American Heart Association Reveals The Optimal Daily Cups of Coffee For Your Health - ScienceAlert

What the report says

ScienceAlert reported on July 20, 2026, that a new scientific statement from the American Heart Association reviews recent evidence on caffeine and heart-related health, finding that moderate intake appears safe for most adults. The AHA volunteer writing group assessed existing studies on caffeine’s links with blood pressure, cholesterol, diabetes and cardiovascular conditions such as coronary artery disease, stroke, heart failure and arrhythmias.

According to the article, the statement’s practical threshold is up to 400 milligrams of caffeine a day, roughly three to five cups of caffeinated coffee, provided it is not loaded with sugar, cream, syrups or similar additives. Gregory Marcus, a University of California, San Francisco cardiologist who chaired the writing group, said this level did not appear to raise cardiovascular risk for most adults. The source of caffeine also mattered: coffee and tea may contain beneficial compounds, while energy drinks can include high caffeine doses, sugar and other ingredients.

The evidence summarized by ScienceAlert was not uniformly simple. Caffeine could raise blood pressure in people with hypertension, while some studies linked coffee intake with lower risks of type 2 diabetes, coronary artery disease and stroke. The article cited findings including lower diabetes risk among habitual coffee drinkers and meta-analyses suggesting reduced coronary disease and stroke risks at moderate consumption levels.

The AHA statement, published in Circulation, also emphasized remaining uncertainties. Researchers said more work is needed to separate caffeine’s effects from other compounds in coffee, evaluate non-coffee caffeine sources and understand differences for people with hypertension or other medical conditions.