Leaf Powder

Aloe Arborescens Leaf Powder

4.0

A gentle, plant-based powder that soothes and hydrates skin, similar to Aloe vera but with a slightly different nutrient profile.

Irritation

low

Source

natural

beautyskincaresoothing
Read ingredient review

Soothing Agent

Aloe Callus Culture Extract

Aloe Barbadensis Callus Culture Extract

4.3

A sustainable, lab-grown aloe extract that soothes skin and fights free radicals without the variability of traditional aloe.

Irritation

low

Source

biotech

beautyskincaresoothing
Read ingredient review

Antioxidant

Aloe Callus Extract

Aloe Barbadensis Callus Extract

4.0

A lab-grown aloe extract that offers concentrated antioxidants and soothing benefits with minimal irritation risk.

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review

Soothing Agent

Aloe Callus Powder

Aloe Barbadensis Callus Powder

4.0

A gentle, plant-based powder that soothes and protects skin, but its benefits are less studied than traditional aloe leaf juice.

Irritation

low

Source

natural

beautyskincaresoothing
Read ingredient review

Soothing Agent

Aloe Ferment Filtrate

LACTOBACILLUS/ALOE BARBADENSIS FERMENT FILTRATE

4.0

A gentle, probiotic-fermented aloe ingredient that soothes and conditions skin without irritation.

Irritation

low

Source

biotech

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Aloe Fermented Pine Extract

Aloe Arborescens Leaf Extract, Pinus Densiflora Leaf Extract, Saccharomyces Ferment

3.8

A gentle fermented botanical blend that may help calm skin and provide antioxidant support, though research is limited.

Irritation

low

Source

natural

beautyskincareantioxidantsoothing
Read ingredient review

Humectant

Aloe Ferox Leaf Juice

Aloe Ferox Leaf Juice

4.0

Aloe Ferox Leaf Juice is a gentle, hydrating ingredient that soothes and moisturizes skin, with a slightly richer nutrient profile than common Aloe Vera.

Irritation

low

Source

natural

beautyskincarehumectant
Read ingredient review

Soothing Agent

Aloe Ferox Leaf Juice Extract

Aloe Ferox Leaf Juice Extract

4.0

A soothing, hydrating botanical extract with antioxidant benefits, generally safe and well-tolerated for most skin types.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Aloe Ferox Leaf Juice Powder

Aloe Ferox Leaf Juice Powder

4.0

A gentle, plant-derived powder that helps calm and hydrate skin, but is less studied than its cousin Aloe barbadensis (common aloe vera).

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Aloe Maculata Leaf Extract

Aloe Maculata Leaf Extract

3.8

Aloe Maculata Leaf Extract is a gentle, soothing botanical that helps calm irritated skin and provides light hydration, but it is less researched than classic Aloe vera.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Aloe Phytoplacenta Extract

Aloe Barbadensis Phytoplacenta Extract

4.0

A gentle, plant-derived ingredient that may help calm irritation and support skin's natural repair processes, though human studies are limited.

Irritation

low

Source

natural

beautyskincaresoothing
Read ingredient review

Humectant

Aloe Polysaccharides

Aloe Barbadensis Leaf Polysaccharides

4.3

Aloe polysaccharides are gentle, hydrating molecules that help calm irritation and support the skin's moisture barrier.

Irritation

low

Source

natural

beautyskincarehumectant
Read ingredient review

Soothing Agent

Aloe Resin Extract

Aloe Species Resin

3.8

Aloe resin is a natural, soothing ingredient that may help calm irritated skin, but research on its specific benefits is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Aloe Sprout Extract

Aloe Barbadensis Sprout Extract

4.0

Aloe sprout extract is a gentle, antioxidant-rich ingredient that hydrates and soothes skin, but research on its specific benefits is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing
Read ingredient review

Soothing Agent

Aloe Vera

Aloe Barbadensis Leaf Juice

4.5

Aloe vera is a gentle, hydrating ingredient that can help calm irritated skin, but its benefits are often overstated in marketing.

Irritation

low

Source

natural

beautyskincaresoothing
Read ingredient review

Soothing Agent

Aloe Vera Callus Extract

Aloe Barbadensis Callus Extract

4.0

A gentle, lab-grown aloe extract that soothes and hydrates without the variability of traditional aloe.

Irritation

low

Source

biotech

beautyskincaresoothing
Read ingredient review

Humectant

Aloe Vera Leaf Extract

Aloe Barbadensis Leaf Extract

4.5

Aloe vera leaf extract is a gentle, water-based humectant that hydrates and soothes the skin, making it a staple in calming and moisturizing products.

Irritation

low

Source

natural

beautyskincarehumectant
Read ingredient review

Soothing Agent

Aloe Vera Leaf Juice Powder

Aloe Barbadensis Leaf Juice Powder

4.5

A gentle, water-soluble powder that soothes and hydrates skin, ideal for sensitive or irritated complexions.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing agent

Aloe Vera Leaf Powder

Aloe Barbadensis Leaf Powder

4.0

A gentle, plant-based powder that soothes and hydrates skin, but its benefits depend heavily on processing and formulation.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Skin brightener

Aloesin

ALOESIN

4.0

Aloesin is a gentle, plant-derived brightener that can help fade dark spots without the irritation of stronger alternatives.

Irritation

low

Source

natural

beautyskincarebrightening
Read ingredient review

Exfoliant

Alpha Hydroxy Acid (AHA) Blend

Alpha-Hydroxy Acids

4.2

Alpha hydroxy acids are effective exfoliants that smooth skin texture and boost radiance, but require careful use to avoid irritation.

Irritation

moderate

Source

natural

beautyskincareexfoliant
Read ingredient review

Skin lightening agent

Alpha-Arbutin

Alpha-Arbutin

4.3

Alpha-arbutin is a well-tolerated, plant-based brightener that gently fades dark spots without the irritation of stronger alternatives.

Irritation

low

Source

natural

beautyskincarebrightening
Read ingredient review

Antioxidant

Alpha-Camphorene

A-CAMPHORENE

3.5

Alpha-Camphorene is a plant-derived antioxidant with emerging research, but its use in skincare is limited and may pose a moderate irritation risk for sensitive skin.

Irritation

moderate

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance Component

Alpha-Cedrene

ALPHA-CEDRENE

3.5

Alpha-Cedrene is a natural fragrance ingredient from cedarwood with early research suggesting antioxidant and soothing benefits, but it's primarily used for scent.

Irritation

low

Source

natural

beautyskincarefragrance
Read ingredient review

Fragrance

Alpha-Damascone

ALPHA-DAMASCONE

3.5

Alpha-Damascone is a synthetic fragrance ingredient that adds a rose-like scent to products but may cause irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Alpha-Ethoxyphenetole

ALPHA-ETHOXYPHENETOLE

3.5

Alpha-Ethoxyphenetole is a synthetic fragrance ingredient with limited published safety data, but it is generally considered safe at the low levels used in cosmetics.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Humectant

Alpha-Glucan

Alpha-Glucan

4.0

Alpha-glucan is a gentle, sugar-derived humectant that hydrates skin and supports a healthy microbiome without irritation.

Irritation

low

Source

natural

beautyskincarehumectantprebiotic
Read ingredient review

Fragrance

Alpha-Ionone

Alpha-Ionone

3.5

Alpha-Ionone adds a floral violet scent to products but can be a skin sensitizer for some individuals.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Alpha-Ionyl Acetate

ALPHA-IONYL ACETATE

3.5

Alpha-Ionyl Acetate is a synthetic fragrance ingredient that adds a pleasant scent to products but offers no skincare benefits and may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Alpha-Isomethyl Ionone

Alpha-Isomethyl Ionone

3.5

A common synthetic floral scent that is generally safe but may trigger allergies in sensitive individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Alpha-Methyl Beta-Ionone

ALPHA-METHYL-BETA-IONONE

3.5

A synthetic scent ingredient that gives a floral violet note, but may cause skin irritation in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Alpha-Methyldecanenitrile

ALPHA-METHYLDECANENITRILE

3.8

A synthetic scent ingredient that adds a fresh, citrusy note but offers no skincare benefit beyond fragrance.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance

Alpha-Phellandrene

ALPHA-PHELLANDRENE

3.5

Alpha-phellandrene is a fragrant plant compound with some antioxidant potential, but its main role in skincare is as a scent ingredient, and it may cause irritation in sensitive individuals.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Fragrance

Alpha-Pinanol

ALPHA-PINANOL

3.5

Alpha-Pinanol is a natural fragrance ingredient with mild antimicrobial properties, but it may cause irritation in sensitive skin at higher concentrations.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Antioxidant

Alpha-Pinene

PINENE

3.8

Alpha-pinene is a plant-derived antioxidant that can help protect skin from environmental stress, but it may cause irritation in sensitive individuals, especially at higher concentrations.

Irritation

moderate

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Alpha-Santalol

ALPHA-SANTALOL

4.0

Alpha-santalol is the primary fragrant component of sandalwood oil, offering a subtle woody scent and potential soothing benefits, but it must be used at low concentrations to minimize the risk of skin irritation.

Irritation

low

Source

natural

beautyskincarefragrancesoothing agent
Read ingredient review

Emollient

Alpha-Santalyl Butyrate

Alpha-Santalyl Butyrate

3.8

Alpha-Santalyl Butyrate is a gentle synthetic emollient and fragrance ingredient that softens skin and adds a subtle sandalwood-like scent, but it has limited research on long-term benefits.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Fragrance

Alpha-Terpinene

ALPHA-TERPINENE

3.5

Alpha-Terpinene is a fragrant plant compound with antioxidant benefits, but it can be irritating for sensitive skin and is best used in low concentrations.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Fragrance

Alpha-Terpinyl Acetate

TERPINYL ACETATE

3.5

Alpha-Terpinyl Acetate is a natural fragrance compound that adds a pleasant scent to products but may cause irritation in sensitive individuals.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Antioxidant

Alpine Calamint Extract

ACINOS ALPINUS EXTRACT

3.5

A gentle plant extract with antioxidant potential, but research is limited and benefits are not well-established in human skin.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Alpine Clematis Callus Extract

Clematis Alpina Callus Extract

3.8

A gentle plant stem cell extract with antioxidant potential, but research on its specific benefits for skin is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Alpine Clematis Callus Powder

Clematis Alpina Callus Powder

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Alpine Eryngo Flower Extract

Eryngium Alpinum Flower Extract

3.8

A gentle botanical extract that may help calm skin and provide antioxidant protection, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Alpine Flax Extract

Linum Alpinum Flower/Leaf/Stem Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Soothing Agent

Alpine Holy Grass Extract

HIEROCHLOE ALPINA HERB EXTRACT

3.5

A gentle, fragrant plant extract with potential antioxidant and soothing benefits, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Alpine Holy Grass Oil

HIEROCHLOE ALPINA HERB OIL

3.5

Alpine Holy Grass Oil adds a natural, sweet scent to products and may offer mild soothing benefits, but research is limited.

Irritation

low

Source

natural

beautyskincarefragrance
Read ingredient review

Antioxidant

Alpine Lady's Mantle Extract

ALCHEMILLA ALPINA EXTRACT

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Alpine Skullcap Extract

SCUTELLARIA ALPINA FLOWER/LEAF/STEM EXTRACT

4.0

A gentle botanical extract that helps protect skin from environmental stress and may calm irritation, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Alpine Snowbell Extract

Soldanella Alpina Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Alpinia Calcarata Extract

Alpinia Calcarata Rhizome/Root Extract

3.8

A gentle botanical extract from the ginger family that may help calm skin and fight free radical damage, though research is still early.

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Fragrance

Alpinia Formosana Leaf Oil

ALPINIA FORMOSANA LEAF OIL

3.8

A fragrant leaf oil from the ginger family that adds a pleasant scent to products, but with limited research on skin benefits and potential for irritation in sensitive individuals.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Antioxidant

Alpinia Formosana Leaf/Stem Powder

ALPINIA FORMOSANA LEAF/STEM POWDER

3.5

A gentle botanical powder from the ginger family that may offer antioxidant and soothing benefits, but research is still early and its effects in skincare are not yet well-established.

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review

Soothing Agent

Alpinia Formosana Leaf/Stem Water

ALPINIA FORMOSANA LEAF/STEM WATER

3.8

A gentle, plant-derived water that may help calm skin and provide antioxidant benefits, though research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing
Read ingredient review

Antioxidant

Alpinia Formosana Seed Powder

Alpinia Formosana Seed Powder

3.5

A gentle botanical seed powder with antioxidant potential, but research is limited and it's mostly used as a mild physical exfoliant.

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review

Humectant

Alpinia Formosana Seed Water

Alpinia Formosana Seed Water

3.8

A gentle, plant-derived water that offers light hydration and potential soothing benefits, but research is still emerging.

Irritation

low

Source

natural

beautyskincarehumectant
Read ingredient review

Soothing Agent

Alpinia Intermedia Leaf/Stem Water

Alpinia Intermedia Leaf/Stem Water

3.8

A mild, water-based botanical extract that may offer soothing and antioxidant benefits, but research on this specific species is limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Exfoliant

Alpinia Intermedia Seed Powder

Alpinia Intermedia Seed Powder

3.5

A gentle, natural powdered exfoliant with antioxidant potential, but research is limited and it may not suit very sensitive skin.

Irritation

low

Source

natural

beautyskincareexfoliant
Read ingredient review