4. Researchers found no link between a woman's coffee intake and her risk of from heart attack, stroke or any other cause. And that was true even of women who downed four or more cups per day. "Our results suggest that coffee drinking is OK for patients with cardio ascular disease, but it would be desirable to replicate our results in other populations," lead researcher Dr. Esther Lopez-Garcia, of Universidad Autonoma de Madrid in Spain, told Reuters Health in an email.