On a day when it's hard to stay awake, it's common for people to have a cup of coffee or an energy drink. Usually sold in cans, energy drinks are high in caffeine and taurine, offering a hint to rev the consumer up and keep them awake and focused. "Contrary to popular belief, taurine does not act as a central nervous system stimulant, but rather as a mediator of intracellular calcium homeostasis. Through this, we can further control excitatory stimuli to the brain," explains the general practitioner Gabriel Resende. According to...