Sleep deprivation causes poor decision-making.
Overtired brains search for pleasure when overworked.
Brain food: sleep. Most folks need 7 to 9 hours. Less than that and even the most dedicated dieter will crave Ben & Jerry's.
Dieters lost 55% less fat when they slept less for 14 days, even if their calories stayed the same. They were less full and had less energy after meals.
Like being drunk. You lack decision-making clarity.