“It may not be the caffeine in coffee that raises blood pressure because drinking decaffeinated coffee has a similar effect, Swiss researchers said yesterday.

In an article in the American Heart Association’s journal Circulation, the researchers said there may be another ingredient in coffee that causes blood pressure to rise. They found that coffee, caffeinated or not, raises the blood pressure of people who do not regularly drink it.” Boston Globe In habitual drinkers (of either caffeinated or decaf), the body adapts and the hypertensive effect is not sustained.