Energy drinks may increase blood pressure
Sure, an energy drink may seem like just what you need to get through a long day. But new research from the University of the Pacific indicates that consuming the drinks can raise your risk of increasing your blood pressure and disturbing your heart's natural rhythm.
The researchers found that people who consumed three cans of energy drinks had a longer QT interval, which is the segment of the heart's rhythm on an electrocardiogram—it’s the time between spikes on an electrocardiogram chart. Longer than usual QT intervals have been linked to serious irregular heartbeats and sudden cardiac death. The scientists, who examined the QT interval of 93 people, found that the it was 10 milliseconds longer for those who drank energy drinks.
The study also found energy drinks can increase systolic blood pressure – the top number in a blood pressure reading – by an average of 3.5 points. Since energy drinks also contain caffeine, people who do not normally drink much caffeine could be more likely to see an increase in their blood pressure.