Your brain might be small, making up just 2% of your body’s weight, but it’s a true energy hog! This tiny organ gobbles up a whopping 20% of the body’s energy, even when you're just sitting and daydreaming. But why does the brain demand so much power?

It’s all about keeping you sharp and functioning! The brain is like the body’s command center, constantly processing information, making decisions, keeping you breathing, and regulating countless bodily functions—24/7. To fuel all this action, it needs a steady supply of glucose (sugar) and oxygen, which get converted into the energy it needs to keep you ticking.

And here's a fun fact: even when you’re sleeping, your brain is still burning through energy, organizing memories and preparing for the next day. So, while it might be small in size, your brain is the ultimate multitasker, working tirelessly to keep you running!