date:Jun 21, 2013
s we have shown in our coverage of this topic).
All of those studies, Reuters reported, are hampered by the fact that it's hard to isolate the effect of a single food in a person's diet on the risk of cancer.
Clinical trials are just about the only types of studies that are able to reveal evidence of cause-and-effect, where people are randomly selected to drink green tea in some form - or not at all. According to the National Cancer Institute, there have been few such studies.
Zheng and his t