Popular energy drinks and stimulant-containing supplements are facing renewed scrutiny after American researchers uncovered concerning patterns linking their use to reports of serious heart complications, particularly among younger adults. In preliminary research released by the American Heart Association, scientists analysed 28,345 adverse-event reports submitted to the US Food and Drug Administration between 2017 and 2025, including 854 reports involving products containing caffeine or other stimulants. They discovered that reports involving these products were approximately 11 times more likely to mention cardiac arrest and 4.5 times more likely to mention heart attacks than reports involving products without stimulants. Abnormal heart rhythms, chest pain, elevated heart rate and fainting also appeared more frequently, while approximately 45% of the stimulant-related cardiovascular reports involved adults aged 18 to 34. Researchers suggest that excessive caffeine consumption, combining stimulant products with alcohol or intense exercise, and previously undiagnosed heart conditions may help explain some of these observations. However, the study relied on voluntary safety reports and cannot establish whether the products directly caused the events or calculate the actual risk faced by consumers. The findings nevertheless highlight the importance of understanding caffeine content, avoiding excessive stimulant intake and seeking medical advice when symptoms such as palpitations, chest pain or unexplained fainting occur.
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