Coffee can perk us up, make us happy and help us focus. But how does it work?
As the latest episode of AsapSCIENCE explains, caffeine works in a similar way to cocaine, by stimulating the production of dopamine, a hormone that makes us feel good.
It also blocks the receptors of adenosine, a chemical that builds up the longer you're awake and makes your brain sleepy. By blocking these receptors, caffeine makes you feel less tired, but unfortunately, your brain responds by creating more receptors, so over time you need to drink more coffee to get the same results. And when you stop, you're likely to experience withdrawals.
And, yes, you can drink too much. Caffeine overdose can cause mania and anxiety, and can even lead to death. So how much coffee would it take to kill you? Watch the episode below to find out.