Diet pills hard on the heart

... NEW YORK (Reuters Health) - Supplements that contain ephedra and caffeine-rich guarana, which may be used for weight loss, result in significant cardiovascular and metabolic changes, investigators have found. These changes could be harmful in people with high blood pressure, atherosclerosis (clogged arteries), or glucose intolerance, a precursor to diabetes marked by elevated blood sugar. All of these conditions are strongly associated with obesity. ...