![]() ![]() It does that by binding to adenosine receptors but not setting them off. What caffeine does is stop the binding of adenosine with adenosine receptors. When you're asleep, your body's muscles relax, and your brain has some time to stop concentrating and process what's happened during the day. The natural way to block it is by getting some sleep. However, it's a byproduct that your brain releases when you concentrate for extended periods and hinders arousal, making it hard to think, move fast, and eventually make the right decisions. What's making you sleepy is a compound your brain produces called adenosine.Īdenosine is vital in many biochemical processes and is an important neurotransmitter. A few hours later, you'll start feeling you need some sleep. As a result, you'll feel like you're not that creative and can't concentrate that easily anymore. While there are no pain receptors in the brain, your mind also becomes sluggish. Your body tells you you're getting tired by aches, pains, and even weakness. One of the ways to do that is through food, which only helps your body recover, though. Just like anything, when you spend energy, you need to recharge. ![]() That means that your ancestors' bodies were put under much physical and mental pressure. Every animal's (including yours) body evolved to move around during the day, catching prey or finding any other type of food. To know how caffeine keeps you awake, we should first look into why we get sleepy in the first place. Was that cup of coffee that you had in the morning not enough? Coffee keeps you awake for a few hours, but many more factors can change that.
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