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

Emulsifier

Laureth

Laureth

3.5

Laureth ingredients help blend oil and water in formulas, but some types can be mildly drying or irritating for sensitive skin.

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansingemulsifier
Read ingredient review

Surfactant

Laureth-1 Phosphate

LAURETH-1 PHOSPHATE

3.5

A mild, phosphate-based surfactant that helps cleanse without stripping the skin, but may not suit ultra-sensitive types.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-10

Laureth-10

3.5

A gentle cleansing and emulsifying ingredient that helps products rinse clean without stripping the skin, but may not suit those avoiding ethoxylated compounds.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-10 Carboxylic Acid

LAURETH-10 CARBOXYLIC ACID

4.0

A gentle, low-irritation cleansing ingredient that helps remove dirt and oil without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

Laureth-100

LAURETH-100

4.0

Laureth-100 is a gentle, high-foam surfactant and emulsifier that helps blend oil and water in cleansers and serums, with a very low irritation profile.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-11

Laureth-11

4.0

Laureth-11 is a gentle surfactant and emulsifier that helps cleanse without stripping the skin, making it a good choice for sensitive skin formulations.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-11 Carboxylic Acid

LAURETH-11 CARBOXYLIC ACID

4.0

A gentle, non-stripping surfactant that effectively cleanses while being kinder to the skin barrier than traditional sulfates.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

Laureth-12 Carboxylic Acid

LAURETH-12 CARBOXYLIC ACID

4.0

A gentle, semi-synthetic surfactant that helps cleanse without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

Laureth-12 Succinate

LAURETH-12 SUCCINATE

3.5

A gentle synthetic surfactant that helps cleanse without over-drying, but offers no active skincare benefits beyond cleaning.

Irritation

low

Source

synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

Laureth-13

LAURETH-13

3.5

Laureth-13 is a synthetic cleansing agent that helps products foam and rinse clean, but it can be drying or irritating for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-13 Carboxylic Acid

Laureth-13 Carboxylic Acid

4.0

A gentle, low-irritation surfactant that helps cleansers foam and remove dirt without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-14

Laureth-14

3.5

An effective cleansing agent that can strip the skin's natural oils if used too frequently or in high concentrations.

Irritation

moderate

Source

synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Laureth-14 Carboxylic Acid

LAURETH-14 CARBOXYLIC ACID

3.8

A gentle, effective surfactant that helps cleanse without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-15

Laureth-15

3.5

Laureth-15 is a synthetic emulsifier that helps products spread and foam, but it may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-16

Laureth-16

3.8

Laureth-16 is a gentle surfactant and emulsifier that helps products foam and rinse cleanly, but it may be slightly drying for very sensitive skin.

Irritation

low

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-17 Carboxylic Acid

LAURETH-17 CARBOXYLIC ACID

4.0

A gentle, semi-synthetic surfactant that helps cleanse without stripping the skin, making it a good choice for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-2

Laureth-2

3.8

A gentle surfactant that helps blend oil and water, making it a common but mild cleansing ingredient.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

Laureth-2 Acetate

Laureth-2 Acetate

3.8

Laureth-2 Acetate is a gentle synthetic surfactant that helps cleanse without over-drying, making it a good option for sensitive skin.

Irritation

low

Source

synthetic

beautyskincarecleansing
Read ingredient review

Emollient

Laureth-2 Benzoate

LAURETH-2 BENZOATE

3.8

A synthetic emollient that helps products feel silky and spread easily, with a low risk of irritation or clogged pores.

Irritation

low

Source

synthetic

beautyskincareemollient
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Emollient

Laureth-2 Ethylhexanoate

LAURETH-2 ETHYLHEXANOATE

4.0

A lightweight synthetic emollient that improves product texture and skin feel without clogging pores.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Surfactant

Laureth-2 Phosphate

LAURETH-2 PHOSPHATE

4.0

A gentle phosphate-based surfactant that helps cleanse without stripping the skin, making it a good choice for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-20

Laureth-20

3.8

Laureth-20 is a common cleansing and emulsifying ingredient that can be drying or irritating for sensitive skin, especially in high concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-23

Laureth-23

3.5

Laureth-23 is a reliable emulsifier but can be drying or irritating for sensitive skin at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-3

Laureth-3

4.0

A gentle cleansing agent that helps products foam and rinse clean without stripping the skin.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-3 Phosphate

LAURETH-3 PHOSPHATE

3.8

A gentle surfactant that helps cleanse without stripping the skin, but may not suit those with very sensitive or compromised barriers.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-38

Laureth-38

4.0

A gentle, non-ionic surfactant that helps cleanse without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-4

Laureth-4

3.5

Laureth-4 is an effective emulsifier and cleanser, but it can be moderately irritating and potentially pore-clogging for some skin types.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-4 Carboxylic Acid

Laureth-4 Carboxylic Acid

3.8

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

Irritation

moderate

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Laureth-4 Phosphate

Laureth-4 Phosphate

3.5

Laureth-4 Phosphate is a synthetic emulsifier that helps mix oil and water, but may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-40

LAURETH-40

3.5

A mild cleansing and emulsifying agent, but can be drying or irritating for sensitive skin at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-5

LAURETH-5

3.5

Laureth-5 is a mild cleansing and emulsifying agent, but may be slightly drying or irritating for sensitive skin at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Emulsifier

Laureth-5 Butyl Ether

LAURETH-5 BUTYL ETHER

3.5

Laureth-5 Butyl Ether is a synthetic emulsifier that helps mix oil and water in products, but it may cause mild irritation for sensitive skin.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-5 Carboxylic Acid

LAURETH-5 CARBOXYLIC ACID

4.0

A gentle, low-irritation surfactant that helps cleanse without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Laureth-50

Laureth-50

3.8

A gentle, large-molecule surfactant that cleanses without stripping the skin, but may not be ideal for those avoiding ethoxylated ingredients.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-6

Laureth-6

3.8

Laureth-6 is a gentle surfactant that helps cleansers foam and rinse cleanly, but it may be too drying for very sensitive or dry skin if used in high concentrations.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-6 Carboxylic Acid

Laureth-6 Carboxylic Acid

4.0

A gentle, effective surfactant that cleans without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Laureth-6 Citrate

Laureth-6 Citrate

4.0

Laureth-6 Citrate is a gentle, citrate-modified surfactant that helps cleanse and emulsify without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-7

Laureth-7

3.8

Laureth-7 is a mild surfactant and emulsifier that helps products spread and rinse cleanly, but it is not a star active ingredient for skin benefits.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-7 Citrate

Laureth-7 Citrate

4.0

A gentle surfactant that helps cleanse without stripping the skin, making it a good choice for sensitive or dry skin types.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

Laureth-7 Phosphate

LAURETH-7 PHOSPHATE

3.8

A gentle surfactant that helps cleanse without stripping the skin, but may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-7 Tartrate

Laureth-7 Tartrate

3.8

Laureth-7 Tartrate is a gentle surfactant that effectively cleanses without stripping the skin, making it a good choice for sensitive skin types.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-8

Laureth-8

3.5

Laureth-8 is a workhorse emulsifier that helps products spread and rinse clean, but it can be drying or irritating for sensitive skin in high concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-8 Carboxylic Acid

LAURETH-8 CARBOXYLIC ACID

4.0

A gentle, non-stripping surfactant that cleanses effectively without disrupting the skin barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing
Read ingredient review

Surfactant

Laureth-8 Phosphate

Laureth-8 Phosphate

3.5

Laureth-8 Phosphate is a mild, semi-synthetic surfactant that helps cleanse and emulsify without stripping the skin, but it may not suit those avoiding ethoxylated ingredients.

Irritation

low

Source

semi-synthetic

beautyskincaresurfactant
Read ingredient review

Surfactant

Laureth-9

Laureth-9

3.5

Laureth-9 is a common cleansing and emulsifying agent, but it can be drying or irritating for sensitive skin at higher concentrations.

Irritation

moderate

Source

synthetic

beautyskincaresurfactant
Read ingredient review

Cleansing Agent

Lauric Acid

Lauric Acid

4.0

Lauric acid is a natural fatty acid that helps cleanse skin and may have mild antimicrobial benefits, but it can be drying or irritating for sensitive skin.

Irritation

moderate

Source

natural

beautyskincarecleansing agent
Read ingredient review

Skin conditioning agent

Laurimino Bispropanediol

Laurimino Bispropanediol

3.8

A gentle synthetic conditioning agent that helps products feel smoother and less drying, but it's not a standout active ingredient.

Irritation

low

Source

synthetic

beautyskincareconditioning agent
Read ingredient review

Surfactant

Lauriminodipropionic Acid

Lauriminodipropionic Acid

4.0

A gentle, low-irritation surfactant that cleanses effectively without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Penetration Enhancer

Laurocapram

Laurocapram

3.5

Laurocapram is a synthetic ingredient that boosts absorption of other actives, but its use in consumer skincare is limited due to potential irritation and regulatory caution.

Irritation

moderate

Source

synthetic

beautyskincarepenetration enhancer
Read ingredient review

Surfactant

Lauroyl Alanine

Lauroyl Alanine

4.3

A mild, amino-acid-based surfactant that cleanses without stripping the skin barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleansing agent
Read ingredient review

Surfactant

Lauroyl Arginine

Lauroyl Arginine

4.3

A mild, amino-acid-based surfactant that cleanses without stripping the skin's natural moisture barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

Lauroyl Beta-Alanine

Lauroyl Beta-Alanine

4.3

A mild, amino-acid-based surfactant that effectively cleanses while respecting sensitive and dry skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

Lauroyl Collagen Amino Acids

SODIUM/TEA-LAUROYL COLLAGEN AMINO ACIDS

4.0

A gentle, amino-acid-based surfactant that cleanses effectively while being kind to sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review

Surfactant

Lauroyl Ethyl Glucoside

Lauroyl Ethyl Glucoside

4.5

A gentle, sugar-derived surfactant that effectively cleanses without stripping the skin barrier.

Irritation

low

Source

semi-synthetic

beautyskincarecleanser
Read ingredient review