American Heart Association deems up to 5 cups of coffee safe for most ad…

The American Heart Association (AHA) has released a new scientific statement indicating that for most adults, consuming up to 400 mg of caffeine per day — the equivalent of up to five 8-ounce cups of caffeinated coffee — is safe and is not associated with an increased risk of cardiovascular disease. This guidance, published on July 20, 2026, in the association’s peer-reviewed journal Circulation, addresses long-standing questions regarding caffeine’s impact on the heart.

“Caffeine consumed in coffee is a key part of daily life for millions of people, and in our review of the most recent research, for most adults, intake of up to 400 mg of caffeine/day, the equivalent of up to 5 cups of caffeinated coffee per day without added sugars or fillers, is safe and does not increase cardiovascular risk,” said Dr. Gregory M. Marcus, chair of the scientific statement volunteer writing group and a professor of medicine at the University of California, San Francisco School of Medicine. The research links habitual consumption of such coffee to a lower risk of several conditions, including Type 2 diabetes, coronary heart disease, stroke, and heart failure.

The writing group noted that how coffee is prepared and consumed significantly impacts its health profile. For example, unfiltered coffee, including French press, espresso, Turkish, or boiled coffee, contains a natural compound called cafestol, which is associated with increased levels of low-density lipoprotein (LDL) or “bad” cholesterol. Conversely, paper-filtered and instant coffees do not contain significant levels of cafestol. Furthermore, the authors caution that adding sugars, flavored syrups, and cream can increase caloric intake, which may counteract the health benefits associated with the bioactive antioxidant and anti-inflammatory compounds found in coffee.

The AHA’s statement makes a sharp distinction between coffee and high-concentration caffeine products, such as energy drinks and energy shots. Researchers warned that these products, which can contain three to four times the caffeine of regular coffee per fluid ounce, may cause cardiovascular harm. According to the report, these high doses of caffeine are associated with increased blood pressure, heart palpitations, and potentially life-threatening irregular heart rhythms or arrhythmias. While some studies suggest tea consumption may be associated with reduced risks of atrial fibrillation, heart failure, and stroke, the AHA emphasized that more research is needed on non-coffee caffeine sources.

The experts stressed that there is no “one-size-fits-all” strategy for caffeine consumption, as individual responses depend on genetics, metabolism, age, medications, and underlying health conditions. While some individuals can easily metabolize 400 mg of caffeine, others may experience sleep disruption or anxiety at much lower levels. Because of this variability, the AHA states that individuals with existing cardiovascular concerns or other medical conditions should consult their healthcare providers to determine what is appropriate for them.

Due to the lack of sufficient, rigorous data to develop definitive clinical recommendations, caffeine was not included in the Association’s 2026 Dietary Guidance to Improve Cardiovascular Health. The writing group called for more randomized controlled trials to better understand how caffeine affects different populations and to isolate the effects of caffeine from other compounds found in coffee.