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 2,268
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

Emollient

1-Methyldecyl Acetate

1-METHYLDECYL ACETATE

3.5

A gentle synthetic ester that softens skin and improves product texture, with low irritation potential.

Irritation

low

Source

synthetic

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Emollient

Abietyl Alcohol

ABIETYL ALCOHOL

3.8

A gentle, plant-based fatty alcohol that softens skin and may help active ingredients absorb better, but it's less common and less studied than alternatives like cetyl alcohol.

Irritation

low

Source

natural

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Emollient

Acacia Dealbata Flower Wax

ACACIA DEALBATA FLOWER WAX

4.0

A gentle, plant-based wax that adds richness and staying power to balms and creams without common irritation.

Irritation

low

Source

natural

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Emollient

Acacia Decurrens Flower Wax

Acacia Decurrens Flower Wax

4.0

A gentle, plant-derived wax that helps lock in moisture and gives a smooth, velvety feel to skincare products.

Irritation

low

Source

natural

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Emollient

Acacia Decurrens Wax Ester

ACACIA DECURRENS/JOJOBA/SUNFLOWER SEED CERA/POLYGLYCERYL-3 ESTERS

4.0

A gentle, plant-based wax ester that helps soften skin and improve product texture without clogging pores.

Irritation

low

Source

natural

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Emollient

Acacia Decurrens Wax Esters

Acacia Decurrens/Jojoba/Sunflower Seed Wax Polyglyceryl-3 Esters

4.3

A gentle, plant-based wax blend that helps create smooth, creamy textures while moisturizing the skin.

Irritation

low

Source

natural

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Emollient

Acacia Flower Wax

Acacia Dealbata Flower Cera

4.0

A gentle, plant-derived wax that adds a smooth, velvety feel to balms and sticks without heavy greasiness.

Irritation

low

Source

natural

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Emollient

Acacia Victoriae Seed Oil

ACACIA VICTORIAE SEED OIL

4.0

A gentle, plant-based oil that hydrates and softens skin with a light feel, though research on its benefits is still emerging.

Irritation

low

Source

natural

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Emollient

Acetyl Trihexyl Citrate

Acetyl Trihexyl Citrate

4.2

A gentle, low-irritation emollient that helps products spread smoothly and keeps nail polish flexible.

Irritation

low

Source

semi-synthetic

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Emollient

Acetylated Copaiba Balsam Oil

COPAIFERA RETICULATA BALSAM OIL ACETYLATED

3.8

A gentle, modified plant oil that helps soften skin and improve product texture, but research on its specific benefits is still limited.

Irritation

low

Source

semi-synthetic

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Emollient

Acetylated Glycol Stearate

Acetylated Glycol Stearate

3.8

A gentle synthetic emollient that softens skin and improves product feel, with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

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Emollient

Acetylated Lard Glyceride

Acetylated Lard Glyceride

3.5

A semi-synthetic emollient that softens skin but may clog pores for some, and is not suitable for vegan or certain religious lifestyles.

Irritation

low

Source

semi-synthetic

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Emollient

Acetylated Monoglycerides

MONOGLYCERIDES ACETATE

4.0

A gentle, semi-synthetic emollient that softens skin and improves product feel without common irritation or clogging concerns.

Irritation

low

Source

semi-synthetic

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Emollient

Acetylated Sucrose Distearate

Acetylated Sucrose Distearate

4.0

A gentle, sugar-derived emollient that helps products feel silky and spread smoothly without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Adesmia Boronioides Oil

ADESMIA BORONIOIDES FLOWER/LEAF/STEM OIL

4.0

A gentle, antioxidant-rich oil from Patagonia that helps soothe and soften skin without clogging pores.

Irritation

low

Source

natural

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Emollient

African Locust Bean Seed Oil

Pentaclethra macroloba seed oil

4.3

A lightweight, non-greasy Amazonian oil that deeply moisturizes and helps calm irritation without clogging pores.

Irritation

low

Source

natural

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Emollient

Akebia Quinata Seed Oil

AKEBIA QUINATA SEED OIL

4.0

A gentle, plant-based oil that hydrates and softens skin without clogging pores, though research on its specific benefits is still limited.

Irritation

low

Source

natural

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Emollient

Alfalfa Oil Unsaponifiables

MEDICAGO SATIVA OIL UNSAPONIFIABLES

4.0

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

Irritation

low

Source

natural

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Emollient

Allanblackia Seed Butter

ALLANBLACKIA STUHLMANNII SEED BUTTER

4.0

A gentle, non-greasy butter that softens and hydrates skin without clogging pores, ideal for dry or sensitive skin.

Irritation

low

Source

natural

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Emollient

Almond Oil Glycereth-8 Esters

ALMOND OIL GLYCERETH-8 ESTERS

4.0

A gentle, semi-synthetic ingredient that combines the moisturizing benefits of almond oil with improved water solubility for stable, non-greasy formulas.

Irritation

low

Source

semi-synthetic

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Emollient

Almond Oil PEG-6 Esters

ALMOND OIL PEG-6 ESTERS

4.0

A gentle, semi-synthetic emollient that helps products spread smoothly and leaves skin feeling soft without clogging pores.

Irritation

low

Source

semi-synthetic

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Emollient

Almond Oil PEG-8 Esters

ALMOND OIL PEG-8 ESTERS

4.0

A gentle, PEG-modified almond oil that helps products spread smoothly and feel silky without clogging pores.

Irritation

low

Source

semi-synthetic

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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

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Emollient

Alternanthera Sessilis Oil

Alternanthera Sessilis Oil

3.8

A gentle, plant-derived oil with traditional use for soothing skin, though modern research is still limited.

Irritation

low

Source

natural

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Emollient

Aluminum Lanolate

ALUMINUM LANOLATE

3.5

Aluminum Lanolate is a waxy stabilizer that helps keep water and oil mixed, but it may not suit acne-prone skin due to its moderate comedogenic potential.

Irritation

low

Source

semi-synthetic

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Emollient

Amaranth Seed Oil

Amaranthus Spinosus Seed Oil

4.0

A gentle, plant-based oil that hydrates and provides antioxidant protection, suitable for most skin types.

Irritation

low

Source

natural

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Emollient

Amaranthus Seed Oil

Amaranthus Hypochondriacus Seed Oil

4.0

A gentle, plant-based oil that hydrates and protects skin without clogging pores.

Irritation

low

Source

natural

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Emollient

Amburana Seed Oil

Amburana Cearensis Seed Oil

4.0

A gentle, plant-based oil that helps moisturize and soften skin with a subtle, warm scent.

Irritation

low

Source

natural

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Emollient

American Linden Flower Oil

Tilia Americana Flower Oil

3.8

A gentle, lightly fragrant oil that may help soothe and soften skin, but research is limited and it is best used as a supporting ingredient.

Irritation

low

Source

natural

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Emollient

Amyl Octanoate

Amyl Octanoate

4.0

A lightweight, non-greasy emollient that helps soften skin and improve product texture without clogging pores.

Irritation

low

Source

synthetic

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Emollient

Amyl Valerate

Amyl Valerate

4.0

A lightweight, non-greasy emollient that softens skin without clogging pores, ideal for oily or combination skin types.

Irritation

low

Source

synthetic

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Emollient

Andiroba Seed Oil

Carapa guaianensis seed oil

4.0

A gentle Amazonian oil that hydrates and soothes, ideal for dry or sensitive skin.

Irritation

low

Source

natural

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Emollient

Animal-Derived Ingredient Complex

Animal-Derived Ingredient Complex

3.5

Animal-derived ingredients can be effective but raise ethical and allergy concerns; check labels if you prefer plant-based options.

Irritation

low

Source

natural

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Emollient

Annatto Seed Oil

Bixa Orellana Seed Oil

4.0

A gentle, antioxidant-rich oil that helps soften skin and may offer some environmental protection.

Irritation

low

Source

natural

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Emollient

Apple Peel Wax

Pyrus Malus Peel Cera

4.0

Apple peel wax is a gentle, plant-based emollient that helps soften and protect the skin while adding texture to balms and creams.

Irritation

low

Source

natural

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Emollient

Apple Seed Oil

Pyrus Malus Seed Oil

4.0

A gentle, plant-based oil that hydrates and softens skin without clogging pores, backed by moderate evidence for antioxidant benefits.

Irritation

low

Source

natural

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Emollient

Apricot Kernel Extract

Prunus Armeniaca (Apricot) Kernel Extract

4.0

A gentle, plant-based emollient that helps soften and condition skin without clogging pores.

Irritation

low

Source

natural

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Emollient

Apricot Kernel Ferment Oil

KLUYVEROMYCES/LACTOBACILLUS/APRICOT KERNEL FERMENT OIL FILTRATE

4.0

A gentle fermented oil that moisturizes and softens skin, with potential antioxidant benefits from fermentation.

Irritation

low

Source

biotech

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