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People who drink one or more cups of caffeinated coffee per day have a lower risk of heart failure, according to an analysis of studies of more than 21,000 Americans, led by the University of Colorado Anschutz Medical School in Aurora. Deaths from heart disease were also lower among coffee drinkers. The lowest risk was found among people who drank 2 cups of coffee daily. However, individual risk can vary, depending upon other lifestyle factors.