India, June 8 -- Energy drinks are non-alcoholic, caffeinated beverages that have been marketed for decades as something that boosts both mental and physical performance of individuals. It is often what students chug during their late-night cramming sessions, and what people take a swig of in the middle of a hectic day.

However, for some people, the effect of the energy drink does not match expectations. In some cases, people are known to fall asleep right after consuming the beverage, which likely baffles them and others who hear about it. Taking to Instagram on June 8, Dr Kunal Sood, a Maryland-based physician in Anesthesiology and Interventional Pain Medicine, explained why this happens.

Dr Sood explained that the high concentration ...