Three heart studies, including the well-known Framingham Heart Study, show that drinking more caffeinated coffee can reduce the risk of heart failure.
Researchers studied more than 21,000 people over a ten-year period and found that those who drank at least one cup of coffee a day decreased their heart failure risk by 5-12% per cup of coffee. Yet, coffee and caffeine are often considered bad for the heart because they're associated with high blood pressure and heart palpitations. Heart experts say there's not enough evidence to recommend drinking more coffee, but there's plenty of evidence that smoking cessation, losing weight and exercising reduces the risk of heart disease.