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

Pimento Berry Extract

Pimenta Officinalis Fruit Extract

4.0

Pimento Berry Extract offers antioxidant protection and mild soothing benefits, making it a gentle addition to antioxidant-rich formulations.

Irritation

low

Source

natural

beautyskincareantioxidant
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Fragrance

Pimento Berry Oil

Pimenta Officinalis Fruit Oil

3.8

Pimento berry oil adds a warm, spicy scent and offers antioxidant benefits, but its essential oil nature means it can irritate sensitive skin if used too strong.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Fragrance

Pimento Leaf Oil

Pimenta Officinalis Leaf Oil

3.8

Pimento leaf oil adds a warm, spicy scent to products but can be irritating for sensitive skin; it's best used in low concentrations.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Antioxidant

Pimpinella Brachycarpa Leaf Extract

PIMPINELLA BRACHYCARPA LEAF EXTRACT

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Pimpinella Extract

PIMPINELLA GUSTAVOHEGIANA EXTRACT

3.5

A gentle botanical extract with limited research, offering potential antioxidant and soothing benefits for sensitive skin.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Humectant

Pinacol

PINACOL

3.5

Pinacol is a synthetic humectant that helps hydrate the skin and can improve the feel of other ingredients, but it is less common and less studied than alternatives like glycerin.

Irritation

low

Source

synthetic

beautyskincarehumectant
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Fragrance

Pinanal

PINANAL

3.5

Pinanal is a synthetic pine-scented fragrance ingredient that adds a fresh aroma but offers no skincare benefits and may irritate sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
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Fragrance Ingredient

Pinane Carbaldehyde

PINANE CARBALDEHYDE

3.5

Pinane Carbaldehyde is a synthetic fragrance component that adds a pine-like aroma but may cause skin irritation in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarefragrance
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Humectant

Pinanediol

Pinanediol

4.0

Pinanediol is a gentle, plant-derived humectant that helps hydrate and soothe skin, with early research suggesting additional antioxidant and anti-inflammatory benefits.

Irritation

low

Source

natural

beautyskincarehumectant
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Fragrance Ingredient

Pinanyl Methyl Ketone

Pinanyl Methyl Ketone

3.5

Pinanyl Methyl Ketone is a synthetic scent ingredient that adds a pine-like aroma to products, but it offers no skincare benefits and may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
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Skin conditioning

Pine & Soy Ferment Filtrate

BACILLUS/(PINUS DENSIFLORA/PARVIFLORA/THUNBERGII) LEAF/SOYBEAN FERMENT FILTRATE

4.0

A gentle, fermented botanical blend that may support skin hydration and antioxidant defense, but research is still emerging.

Irritation

low

Source

biotech

beautyskincareantioxidantskin conditioning
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Antioxidant

Pine Bark Extract

Pinus Taeda Bark Extract

4.0

A gentle, antioxidant-rich botanical extract that helps defend skin from environmental stress and may support a more even tone.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Pine Branch/Leaf Extract

Pinus Thunbergii Branch/Leaf Extract

4.0

A gentle, plant-derived antioxidant that helps protect skin from environmental stress and may calm irritation.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Pine Bud Extract

Pinus Sylvestris Bud Extract

4.0

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Pine Callus Culture Extract

Pinus Koraiensis Callus Culture Extract

4.0

A gentle, lab-grown plant extract that may help calm skin and defend against environmental stress, though human studies are still limited.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Pine Callus Extract

Pinus Densiflora Callus Extract

4.0

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Pine Callus Powder

Pinus Pinaster Callus Powder

4.0

A gentle, plant-based antioxidant from pine callus cells that may help calm and protect skin, though research is still early.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Pine Cone Extract

Pinus Thunbergii Cone Extract

3.8

A gentle, antioxidant-rich pine cone extract that may help calm and protect skin, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Pine Leaf Extract

Pinus Thunbergii Leaf Extract

4.0

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Pine Leaf Ferment Filtrate

Pinus Densiflora Leaf/Sugar Ferment Filtrate

4.0

A gentle, fermented botanical extract that may help calm skin and fight environmental stress, though human studies are limited.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Pine Leaf Oil

Pinus Sylvestris Leaf Oil

3.5

Pine leaf oil adds a fresh, woodsy scent to products but can be irritating for sensitive skin and is primarily used for fragrance rather than active skincare benefits.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Exfoliant

Pine Leaf Powder

Pinus Densiflora Leaf Powder

3.8

A natural powdered leaf ingredient that provides gentle physical exfoliation and antioxidant benefits, but may be too abrasive for sensitive or compromised skin.

Irritation

moderate

Source

natural

beautyskincareexfoliant
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Soothing Agent

Pine Leaf Water

Pinus Sylvestris Leaf Water

3.8

A gentle, aromatic water from pine leaves that can add a refreshing feel and subtle soothing effect to skincare products.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Fragrance

Pine Leaf/Twig Oil

Pinus Pinaster Leaf/Twig Oil

3.8

A natural essential oil that adds a fresh, woodsy scent to products but may cause irritation in sensitive skin.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Antioxidant

Pine Nut Extract

Pinus Pinea Kernel Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Emollient

Pine Nut Oil

Pinus Pinea Kernel Oil

4.0

A gentle, non-greasy oil that hydrates and helps protect the skin barrier, suitable for most skin types.

Irritation

low

Source

natural

beautyskincareemollient
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Fragrance

Pine Oil

Pinus Palustris Oil

3.8

Pine oil adds a fresh scent and mild antimicrobial benefits, but can be irritating for sensitive skin and may clog pores in high concentrations.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Soothing Agent

Pine Resin Extract

Pinus Palustris Resin Extract

4.0

A gentle, natural resin extract that may help calm irritation and support the skin barrier, though research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Antioxidant

Pine Root Extract

Pinus Densiflora Root Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Pine Seed Extract

Pinus Densiflora Seed Extract

4.0

A gentle, plant-based antioxidant that may help calm skin and defend against environmental stress, though human studies are limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Emollient

Pine Seed Ferment Oil

KLUYVEROMYCES/LACTOBACILLUS/PINUS KORAIENSIS SEED FERMENT OIL FILTRATE

4.0

A gentle, fermented oil that moisturizes and soothes skin while providing antioxidant support, though research is still emerging.

Irritation

low

Source

biotech

beautyskincareemollient
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Emollient

Pine Seed Oil

Pinus Pinaster Seed Oil

4.0

A nourishing, non-greasy oil that helps soften skin and defend against environmental stress without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Soothing Agent

Pine Tar Oil

Pinus Palustris Tar Oil

3.8

Pine tar oil is a traditional ingredient known for soothing irritated skin and scalp, but its strong odor and potential for irritation mean it's best used in targeted, low-concentration formulas.

Irritation

moderate

Source

natural

beautyskincaresoothing
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Antioxidant

Pine Twig Leaf Extract

Pinus Sylvestris Twig Leaf Extract

4.0

A gentle, plant-derived antioxidant that helps protect skin from environmental stress while offering mild soothing benefits.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Pine Twig Leaf Oil

Pinus Species Twig Leaf Oil

3.5

Pine twig leaf oil adds a fresh, woodsy scent to products but can be irritating for sensitive skin and is best used at low concentrations.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Fragrance

Pine Twig Oil

Pinus Strobus Twig Oil

3.8

A natural essential oil that adds a fresh pine scent and may offer mild antimicrobial benefits, but can be irritating for sensitive skin.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Antioxidant

Pine Wood Extract

Pinus Longifolia Wood Extract

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Soothing agent

Pine Wood Tar

Pinus Palustris Wood Tar

3.8

A traditional natural ingredient with soothing and cleansing properties, but its strong scent and potential for irritation mean it's best for occasional use in rinse-off products.

Irritation

moderate

Source

natural

beautyskincaresoothing
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Surfactant

Pineamidopropyl Betaine

Pineamidopropyl Betaine

4.0

A gentle, plant-based surfactant that helps create a rich lather without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
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Exfoliant

Pineapple Fruit Extract

ANANAS SATIVUS FRUIT EXTRACT

4.0

Pineapple fruit extract offers gentle enzymatic exfoliation and antioxidant benefits, making it a good choice for those seeking a milder alternative to harsh acids.

Irritation

low

Source

natural

beautyskincareexfoliant
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Humectant

Pineapple Fruit Extract Beta-Glucan

Ananas Sativus (Pineapple) Fruit Extract, Beta-Glucan

4.0

A gentle, hydrating blend that pairs pineapple's mild fruit enzymes with beta-glucan's soothing moisture, ideal for brightening and smoothing without harsh irritation.

Irritation

low

Source

natural

beautyskincarehumectantexfoliant
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Exfoliant

Pineapple Fruit Juice

ANANAS SATIVUS FRUIT JUICE

4.0

Pineapple fruit juice offers gentle enzymatic exfoliation and antioxidant benefits, but its effectiveness in skincare is mild and varies by formulation.

Irritation

low

Source

natural

beautyskincareexfoliant
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Humectant

Pineapple Fruit Water

ANANAS SATIVUS FRUIT WATER

3.8

Pineapple Fruit Water offers gentle hydration and mild enzymatic exfoliation, but its benefits are largely from natural fruit sugars and enzymes rather than a concentrated active.

Irritation

low

Source

natural

beautyskincarehumectantantioxidant
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Soothing Agent

Pineapple Leaf Juice

ANANAS ERECTIFOLIUS LEAF JUICE

3.8

Pineapple Leaf Juice is a gentle, antioxidant-rich ingredient that may help soothe and protect the skin, but research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing
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Exfoliant

Pineapple Stem Powder

ANANAS SATIVUS STEM POWDER

4.0

A gentle, enzyme-rich exfoliant from pineapple stems that helps smooth skin without harsh scrubbing.

Irritation

moderate

Source

natural

beautyskincareexfoliant
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Soothing agent

Pineapple Weed Extract

MATRICARIA DISCOIDEA FLOWER/LEAF/STEM EXTRACT

4.0

A gentle, plant-based extract that may help calm irritated skin and provide antioxidant protection, though research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Soothing Agent

Pinellia Root Extract

PINELLIA TERNATA ROOT EXTRACT

3.8

A gentle herbal extract with traditional use for calming skin, but modern research is still limited.

Irritation

low

Source

natural

beautyskincaresoothing
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Antioxidant

Pinene

PINENE

3.5

Pinene is a plant-derived terpene with antioxidant and antimicrobial potential, but it can be irritating for sensitive skin and is primarily used for scent.

Irritation

moderate

Source

natural

beautyskincareantioxidant
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Antioxidant

Pink Evening Primrose Extract

Oenothera Rosea Extract

3.8

A gentle botanical extract with antioxidant and soothing potential, but research is limited compared to more studied plant extracts.

Irritation

low

Source

natural

beautyskincareantioxidant
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Fragrance

Pinus Lauricio Branch/Leaf Oil

Pinus Lauricio Branch/Leaf Oil

3.5

A fragrant pine oil that adds a fresh scent to products but may cause irritation in sensitive skin due to its essential oil content.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Fragrance

Pinus Lauricio Leaf Oil

Pinus Lauricio Leaf Oil

3.5

A fragrant pine leaf oil with limited research; may offer antimicrobial benefits but poses irritation and sensitivity risks, especially for sensitive skin.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Emollient

Pinus Parviflora Seed Oil

Pinus Parviflora Seed Oil

4.0

A gentle, non-greasy plant oil that hydrates and helps protect the skin barrier, suitable for most skin types including sensitive and oily skin.

Irritation

low

Source

natural

beautyskincareemollient
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Antioxidant

Piper Aurantiacum Fruit Extract

Piper Aurantiacum Fruit Extract

3.8

A gentle plant extract with antioxidant potential, but research is limited—best used as a supporting ingredient in antioxidant blends.

Irritation

low

Source

natural

beautyskincareantioxidant
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Fragrance

Piper Malacophyllum Oil

Piper Malacophyllum Flower/Leaf/Stem Oil

3.5

A fragrant essential oil from a tropical pepper plant, used mainly for scent in natural skincare, but with very limited research on skin benefits.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Antioxidant

Piper Marginatum Leaf Extract

Piper Marginatum Leaf Extract

3.5

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Fragrance

Piper Mollicomum Oil

Piper Mollicomum Flower/Leaf/Stem Oil

3.5

A fragrant plant oil with limited research; best used in low concentrations for its scent rather than proven skincare benefits.

Irritation

moderate

Source

natural

beautyskincarefragrance
Read ingredient review

Antioxidant

Piper Retrofactum Fruit Extract

PIPER RETROFRACTUM FRUIT EXTRACT

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Piper Retrofractum Fruit Powder

Piper Retrofractum Fruit Powder

3.8

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

Irritation

low

Source

natural

beautyskincareantioxidant
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