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The brain consumes about 60% of the glucose in your bloodstream. Thinking hard really is a snack-worthy activity.

✓ TRUE FACT
The brain is a major glucose user, but “60% of your bloodstream glucose” is an overstatement for typical whole-body metabolism. At rest, the brain uses about ~20% of the body’s energy, and it relies heavily on glucose—especially compared to many other tissues. During prolonged fasting, it can use ketones more.

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The brain consumes about 60% of the glucose in your bloodstream. Thinking hard really is a snack-worthy activity. | SmartAss Facts