Van der Schouw and colleagues used a questionnaire to evaluate coffee and tea consumption among 37,514 participants. They followed the participants for 13 years for occurrences of cardiovascular disease and death.

Study limitations included self-reported tea and coffee consumption, and the lack of specific information on the type of tea participants drank. However, black tea accounts for 78 percent of the total tea consumed in The Netherlands and green tea accounts for 4.6 percent. Coffee and tea drinkers have very different health behaviors, researchers note. Many coffee drinkers tend to also smoke and have a less healthy diet compared to tea drinkers.

Researchers suggest that the cardiovascular benefit of drinking tea may be explained by antioxidants. Flavonoids in tea are thought to contribute to reduced risk, but the underlying mechanism is still not known.

Source: American Heart Association