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

Film Former

Polyvinyl Butyral

POLYVINYL BUTYRAL

3.5

A synthetic film-former that helps makeup and hair products resist water and last longer, but it's not a skincare active.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Polyvinyl Chloride

POLYVINYL CHLORIDE

1.5

Polyvinyl Chloride is a synthetic plastic that is not a typical skincare ingredient; it is rarely used in modern cosmetics and is best avoided due to potential impurities and environmental concerns.

Irritation

moderate

Source

synthetic

beautyskincarefilm former
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Film Former

Polyvinyl Imidazolinium Acetate

Polyvinyl Imidazolinium Acetate

3.5

A synthetic film former that helps products spread evenly and hold their shape, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarehaircare
Read ingredient review

Film Former

Polyvinyl Isobutyl Ether

POLYVINYL ISOBUTYL ETHER

3.5

A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefit.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Polyvinyl Laurate

POLYVINYL LAURATE

3.8

A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Polyvinyl Stearyl Ether

POLYVINYL STEARYL ETHER

3.8

A synthetic film-former that helps products stay put and feel smooth, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Polyvinylacetamide

POLYVINYLACETAMIDE

3.5

A synthetic film-former that helps products spread smoothly and feel lightweight on skin.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Polyvinylcaprolactam

Polyvinylcaprolactam

3.8

A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefits.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film-Former

Polyvinylformamide

POLYVINYLFORMAMIDE

3.5

A synthetic film-former that helps create peel-off masks and gives a smooth, tight feel on skin.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Film Former

Polyvinylidene Difluoride

Polyvinylidene Difluoride

2.5

A synthetic film-former used for water resistance and durability, not a beneficial skincare active.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Antioxidant

Pomegranate Callus Culture Extract

Punica Granatum Callus Culture Extract

4.0

A gentle, lab-grown antioxidant that may help protect skin from environmental stress, though human studies are still limited.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Pomegranate Cell Culture Lysate

Punica Granatum Seed Cell Culture Lysate

4.0

A lab-grown pomegranate extract that may help protect skin from environmental stress, though human studies are still limited.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Pomegranate Ferment Extract

LACTOBACILLUS/PUNICA GRANATUM FRUIT FERMENT EXTRACT

4.0

A gentle, antioxidant-rich ferment that supports skin radiance and barrier health without common irritants.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Pomegranate Ferment Filtrate

SACCHAROMYCES/PUNICA GRANATUM FRUIT FERMENT FILTRATE

4.0

A gentle, antioxidant-rich ferment that supports skin radiance and hydration without common irritants.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Pomegranate Fruit/Root/Stem Powder

Punica Granatum Fruit/Root/Stem Powder

3.8

A gentle, antioxidant-rich botanical powder that may help soothe and protect skin, but its multi-part source means potency can vary.

Irritation

low

Source

natural

beautyskincareantioxidant
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Emollient

Pomegranate Glycerides

Punica Granatum Glycerides

4.0

A gentle, plant-derived emollient that helps soften and smooth skin without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Antioxidant

Pomegranate Leaf Cell Extract

Punica Granatum Leaf Cell Extract

4.0

A gentle, plant-based antioxidant that may help protect skin from environmental stress, though research on its topical benefits is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Pomegranate Peel Extract

POMEGRANATE FRUIT PEEL EXTRACT OCTENYLSUCCINATE

3.8

A gentle antioxidant from pomegranate peel, modified for better stability in formulas, but research on the modified form is limited.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
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Emollient

Pomegranate Seed Oil Esters

Punica Granatum Seed Oil Hydroxyphenethyl Esters

4.0

A stabilized, water-friendly version of pomegranate seed oil that offers antioxidant and moisturizing benefits with low irritation risk.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Exfoliant

Pomegranate Seed Powder

Punica Granatum Seed Powder

4.0

Pomegranate Seed Powder gently exfoliates while delivering antioxidants, but its texture can be gritty for sensitive skin.

Irritation

low

Source

natural

beautyskincareexfoliant
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Emollient

Pomegranate Stearyl Esters

Punica Granatum Seed Oil Stearyl Esters

4.0

A gentle, semi-synthetic emollient that helps soften skin without clogging pores, ideal for dry or sensitive skin types.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
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Antioxidant

Pomiferin

Pomiferin

4.0

Pomiferin is a plant-derived antioxidant that helps protect skin from environmental stress, though research on its cosmetic benefits is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Fragrance

Ponderosa Pine Oil

Pinus Ponderosa Branch/Leaf Oil

3.5

Ponderosa pine oil adds a fresh, woodsy scent to products but may irritate sensitive skin and has limited research on skincare benefits.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Antioxidant

Pongamia Fruit Extract

Pongamia Pinnata Fruit Extract

4.0

A gentle botanical extract that helps protect skin from environmental stress while calming irritation.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Pongamia Oil Extract

Pongamia Pinnata Seed Extract

3.8

A gentle plant extract that may help calm skin and fight free radical damage, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Soothing Agent

Pongamia Root Extract

Pongamia Glabra Root Extract

3.8

A gentle botanical extract with antioxidant and soothing potential, though research on its topical benefits is still limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Antioxidant

Poppy Callus Extract

PAPAVER RADICATUM CALLUS EXTRACT

3.8

A gentle, antioxidant-rich plant extract from Arctic poppy that may help calm skin and fight free radical damage, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing Agent

Poppy Flower Extract

PAPAVER RHOEAS FLOWER EXTRACT

3.8

A gentle, antioxidant-rich flower extract that may help calm irritated skin, but research on its specific benefits is still limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Soothing Agent

Poppy Flower Water

PAPAVER RHOEAS FLOWER WATER

3.8

A gentle floral water that may help calm sensitive skin, but its benefits are largely anecdotal and not backed by strong clinical research.

Irritation

low

Source

natural

beautyskincaresoothing
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Emollient

Poppy Seed

PAPAVER RHOEAS SEED

3.8

Poppy seed is a gentle, natural emollient with antioxidant properties, but research on its skincare benefits is still limited.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Poppy Seed Oil

PAPAVER SOMNIFERUM SEED OIL

4.0

Poppy seed oil is a gentle, non-greasy emollient rich in omega-6 fatty acids that helps soften and soothe dry skin without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Soothing agent

Populus Tremula Flower Extract

POPULUS TREMULA FLOWER EXTRACT

3.8

A gentle botanical extract from aspen flowers that may help calm skin and provide antioxidant support, though research is still emerging.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Skin conditioning agent

Porcine Cell Conditioned Media

Pig Dental Pulp Cell/Adipocyte/Bone Marrow Cell Conditioned Media

2.5

An experimental biotech ingredient from pig cells with limited human research and ethical concerns; not recommended for routine use.

Irritation

moderate

Source

biotech

beautyskincareactive
Read ingredient review

Conditioning Agent

Porcine Dental Pulp Cell Extract

Pig Dental Pulp Cell Conditioned Media

2.0

An unusual, animal-derived experimental ingredient with very limited safety and efficacy data for cosmetic use.

Irritation

moderate

Source

biotech

beautyskincareexperimental
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Anti-Aging Agent

Porcine Polypeptide-1

PORCINE POLYPEPTIDE-1

3.5

A peptide from porcine sources that may help support skin firmness, but research is limited and ethical concerns exist.

Irritation

low

Source

natural

beautyskincarepeptide
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Antioxidant

Porcini Mushroom Extract

Boletus Edulis Whole Plant Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing Agent

Poria Cocos Extract

PORIA COCOS SCLEROTIUM EXTRACT

4.0

A gentle, mushroom-derived extract that helps calm irritation and provides antioxidant protection, ideal for sensitive or stressed skin.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Absorbent

Poria Cocos Powder

PORIA COCOS POWDER

3.8

Poria Cocos Powder is a gentle, natural ingredient that can help absorb excess oil and soothe the skin, but its benefits are backed mostly by traditional use and limited modern research.

Irritation

low

Source

natural

beautyskincareabsorbent
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Emollient

Pork-Derived Ingredient Complex

Pork-Derived Ingredient Complex

3.5

Pork-derived ingredients like collagen and glycerin are effective moisturizers, but may not suit vegans or those with religious or ethical restrictions.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Pork-Derived Ingredients

Not applicable (varies by ingredient)

3.0

Pork-derived ingredients like collagen and elastin can provide moisturizing and film-forming benefits, but they are not suitable for vegans, vegetarians, or those with religious dietary restrictions.

Irritation

low

Source

natural

beautyskincareemollient
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Antioxidant

Porphobilinogen Lactam

PORPHOBILINOGEN LACTAM

2.5

An obscure synthetic compound with minimal cosmetic research; not recommended for routine skincare.

Irritation

low

Source

synthetic

beautyskincareantioxidant
Read ingredient review

UV Absorber

Porphyra 334

Porphyra 334

4.0

A promising natural UV filter from algae that also fights oxidative stress, but currently limited in standalone sunscreen use due to regulatory and formulation challenges.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

Porphyra Tenera Sporophyte Extract

PORPHYRA TENERA SPOROPHYTE EXTRACT

4.0

A gentle, hydrating seaweed extract with antioxidant potential, best for soothing and moisturizing sensitive or dry skin.

Irritation

low

Source

natural

beautyskincareantioxidanthumectant
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Humectant

Porphyra Yezoensis Powder

PORPHYRA YEZOENSIS POWDER

4.0

A gentle, nutrient-rich red algae powder that helps hydrate and protect the skin with antioxidant benefits.

Irritation

low

Source

natural

beautyskincarehumectantantioxidant
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Humectant

Porphyridium Cruentum Extract

PORPHYRIDIUM CRUENTUM EXTRACT

4.0

A gentle, hydrating microalgae extract that helps skin retain moisture and defends against environmental stress.

Irritation

low

Source

natural

beautyskincarehumectantantioxidant
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Antioxidant

Porphyridium Zinc Ferment

PORPHYRIDIUM/ZINC FERMENT

4.0

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

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review

Antioxidant

Portuguese Cypress Callus Extract

Cupressus Lusitanica Callus Extract

3.8

A gentle plant extract with antioxidant potential, but research is still early and benefits are not yet proven in large human studies.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Portulaca Molokiniensis Extract

Portulaca Molokiniensis Extract

4.0

A gentle, antioxidant-rich extract from a rare Hawaiian succulent that may help calm irritated skin and fight free radical damage.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Humectant

Postelsia Palm Extract

Postelsia Palmaeformis Thallus Extract

4.0

A gentle, ocean-sourced extract that helps hydrate and calm the skin, but research on its benefits is still emerging.

Irritation

low

Source

natural

beautyskincarehumectant
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Surfactant

Potassium Abietoyl Hydrolyzed Collagen

POTASSIUM ABIETOYL HYDROLYZED COLLAGEN

3.8

A gentle, amino-acid-based surfactant that cleanses without stripping, making it a good choice for sensitive or dry skin and hair.

Irritation

low

Source

semi-synthetic

beautyskincarehaircaresurfactant
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Flavoring Agent

Potassium Acesulfame

POTASSIUM ACESULFAME

2.5

A safe synthetic sweetener used in tiny amounts to improve taste in lip and oral products, but it offers no skincare benefit.

Irritation

low

Source

synthetic

beautyskincareflavoring agent
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Buffering Agent

Potassium Acetate

Potassium Acetate

3.5

Potassium Acetate is a safe, low-irritation salt that helps control a product's pH and can support preservative systems.

Irritation

low

Source

synthetic

beautyskincarepreservative
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Film Former

Potassium Acrylates Copolymer

POTASSIUM ACRYLATES/ETHYLHEXYL ACRYLATE COPOLYMER

4.0

A safe, synthetic polymer that gives products a silky feel and helps them spread evenly without clogging pores.

Irritation

low

Source

synthetic

beautyskincaretexturizer
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Thickener

Potassium Alginate

Potassium Alginate

4.0

A gentle, seaweed-derived thickener that gives products a smooth gel feel and can create a temporary tightening sensation on skin.

Irritation

low

Source

natural

beautyskincarethickener
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