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: 83a216ce-c01b-4092-8ff5-e3b8b122122a
Created: 2026-03-20T13:03:09.372Z