Five cups of coffee a day may be safe for most adults, says American Heart Association

Published 21 July 2026 · us

Coffee drinkers may have less reason to worry about their daily habit after a new American Heart Association scientific statement said that up to 400

Coffee drinkers may have less reason to worry about their daily habit after a new American Heart Association scientific statement said that up to 400 milligrams of caffeine a day — roughly equivalent to five 8-ounce cups of coffee — is generally safe for most adults. American Heart Association: Five cups of coffee a day is fine for most adults The statement, published in the journal Circulation, examines the relationship between caffeine and cardiovascular health. It concludes that moderate consumption of caffeinated coffee is not generally linked to increased cardiovascular risk for most people and may be associated with a lower risk of several conditions, including coronary artery disease, stroke and heart failure. Also Read | Blue Tokai Coffee courts PE funds for its largest ever fundraise at $100 million The findings are likely to be welcomed by millions of regular coffee drinkers, although the American Heart Association has stressed that the research does not amount to a recommendation that people should begin drinking five cups of coffee a day.

The 400mg figure is an approximate upper limit for most healthy adults rather than a target. The amount of caffeine in a cup can vary considerably depending on the type of coffee, how it is prepared and the size of the serving. As a result, five cups of one coffee may not contain the same amount of caffeine as five cups of another. The AHA statement also makes an important distinction between ordinary caffeinated coffee and products containing concentrated or very high doses of caffeine. Evidence from normal coffee consumption should not be applied to energy drinks, caffeine shots or purified caffeine products, which have been associated with concerns including abnormal heart rhythms. Researchers also found that individual responses to caffeine can vary widely. Factors including genetics, age, habitual caffeine consumption and existing health conditions can affect how the body responds. Caffeine can temporarily increase alertness, heart rate and blood pressure, meaning that some people may experience stronger effects than others. The scientific statement found that moderate caffeinated coffee consumption was associated with a lower risk of coronary artery disease and stroke.

Low to moderate consumption was also associated with a lower risk of heart failure, although the AHA cautioned that higher levels of consumption may be linked to increased heart-failure risk. Also Read | How climate change is driving the search for new coffee beans The research also pointed to a possible association between caffeinated coffee and a reduced risk of type 2 diabetes. In people with certain heart rhythm conditions, the evidence was more complex. Randomised trial data suggested that coffee could reduce the risk of recurrent atrial fibrillation, while potentially increasing the frequency of premature ventricular contractions. Other factors may also influence the results. People who drink coffee regularly may differ from non-drinkers in their diet, exercise habits, work patterns or other aspects of their lifestyle. The AHA has therefore called for more randomised controlled trials to better understand the direct effects of caffeine on cardiovascular health. The findings also do not mean that every coffee-based drink is equally healthy. Coffee loaded with sugar, syrups and other high-calorie additions can have a very different nutritional profile from plain coffee.