When you drink coffee, it mimics a neurochemical called Adenosine. This is a chemical that makes us feel sleepy and turns us down when we are tired. When caffeine enters your body, it works with the receptors that detect adenosine and blocks them from performing their regular function. In other words, when you take coffee, the caffeine interferes with adenosine – the sleep causing chemical – receptors and prevents you from getting sleep. This is how you stay alert when you take coffee. Okay, what’s next? When the adenosine receptors are blocked, your body has no other choice but to release its own stimulants – dopamine and glutamate – the two chemicals responsible for a feel-good experience for human beings. It means, your cup of coffee makes you feel happy because coffee stimulates neurotransmitters in our brain. Learn more