Green Tea Prevents Cancer?

Green-tea extract may guard against oral cancer, according to the American Association for Cancer Research. Scientists at the University of Texas gave volunteers three different levels of green-tea extract for three months, and measured the response of pre-cancerous mouth lesions. They found that 59 percent of people consuming the highest level of extract had a positive response, compared to 18 percent in the placebo group. Researchers are encouraged by this study, but say the trial was too small to make any definite claims about cancer prevention. The amount of green-tea extract participants consumed was equivalent to eight to 10 cups of brewed tea per day.