The brain makes up about 2% of body weight but uses 20% of its energy.
✓ TRUE FACT
The brain is about 2% of body mass but consumes roughly 20% of resting energy and oxygen. That’s a huge metabolic demand for such a small organ. It’s why blood flow to the brain is so tightly regulated.
🤯 "The brain makes up about 2% of body weight but uses 20% of its energy. The world’s smallest energy hog."