“Because the neurons in low-power mode processed visual signals less precisely, the food-restricted mice performed worse on a challenging visual task.”
Starve a mouse until it loses 15 to 20 percent of its weight and its visual cortex cuts synaptic energy use by 29 percent. The price is blurrier vision. The brain trades accuracy for battery life, the same way your phone does. Anyone selling extreme diets as a focus hack should read this first.