talc

Naturally occurring silicate mineral (any group of substances containing negative ions composed of...

tallow

Substance extracted from the fatty deposits of animals, especially from suet (the fat of cattle and...

tamanu oil

From a tree native to Polynesia. It is reputed to have wondrous skin-restoring properties, as well…

Tanacetum parthenium

tangerine oil

Fragrant, volatile citrus oil that can be a skin sensitizer…

tannic acid

Polyphenol that's considered a very good antioxidant…

tapioca starch

A natural thickener and texture enhancer derived from the roots of Manihot...

tartaric acid

Tartaric acid is a naturally-occurring crystalline organic acid found in many plants, including grapes and tamarinds.

TEA

TEA-lauryl sulfate

While there is abundant research showing sodium lauryl sulfate is a sensitizing cleansing agent,...

tea tree oil

Also known as Melaleuca, from the name of its native Australian plant source, Melaleuca alternifolia.

terephthalylidene dicamphor sulfonic acid

Terminalia chebula fruit extract

Terminalia chebula is an Ayurvedic plant extract that’s native to South Asia, where it’s known as “The King of Medicine”.

tetradibutyl pentaerithrityl hydroxyhydrocinnamate

tetrahexyldecyl ascorbate

Tetrahexyldecyl ascorbate is a stable form of vitamin C that is considered an analogue of L-ascorbic acid. Unlike pure vitamin C...

tetrahydrobisdemethoxycurcumin

Antioxidant and skin-soothing plant extract.

tetrahydrobisdemethoxydiferuloylmethane

A synthetic antioxidant derived from curcumin.

tetrahydrodemethoxycurcumin

tetrahydrodemethoxydiferuloylmethane

A synthetic antioxidant that provides the effects of the antioxidant curcumin but...

tetrahydrodiferuloylmethane

Antioxidant and skin-soothing plant extract.

tetrahydromethoxycurcumin

Antioxidant and skin-soothing plant extract.

tetrahydroxypropyl ethylenediamine

tetrapeptide-30

Tetrapeptide-30 is a peptide that targets the appearance of discolorations and uneven skin tone.

tetrasodium EDTA

Chelating agent used to prevent minerals present in formulations from bonding to other ingredients.

tetrasodium etidronate

Used as a chelating agent in cosmetics to prevent varying mineral components from binding together...

tetrasodium glutamate diacetate

A safe synthetic chelating agent with natural origins. Used in amounts up to 1% to boost the effectiveness of preservatives, allowing for the use of lower amounts than is typical without compromising effectiveness.

Theobroma cacao seed butter

thiamine HCL

Vitamin B1. There is no research showing this to be effective when applied topically on skin.

thickening agent

Substances that can have a soft to hard waxlike texture or a creamy, emollient feel, and that can...

thioctic acid

An enzyme that, when applied topically, offers beneficial antioxidant properties to help overcome aging factors and visible signs sun damage.

thiodipropionic acid

Acid-based synthetic antioxidant. There is no research pertaining to its benefit for skin, but in...

thiotaurine

Amino acid. Potentially, it can have antioxidant properties for skin...

threonine

thyme extract

Extract derived from the leaf or flower of the thyme plant. It can have potent antioxidant...

thyme oil

The most concentrated part of the thyme plant, and a source of antioxidants, some of which...

thymus hydrolysate

Form of animal thymus derived by acid, enzyme, or other methods of hydrolysis. It can have...

Thymus serpillum extract

Extract of wild thyme.

Thymus vulgaris

Thymus vulgaris oil

Thymus vulgaris oil is more commonly known as thyme oil.

Tilia cordata

titanium dioxide

Inert earth mineral used as a thickening, whitening, lubricating, and sunscreen ingredient in...

tocopherol

tocopherol acetate

tocopheryl acetate

tocopheryl lineolate

tocotrienols

Potent forms of vitamins E that are considered stable and powerful antioxidants. These forms of...

tomato extract

Extract that has weak antioxidant properties...

tormentil extract

Plant that can be irritating due to its tannin content, which causes skin constriction.

tragacanth

Natural gum used as a thickener in cosmetics.

tranexamic acid

A synthetic amino acid that functions as a skin-conditioning agent and astringent.

trehalose

Plant sugar that has hydrating properties for skin.

tremella fuciformis sporocarp extract

tribehenin

Also known as glyceryl tribehenate, a skin-conditioning agent that is a mixture of glycerin and...

tribehenin PEG-20 esters

A complex mixture of tribehenin and PEG-20, this ingredient has multiple functions in cosmetic...

tricaprylin

Mixture of glycerin and caprylic acid. Has emollient properties and is used as a skin-softening...

trideceth-12

Trideceth-12 is a synthetic mixture of a fatty alcohol (tridecyl alcohol) and polyethylene glycol that functions as an emulsifier and cleansing agent.

trideceth-6

An emulsifier, meaning it helps keep unlike ingredients (such as oil and water) from separating in an emulsion...

tridecyl salicylate

Salt form of salicylic acid (BHA). When it is no longer an acid (as in this case), salicylic acid...

tridecyl stearate

Offers skin conditioning and emollient properties. Can also be included in formulas as a thickening agent.

tridecyl trimellitate

Skin-softening agent and texture enhancer that can provide a cushiony, emollient feel.

triethanolamine

Used in cosmetics as a pH balancer. Like all amines, it has the potential for creating...

triethoxycaprylylsilane

Silicone that functions as a binding agent and emulsifier. 

triethoxycaprylylsilane crosspolymer

A silicone polymer used to enhance a product's texture.

triethoxysilylethyl polydimethylsiloxyethyl hexyl dimethicone

A silicone polymer that has multiple functions in cosmetic products, including skin and hair softening and as a texture enhancer.

triethylhexanoin

Triethylhexanoin is a synthetic mixture of glycerin and a fatty acid that functions as a solvent, occlusive, and skin-conditioning ingredient.

Trifolium pratense

triglyceride

Used as an emollient and thickening agent in cosmetics.

trigonella foenum-graecum seed extract

Latin name for the fenugreek plant. The seeds are used most often, and their fiber content helps...

trihydroxystearin

A mixture of glycerin and castor oil-derived fatty acids that is used in amounts between 1–7% as an emollient and thickening agent.

triisocetyl citrate

A trimester of the fatty alcohol isocetyl alcohol and citric acid. It is used as on occlusive agent.

trilaurin

Group of ingredients that are triesters of glycerin and aliphatic acids, and known generically as...

trimethylsiloxyamodimethicone

Trimethylsiloxyamodimethicone is a synthetic silicone-based polymer that functions as a conditioning agent, hydrating and smoothing skin’s surface due to its lightweight yet silky, non-greasy feel.

trimethylsiloxysilicate

Used as a skin-softening and occlusive agent.

trioclanolin

Derived from lanolin and used as a texture enhancer, most commonly in powder-based products such as...

trioctanoin

Used as an emollient and thickening agent in cosmetics.

trioctyldodecyl citrate

Mixture of octyldodecanol and citric acid used as a skin-softening agent and emollient.

tripeptide-1

Tripeptide-1, aka GHK (glycine, histidine, lysine - the amino acids that comprise it), is a synthetic signal peptide that teaches skin to rebuild damaged areas.

tripeptide-29

Tripeptide-29 is a synthetic peptide consisting of amino acids glycine and proline plus hydroxyproline (an amino acid derivative) shown to improve uneven texture and the look of fine lines.

tripeptide-32

A synthetic peptide with the "tri" (meaning three) designation referring to this peptide's mix of the amino acids proline, serine, and threonine.

Tripleurospermum maritimum extract

Also known as false mayweed or sea mayweed, this plant extract encompasses the entire plant. Raw material...

trisodium EDTA

Used as a water-softening and chelating agent (a compound that binds and separates metals, keeping them from bonding to other ingredients).

Triticum vulgare (wheat) germ extract

Extract from the germ portion of the wheat plant. In cosmetics, this ingredient functions as a...

Triticum vulgare germ oil

Non-fragrant plant oil that imparts emollience and delivers beneficial compounds including skin-replenishing squalane.

troxerutin

A flavonoid ingredient that's extracted from the Japanese plant Sophora japonica.

tryptophan

turmeric

Turmeric is a spice made from the dried, ground root of the Curcuma longa plant.