Of all the controversial claims about green teas health benefits, the one that draws the most scepticism is the claim that it could be a cure for cancer. While it is almost certainly not a cure, however, many studies appear to show that lifelong green tea drinking does in fact reduce the risk of cancer in later life.
The biggest piece of evidence in support of this theory is known as the Asian paradox. The Asian paradox, according to researchers at Yale, is that Asia has very high levels of cigarette smoking, yet lower cancer rates than Europe or America. The researchers believe that the difference between the places lies in the Asians consumption of large amounts of green tea (over a litre a day on average).
Other studies have supported this view: one study comparing elderly Japanese people who drank green tea with ones who didnt found that the green tea drinkers tended to live a few years longer. Studies at Murcia University in Spain found that a chemical in green tea called EGCG is very similar to the cancer drug methotrexate, in that it appears to kill cancer cells in the same way. This is some of the most encouraging research yet, as methotrexate is a drug...