Your brain's power plant

Switch the fuel supply and watch what reaches the brain.

Glucose enters a neuron, mitochondria convert it into ATP, ATP powers the brain Neuron Glucose from your meals Mitochondrion turns fuel into ATP Brain ≈120 g glucose a day ATP output full
2 %of your body weight
≈20 %of your resting energy use
≈120 gglucose the brain uses daily

Schematic illustration. Figures: Raichle & Gusnard, PNAS 2002; Institute of Medicine, Dietary Reference Intakes 2005.