It is a kind of natural compound extracted from the green tea, with 30 polyphenois variety. According to its chemical structure, it is classified into catechins, flavone and flavonol, anthocyanidin, phenolic acid and condensed phenolic acid. The content of catechins is the highest, reaching 60-80% of tea polyphenols. Catechins is also divided into many variety.
Physical properties: light-green powder or light yellow soluble in water or alcohol.
Stability:stable in PH4-8. easy to oxidize in the conditions such as strong alkali, acid , light ,high temperature and interim metals.
Safety evaluation: non-toxicity
Storage: keep in shady, dry places with good ventilation condition and avoiding light.

Application:

a.      Work as antioxidant. The tea polyphenols is the natural grease antioxidant, it's anti-oxidant activation is superior to BHT and BHA, also superior to vitamin E too, it is widely applied in food industry to prevent and delay the lipid from oxidation or spoilage.

Operating method: (1) take 0.02~0.05% of tea polyphenols powder or extractive material of tea polyphenols that is equivalent to 0.02~0.05%. (2) Compound into 10% of the tea polyphenols solution and mix again evenly with water or the alcohol of 10% first. (3) If it is the meat product, which needs cooking or soaking, please compound the cook water (soak water) into tea polyphenols solution of 0.1% .

b.      Work as color fixative: Tea polyphenols takes effect on the pigment and vitamin in the food, it can prevent the food from fading and improve the stability.

Operating method: Add 0.005~0.01% of tea polyphenols in fruit juice, it can suppress the degradation of vitamin a , vitamin b and β- carotene from destroy, protect the nutrition of the fruit drink effectively. Add 0. 02% of the tea polyphenols can stop bad smell appear in the mandarin orange juice.

a.      Reduce blood fat, anti cardiovascular diseases, reduce blood sugar, and treat diabetes mellitus.

In recent years, there have been already nearly 10 companies taking tea polyphenols as essential component for cardiovascular drug, and have obtained the medicines license. Indicated by clinical experiments of several large hospitals in Tianjin, Beijing, Shanghai and other places, tea polyphenols really has obvious curative effect on preventing and curing high blood fat, cerebral thrombosis, atherosclerosis, etc.

b. Anticancer, anti-radiation, anti-radiation and increase leucocyte

c. The tea polyphenols not only can stop many kinds of carcinogen such as nitrite from compounding, but also can kill and wound the cancer cell directly and improve the immunity of organism; and the effective rate is more than 90% when tea polyphenols is used to treat the slight radiation sickness caused by chemotherapy, and more than 80% when it is used to treat cytopenia.

d. Antivirus, allergy resistant, anti inflammation, detoxifying

In our country, many medical units use tea extracts such as tea polyphenols to treat chronic dysentery and amoebic dysentery, the cure rate reaches more than 90%, clinically indicates: tea polyphenols has obvious restrain and kills function on the pathogen and virus, besides, it has obvious effect on anti-inflammation and stopping diarrhea.

e. Oxidation resisting, prevent aging

Tea polyphenols can remove redundant free radical from the human body and prevent aging. It indicates from a large number of experiments that the anti-oxidant activation of tea polyphenols is even stronger than vitamin E, if cooperated with vitamin C and vitamin E, it will have even stronger effect.

Used for deodorizing and preventing caries. Tea polyphenols has good such function as deodorizing and suppressing caries, dermatophyte, mouth germ, etc. and widely used in the chewing gum, toothpaste, halitosis-defending pharmaceuticals, water that for rinsing mouth, etc.

Used for antisepsis, the free hydroxyl of tea polyphenols can be combined with the protein and amino acid, thus precipitate the tropina, make it denature and deactivate, meanwhile, the tea polyphenols can make wound heal and resist disease from outside germ to invade.

Used for preventing ultraviolet radiation, radiation and ionizing radiation. The flavonoid material of tea polyphenols has rather strong absorption peak in ultraviolet region of 250~350nm, it is really a good ultraviolet radiation filter. Now, the tea polyphenols has been widely applied in soap, bath foam, shampoo, skin care products, etc.