Energy drink, blood pressure and heart rate levels

In the study, conducted by Wayne State University researchers, blood pressure and heart rate levels increased in healthy adults who drank two cans a day of a popular energy drink.
While the increases didn’t reach dangerous levels in the healthy volunteers, the increases in blood pressure and heart rate could prove to be clinically significant in patients with heart disease or in those who consume energy drinks often.
Most energy drinks contain high levels of caffeine and taurine, an amino acid also found in protein-containing foods such as meats and fish. Both have had effects on heart function and blood pressure in some studies. In contrast, “sports drinks” in general contain various mixtures of water, sugars and salts alone, without chemicals aimed at increasing “energy” or alertness.