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Many medical �discoveries� have occurred quite by happenstance. For instance, consider the story of Green Tea which began some 5,000 years ago when, as Chinese legend has it, leaves from a nearby Camellia sinensis tree fell into an emperor�s boiling pot of water. The leaves turned the water a light-brown color and gave off a delightful aroma. The emperor, upon taking a sip, found it also had an excellent taste and proclaimed it as �heaven sent.� Since then, the delectable brew has been considered a health-promoting beverage in China; used to treat everything from headaches to depression.
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Today, a wealth of studies has provided hard evidence for its positive effects on health. Drinking green tea is reputed to promote heart health, lower high cholesterol levels, lessen free radical damage to cells, fight obesity, inhibit the abnormal formation of blood clots, and slow the progression of age-related cognitive impairment and Alzheimer�s disease. Researchers now say that certain compounds in green tea may actually slow the progression of prostate cancer, a disease that kills more men each year in the United States than any cancer other than lung cancer.
Previous studies have shown that green tea may be linked to a reduced incidence of prostate cancer, and its polyphenols have been regarded as a potential cancer therapy. But last year, the FDA announced that the evidence for green tea benefits was inconclusive, because people consume relatively small quantities. So, Dr. James Cardelli, and his colleagues at Louisiana State University Health Sciences Center in Shreveport, carried out a clinical trial to determine the effects of short-term supplementation with increased amounts of the active compounds in green tea on the progression of prostate cancer.
The small study consisted of 26 men between 41 and 68 years of age who had been diagnosed with prostate cancer and were scheduled for radical prostatectomy. The men were put on a daily dose of four capsules containing a total of 1.3 grams of polyphenon E, equivalent to about 12 cups of normally brewed concentrated green tea, for 12 to 73 days (with an average time of 34.5 days), until the day before surgery. Blood tests showed a significant reduction in serum levels of three biomarkers associated with the growth and spread of prostate cancer: hepatocyte growth factor (HGF), vascular endothelial growth factor (VEGF), and prostate specific antigen (PSA).
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