Human brain facts often surprise people—especially the fact that our brain uses around 20% of the body’s total energy, even though it only makes up about 2% of our body weight.
This energy is mainly used to power the billions of neurons firing signals every second, keeping us thinking, dreaming, learning, and functioning. That’s why proper sleep, hydration, and nutrition are directly linked to better mental performance.
Fun fact: The brain can generate about 20 watts of electrical power—enough to power a small light bulb!
If you’ve ever felt mentally tired after studying or problem-solving for long hours—it’s real. Your brain literally burns fuel like a machine!
