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

Chelating Agent

Trisodium EDTA

Trisodium EDTA

4.0

A safe and effective stabilizer that helps your products stay fresh and work better by neutralizing unwanted metals.

Irritation

low

Source

synthetic

beautyskincarestabilizer
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Chelating Agent

Trisodium Ethylenediamine Disuccinate

TRISODIUM ETHYLENEDIAMINE DISUCCINATE

4.5

A gentle, biodegradable alternative to traditional chelating agents that protects your skincare formulas from metal-induced degradation.

Irritation

low

Source

synthetic

beautyskincarestabilizer
Read ingredient review

Humectant

Trisodium Fructose Diphosphate

Trisodium Fructose Diphosphate

4.0

A gentle, sugar-based humectant that hydrates skin and may help energize skin cells for a healthier appearance.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
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Soothing Agent

Trisodium Glycyrrhizate

Trisodium Glycyrrhizate

4.3

A gentle, licorice-derived salt that calms redness and irritation without the side effects of pure licorice extract.

Irritation

low

Source

natural

beautyskincaresoothing agent
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Chelating Agent

Trisodium HEDTA

Trisodium HEDTA

3.8

A gentle chelating agent that protects your skincare formulas from metal contamination, helping them stay effective longer.

Irritation

low

Source

synthetic

beautyskincarestabilizer
Read ingredient review

Chelating Agent

Trisodium Inositol Triphosphate

TRISODIUM INOSITOL TRIPHOSPHATE

4.0

A gentle chelating agent that helps protect your products from mineral-related instability and may offer mild antioxidant benefits for skin.

Irritation

low

Source

natural

beautyskincarechelating agent
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pH Adjuster

Trisodium Phosphate

Trisodium Phosphate

3.5

Trisodium phosphate is a synthetic pH adjuster that helps keep products stable, but it can be drying or irritating in high concentrations.

Irritation

moderate

Source

synthetic

beautyskincarepH adjuster
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Antioxidant

Trisodium Resveratrol Triphosphate

Trisodium Resveratrol Triphosphate

4.0

A stabilized, water-friendly version of resveratrol that offers antioxidant protection without the stability issues of the original compound.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Surfactant

Trisodium Sulfosuccinate

TRISODIUM SULFOSUCCINATE

3.8

A gentle, synthetic surfactant that effectively cleanses without the harshness of traditional sulfates, making it a good option for sensitive skin.

Irritation

low

Source

synthetic

beautyskincarecleansing
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Antioxidant

Tristaniopsis Laurina Leaf Extract

TRISTANIOPSIS LAURINA LEAF EXTRACT

3.8

A gentle, antioxidant-rich plant extract that may help calm skin and defend against environmental stress, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Emollient

Tristearin

Tristearin

4.0

Tristearin is a gentle, plant-derived emollient that softens skin and gives creams a smooth, luxurious feel without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Tristearyl Citrate

TRISTEARYL CITRATE

4.0

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

Irritation

low

Source

natural

beautyskincareemollient
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Emulsifier

Tristearyl Phosphate

TRISTEARYL PHOSPHATE

3.8

A synthetic emulsifier that helps blend oil and water in creams and lotions, generally considered safe and non-irritating.

Irritation

low

Source

synthetic

beautyskincareemulsifier
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Soothing Agent

Triteleia Ixioides Extract

TRITELEIA IXIOIDES EXTRACT

3.5

A gentle botanical extract with potential soothing and antioxidant benefits, though research is limited.

Irritation

low

Source

natural

beautyskincarebotanical extract
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Emollient

Triundecanoin

Triundecanoin

4.0

Triundecanoin is a lightweight, non-greasy emollient that hydrates and softens skin without clogging pores, making it a good choice for sensitive and acne-prone skin.

Irritation

low

Source

synthetic

beautyskincareemollient
Read ingredient review

Antioxidant

Trolox

TROLOX

3.8

Trolox is a synthetic antioxidant that mimics vitamin E, helping to neutralize free radicals and support skin health, but it's less common in consumer products than natural vitamin E.

Irritation

low

Source

synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Troloxoyl Decapeptide-10

Troloxoyl Decapeptide-10

4.0

A promising synthetic peptide-antioxidant hybrid that may help protect and firm skin, but human studies are still limited.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Skin-conditioning agent

Troloxoyl Decapeptide-18

TROLOXOYL DECAPEPTIDE-18

3.8

A synthetic peptide that may help brighten under-eye circles by combining antioxidant and peptide actions, though human studies are limited.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Troloxoyl Nonapeptide-38

Troloxoyl Nonapeptide-38

3.8

A lab-made peptide paired with an antioxidant that may help smooth fine lines, but human studies are still limited.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Troloxoyl Oligopeptide-143

Troloxoyl Oligopeptide-143

3.8

A lab-made peptide that may help smooth wrinkles and improve skin firmness, but human studies are still limited.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Antioxidant

Troloxoyl Oligopeptide-33

Troloxoyl Oligopeptide-33

3.8

A lab-made peptide fused with an antioxidant that may help protect skin from environmental stress and support a smoother appearance, though human studies are still limited.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

pH Adjuster

Tromethamine

Tromethamine

4.0

Tromethamine is a safe, effective pH adjuster that helps keep your skincare products gentle and stable.

Irritation

low

Source

synthetic

beautyskincarepH adjuster
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Buffering Agent

Trona

TRONA

3.5

Trona is a gentle mineral salt that helps keep product pH stable, but it offers no direct skin benefits beyond formulation support.

Irritation

low

Source

natural

beautyskincarepH adjuster
Read ingredient review

Antioxidant

Tropical Pitcher Plant Extract

Nepenthes Mirabilis Pitcher Extract

3.8

A gentle plant extract with antioxidant potential, but research is limited and benefits are not yet proven in human studies.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tropolone

Tropolone

3.8

Tropolone is a gentle antioxidant that helps protect skin from environmental damage and may support product stability.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Troxerutin

Troxerutin

4.0

Troxerutin is a gentle antioxidant that may help calm redness and support skin resilience, but more human studies are needed to confirm its anti-aging benefits.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidant
Read ingredient review

Antioxidant

Truffle Extract

Tuber Magnatum Extract

3.8

A trendy, antioxidant-rich extract that may help protect skin from environmental stress, but research is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Skin-conditioning agent

Trypanosoma Cruzi Polypeptide-1

R-TRYPANOSOMA CRUZI POLYPEPTIDE-1

2.5

A novel synthetic peptide with very limited research in cosmetics; its benefits are not well-established for everyday skincare.

Irritation

low

Source

biotech

beautyskincarepeptide
Read ingredient review

Exfoliant

Trypsin

Trypsin

3.8

Trypsin is an enzyme exfoliant that gently dissolves dead skin cells, but it can be irritating if left on too long or used too frequently.

Irritation

moderate

Source

natural

beautyskincareexfoliant
Read ingredient review

Humectant

Tryptophan

TRYPTOPHAN

3.8

Tryptophan is a gentle amino acid that helps hydrate skin and defend against environmental stress, but it's not a standout ingredient on its own.

Irritation

low

Source

natural

beautyskincarehumectantantioxidant
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Antioxidant

Tschonoski Hornbeam Leaf Extract

Carpinus Tschonoskii Leaf Extract

3.8

A gentle, plant-derived antioxidant that may help calm skin and defend against environmental stress, though research is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tschonoskii Hornbeam Stem Extract

Carpinus Tschonoskii Stem Extract

3.8

A gentle, plant-based antioxidant extract that may help protect skin from environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tuberose Callus Extract

Polianthes Tuberosa Callus Extract

3.8

A gentle, antioxidant-rich extract from tuberose callus that may help calm skin and fight free radicals, but research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tuberose Flower Extract

Polianthes tuberosa flower extract

3.8

A gentle botanical extract that adds a pleasant floral scent and mild antioxidant benefits to skincare formulas.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Tuberose Flower Oil

POLIANTHES TUBEROSA FLOWER OIL

3.8

Tuberose flower oil adds a luxurious floral scent to products but may cause irritation in sensitive skin and has limited research on skin benefits beyond fragrance.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Emollient

Tuberose Flower Wax

POLIANTHES TUBEROSA FLOWER WAX

4.0

Tuberose flower wax is a natural, fragrant wax that softens and protects the skin while adding a subtle floral scent to products.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Tucuma Fruit Oil

Astrocaryum vulgare fruit oil

4.3

A lightweight, non-greasy Amazonian oil that deeply moisturizes and protects skin with essential fatty acids and antioxidants.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Tucuma Kernel Oil

Astrocaryum vulgare kernel oil

4.3

A lightweight, non-greasy plant oil that deeply moisturizes and helps restore the skin barrier without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Tucuma Seed Butter

Astrocaryum Tucuma Seed Butter

4.0

A nourishing, plant-based butter that deeply moisturizes without clogging pores, ideal for dry or sensitive skin.

Irritation

low

Source

natural

beautyskincareemollient
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Emollient

Tucuma Seed Oil

Astrocaryum Tucuma Seed Oil

4.3

A rich, non-greasy Amazonian oil that deeply moisturizes and softens skin without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Antioxidant

Tulip Bulb Extract

Tulipa Kaufmanniana Bulb Extract

3.5

A gentle botanical extract with antioxidant potential, but research is limited and benefits are not well-established.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tulip Callus Culture Extract

Tulipa Gesneriana Callus Culture Extract

3.8

A gentle, lab-grown tulip extract that may help protect skin from environmental stress, but research is still early.

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review

Antioxidant

Tulip Flower Extract

TULIPA HYBRID FLOWER EXTRACT

3.5

Tulip flower extract is a gentle antioxidant that may help calm skin, but research is still early and it's not a standout ingredient.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Fragrance

Tulip Flower Water

TULIPA GESNERIANA FLOWER WATER

3.5

A gentle, lightly fragrant floral water that adds a subtle botanical touch to skincare, but with limited research on specific skin benefits.

Irritation

low

Source

natural

beautyskincarebotanical
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Antioxidant

Tulip Phytoplacenta Extract

Tulipa Gesneriana Phytoplacenta Extract

3.5

A trendy botanical extract with promising antioxidant potential, but currently lacks robust human studies to back its placenta-like claims.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Skin conditioner

Tulip Tree Leaf Water

Liriodendron tulipifera leaf water

3.5

A gentle, aromatic botanical water that may offer mild antioxidant and soothing benefits, but lacks robust clinical research.

Irritation

low

Source

natural

beautyskincarebotanical water
Read ingredient review

Emollient

Tulip Tree Leaf Wax

Liriodendron Tulipifera Leaf Wax

4.0

A gentle, plant-derived wax that helps lock in moisture and gives products a smooth, creamy feel without clogging pores.

Irritation

low

Source

natural

beautyskincareemollient
Read ingredient review

Soothing Agent

Tulipalin A

Tulipalin A

3.5

Tulipalin A is a plant-derived compound with early research suggesting anti-inflammatory benefits, but its use in skincare is still emerging and requires caution due to potential irritation.

Irritation

moderate

Source

natural

beautyskincaresoothing agent
Read ingredient review

Antioxidant

Tulipalin B

Tulipalin B

3.5

Tulipalin B is a plant-derived compound with promising antioxidant and anti-inflammatory properties, but research is still early and it may cause irritation in sensitive skin.

Irritation

moderate

Source

natural

beautyskincareantioxidant
Read ingredient review

Colorant

Tungsten Oxide

TUNGSTEN OXIDE

2.5

Tungsten oxide is a safe colorant used in small amounts for tinting cosmetics, but it offers no skincare benefits.

Irritation

low

Source

synthetic

beautyskincarecolorant
Read ingredient review

Firming Agent

Turkestanica Extract

Ajuga Turkestanica Extract

4.0

A botanical extract that may help improve skin firmness and reduce the appearance of fine lines, with generally low irritation risk.

Irritation

low

Source

natural

beautyskincarebotanical
Read ingredient review

Antioxidant

Turkestanica Flower Extract

Ajuga Turkestanica Flower Extract

3.8

A gentle plant extract with antioxidant potential, best for soothing sensitive skin, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
Read ingredient review

Antioxidant

Turmeric Callus Culture Extract

Curcuma Longa Callus Culture Extract

4.0

A lab-grown turmeric extract that offers antioxidant protection and soothing benefits without the strong color or scent of whole turmeric.

Irritation

low

Source

biotech

beautyskincareantioxidant
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Antioxidant

Turmeric Callus Extract

Curcuma Longa (Turmeric) Callus Conditioned Media

4.0

A lab-grown turmeric extract that offers antioxidant and soothing benefits without the strong color or scent of traditional turmeric.

Irritation

low

Source

biotech

beautyskincareantioxidant
Read ingredient review