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

Soothing Agent

Micromeria Chamissonis Extract

Micromeria Chamissonis Flower/Leaf/Stem Extract

3.8

A gentle botanical extract with antioxidant potential, but research on its skincare benefits is still limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Antioxidant

Mignonette Extract

Reseda Odorata Flower/Leaf/Stem Extract

3.8

A gentle botanical extract with antioxidant potential, but research is limited and it's not a standout ingredient.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Moisturizer

Milk

Lac

3.8

Milk is a gentle, natural moisturizer that can soothe and soften skin, but it may not be suitable for those with dairy allergies or very oily skin.

Irritation

low

Source

natural

beautyskincaremoisturizer
Read ingredient review

Humectant

Milk Ferment

Lactobacillus Ferment

4.0

Milk ferment is a probiotic ingredient that gently hydrates and supports a healthy skin barrier, making it a good choice for sensitive or dry skin.

Irritation

low

Source

natural

beautyskincarehumectant
Read ingredient review

Humectant

Milk Protein

LAC PROTEIN

3.8

Milk protein is a gentle, natural humectant that helps hydrate and soften skin, but it offers only temporary surface benefits and may not suit those with dairy allergies.

Irritation

low

Source

natural

beautyskincarehumectant
Read ingredient review

Humectant

Milk Protein Complex

LAC (MILK) PROTEIN

3.8

Milk protein is a gentle, natural moisturizer that helps soften skin and improve texture, but it may not be suitable for those with dairy allergies or very sensitive skin.

Irritation

low

Source

natural

beautyskincaremoisturizer
Read ingredient review

Humectant

Milk Serum Protein

Lactis Serum Proteinum

3.8

A gentle, protein-rich ingredient that helps hydrate and temporarily smooth the skin's surface, but may not be suitable for those with dairy allergies.

Irritation

low

Source

natural

beautyskincarehumectantfilm-former
Read ingredient review

Antioxidant

Milk Thistle Callus Extract

Silybum Marianum Callus Extract

4.0

A gentle, antioxidant-rich extract from milk thistle callus cells that may help protect skin from environmental stress and support a calm complexion.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Milk Thistle Ethyl Ester

SILYBUM MARIANUM ETHYL ESTER

4.0

A stabilized form of milk thistle extract that helps defend skin from environmental stress and supports a more even tone.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Milk Thistle Powder

Silybum Marianum Powder

3.8

Milk thistle powder is a gentle, antioxidant-rich botanical that may help calm and protect skin, but its benefits are best supported by oral supplement research rather than topical studies.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Surfactant

Milkamidopropyl Amine Oxide

Milkamidopropyl Amine Oxide

4.0

A gentle, milk-derived surfactant that helps create a rich lather while being kinder to skin than many traditional cleansers.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Milkamidopropyl Betaine

Milkamidopropyl Betaine

4.0

A gentle, milk-derived surfactant that cleanses without stripping the skin, ideal for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Antioxidant

Millet Seed Extract

Panicum Miliaceum Seed Extract

4.0

A mild, plant-based antioxidant that helps calm irritation and protect skin from environmental stress.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Absorbent

Millet Seed Flour

PANICUM MILIACEUM SEED FLOUR

3.8

A gentle, natural absorbent powder from millet seeds that helps control oil and add a silky texture without clogging pores.

Irritation

low

Source

natural

beautyskincareabsorbent
Read ingredient review

Emollient

Millet Seed Oil

PANICUM MILIACEUM SEED OIL

4.0

Millet Seed Oil is a gentle, lightweight emollient rich in linoleic acid and antioxidants, ideal for normal to dry skin types seeking non-greasy hydration.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Antioxidant

Millet Sprout Extract

Panicum Miliaceum Sprout Extract

4.0

A gentle, antioxidant-rich plant extract that helps calm and protect the skin, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Humectant

Milt Extract

Milt Extract

3.8

Milt extract is a novel, protein-packed ingredient that may help hydrate and plump skin, but research is limited and it may not suit everyone due to its animal origin.

Irritation

low

Source

natural

beautyskincarehumectant
Read ingredient review

Soothing Agent

Mimosa Bark Powder

Mimosa Tenuiflora Bark Powder

3.8

Mimosa Bark Powder is a gentle botanical ingredient that may help calm and protect sensitive or irritated skin, though scientific research is still emerging.

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review

Soothing Agent

Mimosa Leaf Extract

Mimosa Tenuiflora Leaf Extract

3.8

A gentle, plant-based extract that may help calm skin and fight free radicals, but human research is still limited.

Irritation

low

Source

natural

beautyskincaresoothing agent
Read ingredient review

Soothing Agent

Mimosa Leaf Powder

Mimosa Tenuiflora Leaf Powder

3.8

A gentle botanical powder that may help calm irritation and provide antioxidant protection, though human studies are limited.

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review

Antioxidant

Mimosa Pudica Callus

MIMOSA PUDICA CALLUS

3.8

Mimosa pudica callus is a gentle, antioxidant-rich plant ingredient that may help calm skin and protect against environmental stress, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Soothing Agent

Mimosa Pudica Flower Water

MIMOSA PUDICA FLOWER WATER

3.8

Mimosa Pudica Flower Water is a mild, soothing hydrosol with antioxidant potential, but research on its cosmetic benefits is still limited.

Irritation

low

Source

natural

beautyskincaresoothing
Read ingredient review

Soothing Agent

Mimosa Pudica Leaf Extract

MIMOSA PUDICA LEAF EXTRACT

3.8

A gentle botanical extract with promising soothing and antioxidant benefits, though research is still emerging.

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review

Abrasive

Mineral & Shell Complex

Calcium Carbonate, Calcium Hydroxide, Calcium Oxide, Clay, Illite, Orthoclase, Oyster Shell Powder, Quartz Powder, Vermiculite, Zeolite Extract

3.5

A natural mineral blend that gently exfoliates and absorbs excess oil, but may be too abrasive for sensitive skin.

Irritation

moderate

Source

natural

beautyskincareexfoliant
Read ingredient review

Film Former

Mineral Complex Blend

MAGNESIUM/POTASSIUM/SILICON/FLUORIDE/HYDROXIDE/OXIDE

3.2

A blend of minerals that may help reinforce the skin barrier, but research on this specific combination is limited.

Irritation

low

Source

natural

beautyskincaremineral
Read ingredient review

Skin conditioning agent

Mineral Ferment Complex

SACCHAROMYCES/ZINC/IRON/GERMANIUM/COPPER/MAGNESIUM/SILICON FERMENT

4.0

A gentle, biotech-derived blend of yeast ferment and trace minerals that may support skin barrier function and radiance.

Irritation

low

Source

biotech

beautyskincareconditioning agent
Read ingredient review

Occlusive

Mineral Oil

Paraffinum Liquidum

3.8

Mineral oil is a safe, effective occlusive that locks in moisture, but its heavy texture may not suit oily or acne-prone skin.

Irritation

low

Source

synthetic

beautyskincareocclusive
Read ingredient review

Texture Enhancer

Mineral Oxide Complex

SODIUM PHOSPHORUS/ZINC/CALCIUM/SILICON/ALUMINUM/SILVER OXIDES

3.5

A multi-mineral oxide blend that adds texture and stability to cosmetics, with silver oxide providing mild antimicrobial benefits.

Irritation

low

Source

natural

beautyskincaretexturizer
Read ingredient review

Solvent

Mineral Spirits

MINERAL SPIRITS

1.5

Mineral spirits are harsh petroleum solvents with high irritation potential, best avoided in everyday skincare.

Irritation

high

Source

synthetic

beautyskincaresolvent
Read ingredient review

Emollient

Mink Oil

Mink Oil

3.5

Mink oil is a rich emollient that softens skin, but its animal origin and moderate comedogenic rating may not suit all skin types.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Emollient

Mink Oil PEG-13 Esters

MINK OIL PEG-13 ESTERS

2.5

A semi-synthetic emollient that softens skin but raises ethical and comedogenic concerns; rarely used in modern clean beauty.

Irritation

low

Source

semi-synthetic

beautyskincareemollient
Read ingredient review

Emollient

Mink Wax

Mink Wax

3.0

Mink wax is a natural emollient and thickener, but its use raises ethical concerns and may be comedogenic for some skin types.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Surfactant

Minkamide DEA

Minkamide DEA

2.5

Minkamide DEA is a foam booster from mink oil, but it's rarely used today due to ethical concerns and potential irritation.

Irritation

moderate

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Antistatic Agent

Minkamidopropalkonium Chloride

Minkamidopropalkonium Chloride

3.5

An effective conditioning ingredient that can improve hair manageability but may cause irritation or clog pores in sensitive individuals.

Irritation

moderate

Source

synthetic

beautyskincarehaircare
Read ingredient review

Surfactant

Minkamidopropyl Betaine

Minkamidopropyl Betaine

2.5

Minkamidopropyl Betaine is an effective mild cleanser, but its animal-derived source and moderate comedogenic risk make it less suitable for sensitive or acne-prone skin.

Irritation

low

Source

natural

beautyskincaresurfactant
Read ingredient review

Conditioning Agent

Minkamidopropyl Dimethylamine

Minkamidopropyl Dimethylamine

3.5

A gentle conditioning ingredient from mink oil that softens hair and skin, but may be comedogenic for some and raises ethical concerns due to animal sourcing.

Irritation

low

Source

natural

beautyskincarehaircare
Read ingredient review

Surfactant

Minkamidopropylamine Oxide

Minkamidopropylamine Oxide

3.5

A mild surfactant that boosts foam and adds a silky feel, but its animal-derived origin raises ethical and allergen concerns.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Emulsifier

Minoxapol 742

Minoxapol 742

3.8

Minoxapol 742 is a gentle synthetic emulsifier that helps mix water and oil in skincare, but may not suit ultra-sensitive skin at high levels.

Irritation

low

Source

synthetic

beautyskincarecleansing
Read ingredient review

Hair growth stimulant

Minoxidil Hyaluronamide

Minoxidil Hyaluronamide

3.5

An experimental hybrid that aims to combine minoxidil's hair-growth effects with hyaluronic acid's moisture, but clinical data on the combined molecule is very limited.

Irritation

moderate

Source

semi-synthetic

beautyskincarehair care
Read ingredient review

Hair growth stimulant

Minoxidil Oxothiazolidinecarboxylate

Minoxidil Oxothiazolidinecarboxylate

3.5

A newer minoxidil variant that may offer better scalp tolerance, but research is still limited compared to standard minoxidil.

Irritation

moderate

Source

synthetic

beautyskincarehair care
Read ingredient review

Hair growth stimulant

Minoxidil Succinoyl Oligopeptide-143

Minoxidil Succinoyl Oligopeptide-143

3.5

A novel peptide that aims to support hair growth with less irritation than traditional minoxidil, but clinical evidence is still limited.

Irritation

low

Source

synthetic

beautyskincarehair care
Read ingredient review

Antioxidant

Mint Bush Leaf Extract

Prostanthera Rotundifolia Leaf Extract

3.8

A gentle botanical extract with antioxidant potential, but research on its specific skin benefits is still limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Antioxidant

Mint Callus Culture Extract

Mentha Herba Callus Culture Extract

4.0

A lab-grown mint extract that offers antioxidant benefits without the variability of field-grown plants.

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review

Surfactant

MIPA C12-15 Pareth Sulfate

MIPA C12-15 Pareth Sulfate

3.5

A moderately gentle synthetic cleanser that effectively removes dirt and oil but may cause irritation for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincarecleanser
Read ingredient review

Buffering Agent

MIPA-Borate

MIPA-Borate

3.0

MIPA-Borate is a synthetic pH adjuster that helps keep products stable, but it has raised some safety concerns at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincarepH adjuster
Read ingredient review

Surfactant

MIPA-C12-14 Sec-Pareth-3 Acetate

MIPA-C12-14 SEC-PARETH-3 ACETATE

3.5

A mild synthetic surfactant that helps cleanse without stripping, but may cause irritation for very sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

MIPA-Cocoyl Sarcosinate

MIPA-Cocoyl Sarcosinate

4.0

A gentle, amino-acid-based surfactant that cleanses without stripping the skin, ideal for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

MIPA-Dodecylbenzenesulfonate

MIPA-Dodecylbenzenesulfonate

3.5

An effective but potentially drying surfactant that may irritate sensitive skin; best for normal to oily skin types in rinse-off formulas.

Irritation

moderate

Source

synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

MIPA-Laureth Sulfate

MIPA-Laureth Sulfate

3.5

A mild-to-moderate cleansing surfactant that can be drying for sensitive or dry skin types.

Irritation

moderate

Source

synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

MIPA-Lauryl Sulfate

MIPA-Lauryl Sulfate

3.5

A strong foaming cleanser that can be drying or irritating for sensitive skin, but is effective at removing oil and buildup.

Irritation

moderate

Source

synthetic

beautyskincarecleansing agent
Read ingredient review

Emollient

MIPA-Myristate

MIPA-Myristate

3.5

MIPA-Myristate helps products feel smooth and spread easily, but may clog pores or irritate sensitive skin for some users.

Irritation

moderate

Source

synthetic

beautyskincareemollient
Read ingredient review

Antioxidant

Mirabilis Jalapa Callus Extract

MIRABILIS JALAPA CALLUS EXTRACT

3.8

A gentle, plant-derived antioxidant 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

Mirabilis Jalapa Callus Powder

MIRABILIS JALAPA CALLUS POWDER

3.8

A gentle, plant-derived ingredient with antioxidant potential, but research on its specific skincare benefits is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Mirabilis Jalapa Extract

MIRABILIS JALAPA FLOWER/LEAF/STEM EXTRACT

3.5

A gentle botanical extract with antioxidant potential, but research on its cosmetic benefits is still limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Antioxidant

Mirabilis Jalapa Flower Extract

MIRABILIS JALAPA FLOWER EXTRACT

3.8

A gentle botanical extract with antioxidant and soothing potential, but research is limited and it's not a powerhouse ingredient.

Irritation

low

Source

natural

beautyskincarebotanical extract
Read ingredient review

Antioxidant

Mirabilis Jalapa Seed Extract

MIRABILIS JALAPA SEED EXTRACT

3.5

A gentle, plant-based extract with antioxidant potential, but more research is needed to confirm its benefits in skincare.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Miracle Fruit Extract

Synsepalum Dulcificum Fruit Extract

3.8

A gentle, antioxidant-rich plant extract that may help soothe skin and fight free radical damage, though research in cosmetics is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review