Every year, around 100,000 metric tons of caffeine are consumed worldwide. This is the equal of 14 Eiffel Towers in weight. Caffeine is mostly found in coffee and tea, but it can also be found in sodas, chocolates, caffeine pills, and even decaf beverages.
Even if we haven’t gotten enough sleep, caffeine makes us feel alert, focused, cheerful, and active. But it can also make us feel worried and spike our blood pressure. It is the most extensively used drug in the planet.
So how does caffeine keep us awake?
|Caffeine – Science behind it; Credit: Mind the graph|