But Human Trials Are Less Clear
Studies done outside of the laboratory, on human subjects, are less clear-cut about green tea’s abilities as an anti-cancer agent. There could be many explanations for this discrepancy, such as the compounds in green tea interacting with cancer drugs or the concentrations in laboratory studies being much higher than in human studies (after all, you can only drink so much green tea).
So as of right now, bodies like Cancer Research UK and the American Cancer Association do not take a stance as to whether or not someone should drink green tea as part of an anti-cancer regimen. There isn’t enough research yet for them to issue an authoritative, conclusive opinion.