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

Persimmon Ferment Extract

SACCHAROMYCES/PERSIMMON FRUIT JUICE FERMENT EXTRACT

4.0

A gentle, antioxidant-rich ferment that may help brighten and soothe skin with minimal irritation risk.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Persimmon Ferment Filtrate

Pediococcus/Diospyros Kaki Fruit Ferment Filtrate

4.0

A gentle fermented fruit extract that may help protect skin from environmental stress, though research is still developing.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Persimmon Fruit Extract

Diospyros Kaki Fruit Extract

4.0

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

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Persimmon Fruit Powder

DIOSPYROS KAKI FRUIT POWDER

4.0

Persimmon fruit powder is a gentle, antioxidant-rich ingredient that helps soothe skin and provide mild exfoliation, but it is not a potent active like vitamin C or retinol.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Persimmon Leaf Extract

Diospyros Kaki Leaf Extract

4.0

A gentle, plant-based antioxidant that helps calm skin and defend against environmental stress, but research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Persimmon Leaf Powder

Diospyros Kaki Leaf Powder

3.8

A gentle botanical powder that may offer antioxidant benefits, but research is limited and it is rarely used as a standalone active.

Irritation

low

Source

natural

beautyskincarebotanical
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Soothing Agent

Persimmon Leaf Water

Diospyros Kaki Leaf Water

4.0

A gentle, antioxidant-rich botanical water that hydrates and soothes skin, but research on its specific benefits is still limited compared to more studied ingredients.

Irritation

low

Source

natural

beautyskincarebotanical
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Film Former

PET Copolymer

PENTAERYTHRITOL/TEREPHTHALIC ACID COPOLYMER

3.8

A synthetic polymer that creates a flexible, water-resistant film on skin or lashes to help makeup last longer.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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Occlusive

Petrolatum

Petrolatum

4.5

Petrolatum is a time-tested, highly effective occlusive that locks in moisture and protects the skin barrier, with a strong safety record when properly refined.

Irritation

low

Source

synthetic

beautyskincareocclusive
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Antioxidant

Pfaffia Paniculata Root Extract

Pfaffia Paniculata Root Extract

3.8

A gentle, antioxidant-rich root extract that may help calm skin and fight free radical damage, though human studies are limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Pfaffia Root Juice

Pfaffia Glomerata Root Juice

3.8

Pfaffia Glomerata Root Juice is a gentle, antioxidant-rich plant extract that may help calm skin and fight free radical damage, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Humectant

PG-Hydrolyzed Collagen

PG-Hydrolyzed Collagen

3.8

A modified collagen that helps hydrate and temporarily plump the skin, but its large molecule size limits deep penetration.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
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Hair Conditioner

PG-Hydrolyzed Keratin

PG-Hydrolyzed Keratin

4.0

A gentle protein ingredient that can temporarily strengthen hair and help skin feel smoother, but effects are not permanent.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Film Former

PG-Hydrolyzed Rice Protein

PG-Hydrolyzed Rice Protein

4.0

A gentle protein derivative that helps strengthen hair and lightly condition skin without heavy buildup.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
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Humectant

PG-Hydrolyzed Silk

PG-Hydrolyzed Silk

4.0

A gentle silk-derived humectant that helps skin feel smooth and hydrated without being heavy or greasy.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
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Humectant

PG-Hydrolyzed Soy Protein

PG-HYDROLYZED SOY PROTEIN

4.0

A gentle, water-binding protein derivative that adds moisture and softness to hair and skin without heavy buildup.

Irritation

low

Source

semi-synthetic

beautyskincarehaircarehumectant
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Film Former

PG-Hydrolyzed Wheat Protein

PG-HYDROLYZED WHEAT PROTEIN

4.0

A gentle, water-soluble wheat protein that helps hair and skin retain moisture and feel smoother.

Irritation

low

Source

semi-synthetic

beautyskincarehaircarefilm former
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Skin Conditioning Agent

PG-Palmitoylpalmitamide

PG-PALMOYLPALMAMIDE

3.5

A synthetic ingredient that helps condition skin and stabilize formulas, but research on its specific benefits is still limited.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Antioxidant

Phaseolus Trilobus Seed Extract

Phaseolus Trilobus Seed Extract

3.5

A gentle, plant-derived antioxidant extract with limited but promising research; best for soothing and protecting normal to dry skin.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Phebalium Nudum Extract

Phebalium Nudum Flower/Leaf Extract

3.5

A gentle, antioxidant-rich botanical extract from an Australian native plant, promising for soothing and protecting skin, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Phellinus Linteus Rice Ferment

Phellinus Linteus/Rice Ferment Extract

4.0

A fermented mushroom-rice blend that may help soothe and protect skin, though research is still emerging.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Phellodendron Bark Extract

Phellodendron Chinense Bark Extract

4.0

A gentle botanical extract that helps calm skin and fight free radical damage, best for those with sensitive or stressed skin.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Surfactant

Pheneth-6 Phosphate

PHENETH-6 PHOSPHATE

4.0

A gentle, phosphate-based surfactant that cleanses effectively while being kinder to sensitive skin than traditional sulfates.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
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Fragrance ingredient

Phenethyl 2-Ethylbutyrate

PHENETHYL 2-ETHYLBUTYRATE

3.5

A synthetic fragrance ester that adds a fruity, floral scent to products but offers no skincare benefits.

Irritation

low

Source

synthetic

beautyskincarefragrance
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Fragrance Ingredient

Phenethyl 2-Methylbutyrate

PHENETHYL 2-METHYLBUTYRATE

3.5

A synthetic fragrance ester that adds a floral, honey-like scent; generally safe at low concentrations but may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance

Phenethyl Acetate

PHENETHYL ACETATE

3.8

Phenethyl acetate is a pleasant-smelling fragrance ingredient found naturally in many flowers and fruits, generally considered safe at the low levels used in cosmetics.

Irritation

low

Source

natural

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Phenethyl Alcohol

PHENETHYL ALCOHOL

4.0

A gentle, rose-scented alcohol that adds fragrance and helps preserve formulas without the drying effects of denatured alcohol.

Irritation

low

Source

natural

beautyskincarefragrance
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Fragrance Ingredient

Phenethyl Anthranilate

PHENETHYL ANTHRANILATE

3.5

Phenethyl anthranilate is a synthetic fragrance ingredient with mild UV-absorbing properties, generally considered safe at low concentrations but may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Skin Conditioning

Phenethyl Benzoate

PHENETHYL BENZOATE

4.0

Phenethyl benzoate is a gentle synthetic ester that helps condition skin and carry fragrance, with a low risk of irritation.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Phenethyl Butyrate

PHENETHYL BUTYRATE

3.5

Phenethyl Butyrate is a synthetic fragrance ingredient that adds a pleasant floral or fruity scent to products, but it offers no skincare benefits and may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Antioxidant

Phenethyl Caffeate

PHENETHYL CAFFEATE

4.0

A gentle antioxidant from propolis that helps protect skin from environmental stress and may support a calmer, more even complexion.

Irritation

low

Source

natural

beautyskincareantioxidant
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Fragrance Ingredient

Phenethyl Cinnamate

PHENETHYL CINNAMATE

3.5

Phenethyl Cinnamate is a gentle, naturally derived fragrance ingredient with some antioxidant potential, but its benefits in skincare are not yet well-established.

Irritation

low

Source

natural

beautyskincarefragrance
Read ingredient review

Antimicrobial

Phenethyl Crotonate

PHENETHYL CROTONATE

3.5

Phenethyl Crotonate is a gentle synthetic ingredient that may help control bacteria on skin, but research is limited and it's not a standalone acne solution.

Irritation

low

Source

synthetic

beautyskincareantimicrobial
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Emollient

Phenethyl Dimethicone

PHENETHYL DIMETHICONE

4.0

Phenethyl Dimethicone is a lightweight silicone that smooths skin, reduces tackiness, and helps products glide on without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Skin Conditioning Agent

Phenethyl Disiloxane

PHENETHYL DISILOXANE

4.0

A lightweight silicone that gives a silky, non-greasy feel and helps other ingredients spread smoothly on skin.

Irritation

low

Source

synthetic

beautyskincaresilicone
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Fragrance Ingredient

Phenethyl Formate

PHENETHYL FORMATE

3.5

Phenethyl Formate is a synthetic fragrance ingredient that adds a floral, rose-like scent to products; it is generally considered safe at low concentrations but offers no skincare benefits.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Antioxidant

Phenethyl Isothiocyanate

PHENETHYL ISOTHIOCYANATE

3.8

A plant-derived compound with promising antioxidant and antimicrobial benefits, but limited research in topical skincare and potential for skin irritation.

Irritation

moderate

Source

natural

beautyskincareantioxidant
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Fragrance

Phenethyl Isovalerate

PHENETHYL ISOVALERATE

4.0

Phenethyl Isovalerate is a synthetic fragrance ingredient that adds a pleasant floral-honey note to products, with a low risk of irritation for most people.

Irritation

low

Source

synthetic

beautyskincarefragrance
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Fragrance Ingredient

Phenethyl Methyl Ethyl Carbinyl Acetate

PHENETHYL METHYL ETHYL CARBINYL ACETATE

3.5

A synthetic scent ingredient that adds a pleasant floral note but offers no skincare benefit and may be unnecessary for sensitive noses.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Phenethyl Phenylacetate

PHENETHYL PHENYLACETATE

3.5

Phenethyl Phenylacetate is a synthetic fragrance ingredient that adds a sweet, floral scent to products but offers no direct skincare benefits.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Phenethyl Pivalate

PHENETHYL PIVALATE

3.8

A synthetic ester that adds a mild floral scent and light emollient feel, generally considered safe at low concentrations.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Phenethyl Propionate

PHENETHYL PROPIONATE

3.5

Phenethyl Propionate is a synthetic fragrance ingredient that adds a sweet, floral scent to products, but it offers no skin benefits and may cause sensitivity in some individuals.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Fragrance Ingredient

Phenethyl Salicylate

PHENETHYL SALICYLATE

4.0

Phenethyl Salicylate is a gentle synthetic ingredient that adds a pleasant floral scent and offers mild UV protection, but it is not a primary sunscreen agent.

Irritation

low

Source

synthetic

beautyskincarefragranceuv-absorber
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Fragrance Ingredient

Phenethyl Tiglate

PHENETHYL TIGLATE

3.5

Phenethyl Tiglate is a synthetic fragrance ingredient that adds a floral, rosy scent to products, but offers no skincare benefits and may be a concern for those with fragrance sensitivities.

Irritation

low

Source

synthetic

beautyskincarefragrance
Read ingredient review

Colorant

Phenolsulfonphthalein

Phenolsulfonphthalein

2.5

Phenolsulfonphthalein is a synthetic dye used in tiny amounts for color; it has no proven skincare benefits and is generally safe at low concentrations.

Irritation

low

Source

synthetic

beautyskincarecolorant
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Film Former

Phenoxy PEG-2 Acrylate

PHENOXY PEG-2 ACRYLATE

3.5

A synthetic film-former that helps products like nail polish and mascara dry into a smooth, durable layer.

Irritation

low

Source

synthetic

beautyskincarefilm-former
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