Coffee safety: Up to 5 cups daily may lower heart risk, according to a new scientific statement from the American Heart Association (AHA). Published July 20 in Circulation, the review confirms that up to 400 mg of caffeine per day—about five 8-ounce cups of black coffee—is safe for most adults and does not raise cardiovascular disease risk. The AHA also notes that moderate coffee intake may lower the risk of heart disease, stroke, and heart failure.
Dr. Gregory M. Marcus, chair of the statement, said that for most people, this amount is safe and does not increase cardiovascular risk. However, he warned against high doses from energy drinks, which contain much higher caffeine concentrations and may harm heart health. The review found that drinking two to four cups of black coffee daily is linked to lower risks of Type 2 diabetes, stroke, and heart failure, though more than four cups may increase heart failure risk in some individuals.
The effects of caffeine vary by genetics, age, and metabolism. While coffee safety is supported for most, some people may experience heart palpitations, anxiety, or sleep issues even at moderate doses. The AHA emphasized that ingredients like sugar and cream can change health outcomes, and most research focuses on coffee, not caffeine alone.
In conclusion, coffee safety guidelines from the AHA confirm that up to five cups daily can be part of a heart-healthy lifestyle for most adults. Individual responses differ, so it is best to monitor your body’s reaction and consult a healthcare provider.