Page 265 - Cosmetology

Tephrosia purpurea seed extract. There is a small amount of research showing this to have antioxidant
and anticancer properties when fed to rats, or in vitro, but there is no evidence that this effect can be
duplicated when applied topically on skin.

Terminalia catappa. Can be a potent antioxidant.

Terminalia sericea. May have antibacterial properties.

Terminalia sericea extract. This extract has anti-inflammatory and antibacterial properties, but there is no
research showing it to have any effect on the appearance of cellulite.

tetradibutyl pentaeriththrityl hydroxyhydrocinnamate. See antioxidant.

tetrahexyldecyl ascorbate. Stable form of vitamin C. See vitamin C.

Tetrahydrobisdemethoxycurcumin. Antioxidant and anti-inflammatory plant extract. See curcumin.

tetrahydrodemethoxycurcumin. See curcumin and turmeric.

Tetrahydrodiferuloylmethane. Antioxidant and anti-inflammatory plant extract. See curcumin.

Tetrahydromethoxycurcumin. Antioxidant and anti-inflammatory plant extract. See curcumin.

tetrasodium EDTA. A chelating agent. It is 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 and negatively affecting the formulation.

Thea sinensis extract. See green tea.

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

thiazolidine carboxylate. Can have antioxidant properties, but there is no research showing this to be the
case when it is applied topically on skin.

thickening agent. Substances that can have a soft to hard waxlike texture or a creamy, emollient feel, and
that can be great lubricants. There are literally thousands of ingredients in this category that give each and
every lotion, cream, lipstick, foundation, and mascara, as well as other cosmetic products, their distinctive
feel and form.

thioglycolate. Compounds used in permanent waves and depilatories either to alter the structure of hair or
to dissolve it. These are potent skin irritants.

thiotaurine. An amino acid. Potentially, it can have antioxidant properties for skin.

threonine. See amino acid.

Thuja occidentalis extract. Also known as extract of red or yellow cedar. It has antibacterial properties on
skin, but it also has constricting properties and can be a skin irritant.

thyme extract. Derived from the thyme plant. It can have potent antioxidant properties. Its fragrant
component can also cause skin irritation.

thyme oil. See thyme extract.

thymine. Component of DNA that carries genetic information for the cell. See DNA.

thymus extract. See thymus hydrolysate.

thymus hydrolysate. Form of animal thymus derived by acid, enzyme, or other methods of hydrolysis. It
can have water-binding properties for skin but has no other special or unique benefit.