Study Links Energy Drinks and Stimulants to Increased Cardiac Arrest Reports

Energy drinks and stimulant supplements have been linked to significantly higher rates of serious heart problems, including cardiac arrest and heart attacks, according to recent research released by the American Heart Association. The findings stem from an analysis of more than 28,000 adverse-event reports submitted to the Food and Drug Administration between 2017 and 2025. Researchers identified a troubling pattern involving products containing caffeine and other stimulants, particularly among younger demographics.

The study, which was scheduled for presentation at the American Heart Association's Scientific Sessions in Chicago, revealed that cardiac arrest was reported approximately 11 times more frequently in connection with caffeine and stimulant products than with items lacking those ingredients. Other cardiovascular concerns also showed elevated reporting rates. Heart attacks were documented about 4.5 times more often, while irregular heart rhythms and palpitations appeared roughly four times more frequently.

Furthermore, researchers noted that elevated heart rates were logged nearly three times as often, chest pain was reported 2.71 times as frequently, and fainting incidents appeared about twice as often. Perhaps most notably, around 45% of the cardiovascular event reports associated with these stimulant products involved individuals aged 18 to 34, an age group typically not linked with severe heart complications.

Sai Samayamanthula, a fourth-year medical student at the University of Virginia School of Medicine and a member of the research team, emphasized that these figures highlight differences in voluntary reporting rather than a direct probability that consuming an energy drink will induce a heart attack. Investigators were unable to definitively establish whether the products directly caused the reported medical conditions. However, Samayamanthula warned that regular consumers may unknowingly exceed recommended caffeine thresholds.

Experts have previously issued cautions regarding high-caffeine beverages. A scientific statement published by the American Heart Association indicated that up to 400 milligrams of caffeine daily is generally safe for most healthy adults, an amount roughly equivalent to three to five standard cups of coffee. In contrast, certain high-caffeine energy drinks and pre-workout supplements contain significantly higher concentrations per fluid ounce.

Dr. Gregory Marcus, a cardiologist at the University of California, San Francisco who chaired the earlier scientific statement, noted that high doses of caffeine can pose risks to the heart. Nonetheless, Marcus reiterated that the recent findings do not prove direct causation, as other variables such as underlying health conditions and individual consumption habits could influence the reported events. Researchers advise individuals monitoring their cardiovascular health to carefully examine caffeine product labels.