i really dont understand what do scientist to prove, too much brain can cause damage i will not question about their studies about things but as far as i concern as long as i have gain the benefit of dringking tea i continue drinking.

can it really cause leukemia?
i drink about 5 to 10 cups of tea a day

Anyone here ever hear of the Asian Paradox? I don't believe this hype for a sec. Green tea has been the most powerful and the healthiest thing you could add to your lifestyle since ancient times. Oh and if there is danger from a supplement, well it is a supplement which is different then a cup of green tea. The article should be more specific about the actual topic being discussed here. If green tea affected medications (which it may) I think there would be a sign of it.

About leaf regular Tea I feel, the quantity and concentration is important if it has some effect on anxiety/ gastric. I fully endorse that green tea has to be well tested scientifically. I recently had green tea[plain as well as Tulasi], I suffered with severe gastric problems, it took a day to come down. This could be due to some hypertension related problems. I feel it is important that tea preparations like slim tea, Dr. tea, green tea should be tested by independent Nutritional agencies before they are allowed to market.