Sleep deprivation can significantly impact release of hormones affecting appetite.1 Study participants whose sleep was limited to 4 hours/night for two nights had significantly higher levels of ghrelin, a hormone responsible for hunger and drive to eat, and reduced levels of leptin, a hormone which suppresses appetite, than participants allowed up to 10 hours of sleep.
Below, a couple fascinating research findings presented in his book: Walker writes from more than 20 years of experience studying sleep, first at Harvard Medical School and now as the director of the Center for Human Sleep Science at UC Berkeley.
