date:Oct 26, 2012
r all those differences - but, they write, it's not possible to perfectly account for everything.
If you want to start drinking green tea, it's considered safe in moderate amounts, says the National Center for Complementary and Alternative Medicine. But the tea and its extracts do contain caffeine, which some people may need to avoid.
Green tea also contains small amounts of vitamin K, which means it could interfere with drugs that prevent blood clotting, like warfarin. Since many older people