teaA meta-analysis was published in Stroke (2009 May 40(5)1786-92) looked at the effect tea drinking has on the risk for stroke. A meta-analysis is a study that looks at the results of several other studies covering the same topic. Nine studies were reviewed, involving a total of 195,965 participants. A total of 4,378 people had strokes during the course of these studies. Researchers found that those who consumed at least three cups of tea per day were 21% less likely to have a stroke than the participants who drank one cup of tea or less each day.