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Reduced risks of various diseases, better liver health, and perhaps even a longer life: The potential health benefits of coffee have been highlighted by a growing body of research in recent years.

According to the American Heart Association (AHA), up to five cups of coffee a day is safe for most people, citing new research recommending a cap of 400mg of caffeine.

Moderate coffee intake appears to be not only “generally safe for most adults”, but also “linked to a lower risk of several cardiovascular conditions, including heart failure, heart disease and stroke in some individuals”, the AHA said in July (2026).

Coffee contains bioactive compounds that may have antioxidant and anti-inflammatory properties, which are the likely source of its wider health benefits, according to the AHA.

The same does not hold for so-called energy drinks, however, the researchers warned.

“High doses of caffeine, such as those found in energy drinks, including energy shots, may have harmful effects on the heart and should be avoided,” said University of California, San Francisco professor of medicine Dr Gregory Marcus.

ALSO READ: Did you know there’s caffeine in other items that are not coffee or tea?

The researchers cautioned that it can be tricky to show cause and effect when it comes to measuring the effects of coffee.

“Most studies on caffeine are observational,” they pointed out, explaining that it can be “difficult to separate the effects of caffeine from other ingredients usually added to coffee, such as milk, cream, flavoured syrups and/or sugar”.

In 2021, scientists at the University of Edinburgh and the University of Southampton, both in Britain, reported finding indications that moderate coffee consumption can protect against liver disease, warning that four cups containing high-dose caffeine should be the limit.

In 2024, a China-based team found that around three cups a day could boost cardiovascular health. – dpa

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