Some beneficial substances can be counterproductive while you're on cancer therapy. Nothing suggests that green tea cures prostate cancer. Carlin's study used a strong concentration of active ingredients - about a hundred times what the Lipton company estimates is in one cup of tea. HUman studies are needed to see if indeed green tea extracts really can prevent cancer or slow the growth of existing tumors. Moderate consumption of green tea appears safe.
Preliminary evidence exists of the potential effectiveness of green tea as a treatment of cancer.
Further research into the effects of green tea and some of its constituents would be worthwhile. If drinking tea for refreshment makes sense to you, you may also want to learn more about balancing a low fat diet rich in vegetables and fruit, cereals, and soy milk and tofu. Green Tea A review by Elizabeth Kaegi, MB, ChB, MSc, onsite at Canadian Medical Association.