how many cups of coffee is unhealthy
in a study of about 130000 kaiser permanente health plan members people who reported drinking 1 3 cups of coffee per day were 20 % less likely to be hospitalized for abnormal heart rhythms arrhythmias than nondrinkers regardless of other risk factors and for women coffee may mean a lower risk of stroke in 2009 a study of 83700 nurses enrolled in the long term nurses health study showed a 20 % lower risk of stroke in those who reported drinking two or more cups of coffee daily compared to women who drank less coffee or none at all