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We are happy to offer more research confirming the benefits of green tea, our favourite drink. A study on rats with carcinoma of the mammary gland showed that the group treated with green tea catechins had a significantly higher survival rate and the mammary tumours were palpably smaller than the control group (Cancer Lett 83:149-156; 1994). In China, a population-based, case-control study of oesophageal cancer in urban Shanghai suggested a protective effect of green tea consumption. These findings are consistent with studies in laboratory animals, indicating that green tea can inhibit oesophageal carcinogenesis (J Natl Cancer Inst 86:855-858; 1994). In Japan, a study of 1,306 males who received the retirement health examination at the Self-Defense Forces Fukuoka Hospital between October 1986 and December 1988, showed serum total cholesterol levels were found to be inversely related to the consumption of green tea while no association was noted with serum triglycerides and high-density lipoprotein cholesterol. Adjusted mean concentrations of total cholesterol were 8 mg/dl lower in men drinking nine cups or more of green tea per day than in those consuming zero to two cups per day. (Prev Med 21:526-531; 1992). Another Japanese study found that "the main constituent of Japanese green tea, EGCG, is a practical cancer chemopreventive agent available in everyday life" (Prev Med 21:503-509; 1992). Further studies showed that i. "tea components possess antimutagenic and anticarcinogenic effects, and ... they ... protect humans against the risk of cancer by environmental agents" (Prev Med 21:351-360; 1992); ii. polyphenolic compounds from Japanese green tea have an anticaries effect (Caries Res 25:438-443; 1991); iii. EGC and EGCG isolated from green tea leaves, have been reported to prevent or diminish the occurrence of epileptic discharges induced by iron ions (Neurochem Res 17:585-590; 1992); iv. Long-term administration of EGCG extracted from green tea to mice prevented radiation-induced increase of lipid peroxides in the liver and significantly prolonged life span after lethal whole-body X-irradiation (Life Sci 50:147-152; 1992); v. extracts of Japanese green tea leaves inhibited the growth of various bacteria causing diarrhoeal diseases (Nippon Saikingaku Zasshi 44:669-672; 1989). Good news for drinkers of black tea though. Another study showed that black tea, green tea, decaffeinated black tea and decaffeinated green tea all had marked effects on inhibiting ultraviolet B light-induced skin carcinogenesis in mice. The effects of the green and black teas were comparable, with the decaffeinated versions slightly less effective (Cancer Res 54:3428-3435; 1994).