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Preventive Effects of Green Tea in Different Types of CancerBY: Ritu Choudhary | Category: Other | Submitted: 2010-10-23 20:41:37
Drink several cups of green tea per day or supplement you. Results from studies of populations living in areas at high risk of lung cancer, stomach or esophagus, indicate that regular green tea drinkers have lower incidence and lower mortality for these types cancer. Several studies have confirmed the benefits of green tea: Prostate cancer: A case-control study on over 1200 Canadian examined the relationship between prostate cancer, consumption of alcoholic and other beverages, including tea, coffee and cola. Of all beverages studied, only the tea showed that it could reduce the risk of prostate cancer. Digestive cancers: In a Chinese study on 930 people, consumption of green tea decreased the risk of colon, rectum and pancreas. More people consumed green tea had greater protection against cancers. In studies conducted by Roderick Oregon, consumption of green tea and black tea inhibited the formation and development of early pre-cancerous lesions in rats. The polyphenols in green tea can inhibit the activity of carcinogens such as nitrosamines, polycyclic aromatic hydrocarbons and heterocyclic amines. Skin Cancer: In animals, administration of extracts of green tea or black tea is effective in preventing cancers induced by chemical carcinogens or ultraviolet light. Oral cancer: Studies in humans have demonstrated the existence of a direct link between the preventive effects of tea and cancer. For six months, 59 patients with oral precancerous lesions were studied. Treatment includes a mixture of components of green tea and black tea, administered orally and applied directly to lesions, helped significantly improve the clinical signs and to inhibit the proliferation of precancerous cells. Lung cancer: The Japanese smokers reduce their risk of lung cancer by 45% by drinking green tea, this would explain that Japan has both the highest percentage of smokers in the industrialized world and the lowest rate of cancers lung. According to a Japanese study, consumption of large amounts of green tea at least 10 cups a day decreases dramatically the progression of already initiated cancer. Patients with lung cancer, green tea drinkers live an average of 3 years longer for men and 8 and a half years longer for women than those who drink less than 3 cups per day. In one experiment, administration of green tea reduces the number of spontaneous metastases to the lung. Green tea inhibits the formation of reactive carcinogens by blocking certain oxidation reactions producing an abnormal DNA. It inhibits the formation of such a stable product, 8-hydroxy-deoxyguanosine, a marker of oxidative damage to DNA. The researchers focused their attention on an important constituent of green tea, epigallocatechingallate. The ECGC is a catechin abundant in green tea, but absent in black tea. EGCG is known to be much more powerful than vitamin E against free radicals. Green tea slows cell proliferation, especially of abnormal cells that are usually found early in the disease, indicating that the cancer growth will be inhibited. EGCG inhibits the release of Tumor Necrosis Factor and reduces the activity of ornithine decarboxylase, biomarkers for cancers of the stomach and colon. It breaks up the DNA of the cancer cell, causing it to apoptosis. In green tea, there is a substance that inhibits an enzyme essential for tumor growth whose property is to degrade the surrounding tissue. The ECGC has shown cytostatic efficiency which inhibits cell multiplication. The events of the preventive effects of catechins or inhibitors reduce the number and size of tumors, decreased morbidity and prolongation of life of cancer patients. The polyphenols in green tea are active at all stages of cancer initiation, promotion and progression. They showed a protective effect on lung, gastrointestinal tract, pancreas, liver, skin, prostate, and breast cancer. Article Source: http://www.cancer-surgery.com/ About Author / Additional Info: Comments on this article: (0 comments so far)
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