Up to five daily coffees deemed safe for heart health
New guidance from the American Heart Association confirms that consuming up to five cups of black coffee daily poses no cardiovascular risk, offering clear parameters for Europe's deeply rooted coffee culture.
Consuming up to 400 mg of caffeine per day—roughly five cups of coffee—does not increase cardiovascular risk and may even offer protective benefits, according to a major new review by the American Heart Association. The analysis found this level of intake is generally safe for most adults. Researchers also linked moderate consumption to a lower risk of heart failure, heart disease, stroke, hypertension and type 2 diabetes in some individuals.
The lowest mortality risk was observed at a slightly more moderate intake of between two and four cups 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,” said Gregory M. Marcus, a co-author of the paper and a professor of medicine at the University of California, San Francisco.
Coffee is the most popular way to consume caffeine globally, serving as the primary source for most adults. However, the researchers cautioned that this safety profile does not automatically extend to other sources. Far less is known about caffeine derived from tea, chocolate, fizzy drinks, and over-the-counter or prescription medications. The authors specifically warned that high-dose sources, particularly energy drinks, could cause cardiovascular harm and require further study.
How individuals process caffeine depends heavily on genetics, metabolism, age and past intake. Caffeine from coffee is metabolised by the liver and typically reaches peak concentration in the bloodstream within an hour. While some regular drinkers build a tolerance to higher levels, others may experience strong effects from the exact same quantity.
“Although research suggests that caffeine consumption may be associated with certain cardiovascular benefits for some people, it’s important to remember that there is no ‘one-size-fits-all’ strategy for safe caffeine consumption,” Marcus said. “What may be a reasonable amount for one person could cause unwanted effects, such as heart palpitations, anxiety or sleep disruption, in another.”
The method of preparation is ultimately critical to realizing any health benefits. The researchers noted that not all coffee drinks are created equal. Large amounts of added sugar, flavoured syrups and heavy dairy products can substantially increase daily calorie intake. These additions can entirely counteract the potential health advantages associated with drinking plain coffee.
