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

Anti-aging agent

Oligopeptide-87

Oligopeptide-87

4.0

Oligopeptide-87 is a lab-made peptide that may help support collagen and improve skin firmness, but research is still early.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-Aging Agent

Oligopeptide-88

Oligopeptide-88

4.0

A synthetic peptide that may help reduce fine lines and improve skin firmness, but more human studies are needed.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Skin conditioning agent

Oligopeptide-89

Oligopeptide-89

4.0

A synthetic peptide that supports skin barrier function and hydration, with low irritation potential.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Oligopeptide-90

Oligopeptide-90

4.0

A lab-made peptide that may help support collagen and improve skin firmness, but human data is still limited.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Oligopeptide-91

Oligopeptide-91

3.8

Oligopeptide-91 is a lab-made peptide that may help firm skin and reduce fine lines, but research is still early and results vary.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-wrinkle agent

Oligopeptide-91 with Botulinum-like Peptide

SR-Oligopeptide-91, Clostridium Botulinum Polypeptide-1

3.8

A synthetic peptide that may help soften expression lines by temporarily relaxing facial muscles, but results are subtle and not comparable to injectables.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Oligopeptide-91 with SH-Polypeptide-1

Oligopeptide-91, SH-Polypeptide-1

4.0

A synthetic peptide duo that may help smooth fine lines and improve skin firmness, but more human studies are needed to confirm its effects.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Oligopeptide-98 Amide

Oligopeptide-98 Amide

4.0

A synthetic peptide amide that may help improve skin firmness and reduce fine lines, but research is still emerging.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Oligopeptide-99 Amide

Oligopeptide-99 Amide

4.0

A lab-made peptide that may help firm skin and soften wrinkles, but human studies are still limited.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Surfactant

Olivamide DEA

Olivamide DEA

3.8

A gentle, olive-derived surfactant that helps create rich lather and thicker formulas, but may not suit those avoiding all amide-based ingredients.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Olivamidopropyl Betaine

OLIVAMIDOPROPYL BETAINE

4.5

A gentle, olive oil-derived surfactant that cleans without stripping the skin, ideal for sensitive skin and baby care.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Conditioning Agent

Olivamidopropyl Dimethylamine

Olivamidopropyl Dimethylamine

4.2

A gentle, olive-oil-derived conditioner that softens hair and skin without heavy buildup, ideal for sensitive scalps.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Surfactant

Olivamidopropylamine Oxide

Olivamidopropylamine Oxide

4.0

A gentle, plant-derived surfactant that cleanses without stripping the skin, making it ideal for sensitive skin and daily use.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Antistatic Agent

Olivamidopropyltrimonium Chloride

Olivamidopropyltrimonium Chloride

4.0

A gentle, olive-derived conditioning ingredient that helps detangle hair and reduce static without heavy buildup.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
Read ingredient review

Solvent

Olive Alcohol

Alcohol Denat. (Olive-derived)

3.5

Olive alcohol is a natural astringent that can help degrease oily skin but may be drying or irritating for sensitive types.

Irritation

moderate

Source

natural

beautyskincaresolvent
Read ingredient review

Antioxidant

Olive Bark Extract

Olea Europaea Bark Extract

3.8

Olive bark extract is a gentle antioxidant that may help protect skin from environmental stress, but research on its topical benefits is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Olive Branch Extract

Olea Europaea Branch Extract

3.8

A gentle botanical extract that may help calm skin and fight free radicals, but research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Olive Bud Extract

Olea Europaea Bud Extract

4.0

A mild, plant-based antioxidant that may help calm and protect skin, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Soothing agent

Olive Ferment Filtrate

Pseudozyma Epicola/Olive Fruit Oil Ferment Filtrate

4.0

A gentle, fermented ingredient that may help calm irritation and support the skin barrier, though research is still emerging.

Irritation

low

Source

biotech

beautyskincaresoothing agent
Read ingredient review

Antioxidant

Olive Flower Extract

Olea Europaea Flower Extract

3.8

A gentle, antioxidant-rich botanical extract that may help soothe and protect skin, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Soothing agent

Olive Flower Water

Olea Europaea Flower Water

3.8

A mild, aromatic floral water that offers light hydration and a soothing feel, but lacks strong clinical evidence for specific skin benefits.

Irritation

low

Source

natural

beautyskincaresoothing
Read ingredient review

Antioxidant

Olive Fruit Juice

Olea Europaea Fruit Juice

4.0

Olive fruit juice is a gentle, antioxidant-rich ingredient that hydrates and soothes skin without the heavy feel of olive oil.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Emollient

Olive Fruit Unsaponifiables

Olea Europaea Fruit Unsaponifiables

4.3

A gentle, plant-derived emollient that helps calm and reinforce the skin barrier without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Emollient

Olive Husk Oil

Olea Europaea Husk Oil

4.0

Olive Husk Oil is a gentle, antioxidant-rich emollient that hydrates skin without feeling heavy, but it may clog pores for some people.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Exfoliant

Olive Husk Powder

Olea Europaea Husk Powder

3.8

A gentle, natural physical exfoliant that polishes skin without harsh microplastics, but may feel too gritty for sensitive skin.

Irritation

low

Source

natural

beautyskincareexfoliant
Read ingredient review

Antioxidant

Olive Leaf Extract

Olea Europaea Leaf Extract

4.0

Olive leaf extract is a gentle antioxidant that helps protect skin from environmental stress and may calm minor irritation.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Skin conditioning

Olive Oil Amino Lipid Complex

OLIVE FRUIT OIL AMINOPROPANEDIOL AMIDES/ESTERS

4.0

A mild, olive-derived conditioning ingredient that helps soften skin and improve moisture retention without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareconditioning agent
Read ingredient review

Emollient

Olive Oil Decyl Esters

OLIVE OIL DECYL ESTERS

4.3

A lightweight, non-greasy emollient derived from olive oil that helps moisturize and soften skin without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emollient

Olive Oil Ethyl Ester

Olea Europaea Fruit Oil Ethyl Ester

4.3

A lightweight, non-greasy emollient derived from olive oil that softens skin without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emollient

Olive Oil Ethylhexyl Esters

Olive Oil Ethylhexyl Esters

4.3

A lightweight, non-greasy emollient derived from olive oil that softens skin and improves product texture without clogging pores.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Humectant

Olive Oil Ferment Filtrate

SACCHAROMYCES/OLEA EUROPAEA FRUIT OIL/GLYCERIN FERMENT FILTRATE

4.0

A gentle fermented ingredient that helps hydrate and support the skin barrier without irritation.

Irritation

low

Source

biotech

beautyskincarehumectant
Read ingredient review

Emulsifier

Olive Oil Glycereth-8 Esters

OLIVE OIL GLYCERETH-8 ESTERS

4.0

A mild, olive-derived emulsifier that helps blend water and oil in formulas while leaving skin feeling soft.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

Olive Oil PEG-10 Esters

OLIVE OIL PEG-10 ESTERS

4.0

A mild, olive-oil-derived emulsifier that helps blend oil and water in cleansers and creams, with a low risk of irritation.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

Olive Oil PEG-6 Esters

OLIVE OIL PEG-6 ESTERS

4.0

A mild, olive-derived emulsifier that helps blend oil and water in cleansers and creams, with low irritation potential.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

Olive Oil PEG-7 Esters

OLIVE OIL PEG-7 ESTERS

4.0

A mild, olive-derived emulsifier that helps blend oil and water in cleansers and moisturizers while leaving skin feeling soft.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emulsifier

Olive Oil PEG-8 Esters

OLIVE OIL PEG-8 ESTERS

4.0

A mild, olive-derived emulsifier that helps blend oil and water in your skincare, with low irritation potential.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Emollient

Olive Oil Propylene Glycol Esters

OLIVE OIL PROPYLENE GLYCOL ESTERS

4.0

A gentle, olive-derived emollient that helps soften skin and stabilize water-and-oil mixtures without heavy greasiness.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emollient

Olive Oil Unsaponifiables

Olea Europaea Oil Unsaponifiables

4.3

A nourishing, non-greasy fraction of olive oil that helps restore the skin barrier and soothe dryness without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Film Former

Olive Oil Wheat Protein

OLIVOYL HYDROLYZED WHEAT PROTEIN

4.0

A gentle, plant-derived conditioning ingredient that helps hair and skin feel soft and smooth without heavy buildup.

Irritation

low

Source

semi-synthetic

beautyskincarehaircareconditioning agent
Read ingredient review

Humectant

Olive Sap Extract

Olea Europaea Sap Extract

3.8

Olive sap extract is a gentle, hydrating ingredient with antioxidant potential, but research is limited compared to more established olive-derived ingredients like olive oil or leaf extract.

Irritation

low

Source

natural

beautyskincarehumectant
Read ingredient review

Exfoliant

Olive Seed Powder

Olea Europaea Seed Powder

3.8

A gentle, natural physical exfoliant that polishes skin without harsh microplastics, but may feel too gritty for sensitive skin.

Irritation

low

Source

natural

beautyskincareexfoliant
Read ingredient review

Antioxidant

Olive Wood Extract

Olea Europaea Wood Extract

4.0

Olive Wood Extract is a gentle, antioxidant-rich ingredient that helps protect skin from environmental stress, though research on its cosmetic benefits is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Emulsifier

Olive-Derived Amino Lipid

Bis-C24-28 Hydroxyalkyl OlivoYL Glutamate

4.0

A mild, olive-derived emulsifier that helps create stable, creamy textures while being very gentle on skin.

Irritation

low

Source

semi-synthetic

beautyskincareemulsifier
Read ingredient review

Surfactant

Oliveamide MEA

OLIVEAMIDE MEA

4.0

A gentle, olive-derived surfactant that boosts foam and cleanses without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Antioxidant

Olivine Extract

Olivine Extract

3.5

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

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Emollient

Olus Oil

Olus Oil

4.0

Olus Oil is a gentle, plant-derived emollient that softens and smooths skin without heavy greasiness.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Antioxidant

Onion Bulb Extract

Allium Cepa Bulb Extract

3.8

Onion bulb extract is a gentle, antioxidant-rich ingredient that may help soothe skin and support a more even tone.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Humectant

Onsen-Sui

Water, Butylene Glycol, Glycerin, Dipropylene Glycol, PEG-60 Hydrogenated Castor Oil, Phenoxyethanol, Chlorphenesin, Sodium Hyaluronate, Hydrolyzed Collagen, Aloe Barbadensis Leaf Extract, Camellia Sinensis Leaf Extract, Chamomilla Recutita (Matricaria) Flower Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Thymus Vulgaris (Thyme) Extract, Salvia Officinalis (Sage) Leaf Extract, Lavandula Angustifolia (Lavender) Flower Extract, Citrus Limon (Lemon) Fruit Extract, Citrus Aurantium Dulcis (Orange) Fruit Extract, Citrus Paradisi (Grapefruit) Fruit Extract, Vitis Vinifera (Grape) Seed Extract, Tocopherol, Ascorbic Acid, Retinyl Palmitate, Biotin, Folic Acid, Niacinamide, Panthenol, Pyridoxine HCl, Riboflavin, Thiamine HCl, Cyanocobalamin, Zinc PCA, Copper PCA, Magnesium PCA, Manganese PCA, Potassium PCA, Silica, Sodium PCA, Hydrolyzed Elastin, Hydrolyzed Keratin, Hydrolyzed Silk, Hydrolyzed Wheat Protein, Hydrolyzed Soy Protein, Hydrolyzed Rice Protein, Hydrolyzed Oat Protein, Hydrolyzed Corn Protein, Hydrolyzed Potato Protein, Hydrolyzed Yeast Protein, Hydrolyzed Milk Protein, Hydrolyzed Egg Protein, Hydrolyzed Fish Collagen, Hydrolyzed Shark Cartilage, Hydrolyzed Chondroitin Sulfate, Hydrolyzed Glycosaminoglycans, Hydrolyzed Hyaluronic Acid, Hydrolyzed Keratin, Hydrolyzed Silk, Hydrolyzed Wheat Protein, Hydrolyzed Soy Protein, Hydrolyzed Rice Protein, Hydrolyzed Oat Protein, Hydrolyzed Corn Protein, Hydrolyzed Potato Protein, Hydrolyzed Yeast Protein, Hydrolyzed Milk Protein, Hydrolyzed Egg Protein, Hydrolyzed Fish Collagen, Hydrolyzed Shark Cartilage, Hydrolyzed Chondroitin Sulfate, Hydrolyzed Glycosaminoglycans, Hydrolyzed Hyaluronic Acid

3.8

Onsen-Sui is a multi-ingredient blend that mimics the benefits of hot spring water, offering hydration, soothing effects, and a cocktail of antioxidants and nutrients for the skin.

Irritation

low

Source

mixed

beautyskincarehumectantantioxidant
Read ingredient review