Fig. 2From: In-vitro examination of the positive inotropic effect of caffeine and taurine, the two most frequent active ingredients of energy drinksThis figure shows the composition of each trail. The samples were exposed to electrical stimulation for at least 40 min before recording was started and continued for 10 min (control period). Then the test substance was applied, and after 5 min, measuring was recommenced and continued for 5 min (measuring period)Back to article page