If We Go To Sleep Hungry, Why Do We Wake Up Feeling Less Hungry?

When you wake up, you generally feel less hungry because the liver has maintained the blood glucose levels in your blood during your nap. Furthermore, there’s practically no physical activity during sleep, so your energy expenditure is also minimal. That’s another reason why you don’t feel as hungry.

Another possible reason can be attributed to two primary hormones, called leptin and ghrelin, which promote the appetite. As it turns out, the levels of both of these hormones are affected by the duration and quality of sleep, which makes one less hungry when they wake up.