A new American Heart Association scientific statement concludes that up to about 400 milligrams a day, or roughly three to five cups of plain coffee, is safe for most adults and may be linked to lower risks of cardiovascular disease. The benefits appear to depend heavily on the source and preparation, with coffee and tea looking more favorable than energy drinks, and added sugar, cream, syrups, or sweeteners potentially canceling out the upside. ScienceAlert reports: "Caffeine consumed in coffee is a key part of daily life for millions of people," says Gregory Marcus, cardiologist at the University of California, San Francisco, and Chair of the AHA volunteer writing group behind the statement. "In our review of the most recent research, for most adults, intake of up to 400 milligrams of caffeine per day, the equivalent of up to five cups of caffeinated coffee per day without added sugars or fillers, is safe and does not increase cardiovascular risk."
The statement focused on caffeine's relationship with cardiovascular risk factors, such as blood pressure and diabetes, as well as types of cardiovascular disease, including arrhythmias, coronary artery disease, stroke, and heart failure. The picture that emerges is complicated, but generally positive. [...] All up, the new AHA statement concludes that there's a growing body of evidence that caffeine isn't harmful when taken in moderation, and that coffee specifically may be beneficial. The statement was published in the journal Circulation.
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