Green Tea Polyphenols (GTP) is a compound of polyhydroxy phenolic compounds in tea. It is composed of more than 30 phenolic substances. Its main component is catechins and their derivatives, that is also the active ingredients used in health care . Tea polyphenols have many physiological activities such as anti-oxidation, anti-radiation, anti-aging, lowering blood fat, lowering blood sugar, inhibiting bacteria and enzymes, etc.
Tea polyphenols are the main components that determine the color, aroma, taste and efficacy of tea, accounting for 20% to 30% of the dry weight of tea. Based on the chemical structure, tea polyphenols are divided into four categories: catechins, flavonoids, anthocyanins, and phenolic acids. Among them, catechins have the highest content, accounting for 60% to 80% of tea polyphenols. The catechins are mainly epicatechin (EC), epicatechin gallate (ECG), epigallocatechin (EGC) and epigallocatechin gallate (EGCG).The highest content of catechins in tea is EGCG, followed by ECG, and again EGC.
Latin Name: Camellia sinensis (L.) KuntzePart Used: Leaf
Specification: 10%-98% polyphenol
Appearance: Brownish yellow fine powder
Test Method: By UV
Molecular Formula: 281.36
Molecular Weight: C17H19N3O
CAS NO.: 84650-60-2
Physical and chemical propertie
Pure tea polyphenols are white amorphous crystalline substances while it turns light yellow to brown due to few GTP oxidative in extraction
Light tea frangrance and astringent taste
easily soluble in ethanol, methanol, and ethyl acetate, acetone, etc., slightly soluble in oil, insoluble in organic solvents such as benzene and chloroform
stable at pH 2-7, easy to oxidize and polymerize under light or pH>8.
good heat resistance, hygroscopicity, can produce green and black compounds with iron ions
As an excellent additive in cosmetics and daily necessities, tea polyphenols have the following significant effects: strong antibacterial effect (including skin and oral bacteria) and inhibition of oxidase (such as tyrosinase, glucose transfer of Streptococcus mutans) Enzymes, urinine decarboxylase, lipoxygenase, etc.), it can prevent and treat skin diseases, skin allergies, skin pigmentation and anti-wrinkle, anti-caries, dental plaque, periodontitis and bad breath.
At the same time, it can prevent the sun's rays from damaging the skin. In addition, it can also eliminate bad breath. Therefore, tea polyphenols can be used in cosmetics and daily necessities as antioxidants, preservation agents, anti-wrinkle agents, skin whitening agents, radiation protection agents, sunscreens and special cosmetic additives, etc., as well as in daily cosmetics, such as baths. Soap, bath lotion, shampoo, detergent, toothpaste, tooth powder, mouthwash, anti-halitosis, etc.
2. Regulate blood lipids
Tea polyphenols can more comprehensively adjust blood lipids, especially lower serum TG (triglycerides), TC (total cholesterol) and low-density lipoprotein cholesterol (LDL-C) content, and increase high-density lipoprotein. In addition, tea polyphenols are strong inhibitors of low-density lipoprotein oxidation, which can effectively inhibit the oxidative modification of LDL, and have a certain inhibitory effect.