For years, scientists have debated whether coffee helps or harms the heart.
A new scientific statement from the American Heart Association offers reassuring news for most coffee drinkers: moderate amounts of caffeinated coffee appear to be safe and may even lower the risk of several cardiovascular diseases.
The report was published in Circulation after experts reviewed many recent studies. Instead of testing one new treatment, the authors examined existing evidence to identify consistent patterns across different populations.
The review found that consuming up to 400 milligrams of caffeine a day is generally considered safe for healthy adults. This is roughly equal to no more than five small cups of black coffee each day.
Coffee may lower the risk of heart disease, stroke, heart failure, and type 2 diabetes, although scientists are still unsure whether caffeine or other natural compounds in coffee provide these benefits. Because most studies were observational, they cannot prove that coffee directly causes better health.
The report also highlighted several cautions. High doses of caffeine, particularly from energy drinks and concentrated energy shots, were associated with higher blood pressure and dangerous heart rhythm problems, even in some younger adults.
Researchers found that not all caffeine sources should be treated the same. Tea, coffee, soda, supplements, and energy drinks contain different ingredients that may affect how quickly caffeine enters the body and how it influences the heart.
Another important message is that coffee should not automatically be loaded with sugar and sweetened creamers. These additions increase calories and may reduce the overall health benefits associated with plain coffee.
Scientists say future clinical trials are needed to better understand why people react differently to caffeine and which coffee components are responsible for its possible protective effects. Until then, moderate coffee intake appears reasonable for most adults, whereas excessive caffeine from energy products should be avoided.
This scientific statement summarizes the best available evidence rather than proving cause and effect. Overall, the findings suggest that moderate black coffee is safe for most adults and may even support heart health, while highly caffeinated energy drinks appear to carry greater risks.
Individual responses to caffeine vary, so people should consider their health conditions and discuss caffeine intake with their healthcare provider when needed.
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Source: American Heart Association.
