In metabolic terms, the brain is greedy. It makes up only a small fraction of the body’s mass, yet in a typical resting adult it consumes around a fifth of the available energy. Careful measurements of blood flow and glucose use show that intense mental work increases that baseline by only a few percent.
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ID: 137d14ef-a26c-4399-a0bb-6d92d892b869
Created: 2026-03-20T13:04:11.517Z