The University of Bonn in Germany says that energy drinks can have a disruptive effect on heart function. That’s not really surprising with almost three times the caffeine than coffee, but then add taurine into the mix. Before and after MRI scans showed significant increases in heart strain in the left ventricle of the heart after energy drink consumption. This region of the heart takes in oxygen from the lungs and sends it through the aorta to the rest of the body. Researchers say that don’t know how this strain impacts daily activities of athletic performance but they intend to find out.