Here’s the dirty little secret about “energy drinks”...
They are mostly just weird flavorings, Sugar, and carbonated water... with Caffeine and B vitamins.
The B Vitamins and Caffein simply stimulate your system, so you absorb the sugar even faster...
But its the sugar thats the real problem... though any stimulant can cause issues too in large enough doses.
Actually, the caffeine levels of “energy drinks” is no more than cola. The mega-doses of B vitimins is probably the most important. A controversially effective ingredient in energy drinks is taurine. Taurine has been shown to lower cholesterol and increase metabolism. But whereas caffeine can cause anxiety, taurine has been shown in animals to lower the metabolic pathways associated in humans with anxiety.