FIT HAPPENS

The brain uses about 20% of the body's total oxygen and energy. Which explains the naps after thinking too hard.

✓ TRUE FACT
Despite being only about 2% of body weight, the brain consumes roughly 20% of resting oxygen and energy. That’s why oxygen drops can affect thinking quickly.

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The brain uses about 20% of the body's total oxygen and energy. Which explains the naps after thinking too hard. | SmartAss Facts