It might seem that feeling groggy is a sufficient reminder to try to get more sleep in the future. But research shows that a lack of sleep has other unpleasant side effects—namely, it can contribute to an increase in weight and belly fat.
There are 2 hormones in your brain that play an important role in regulating your appetite. The first, ghrelin, stimulates your appetite and causes you to feel hungry; the second, leptin, suppresses your desire to eat. In a properly functioning brain, these chemicals are in balance to keep your appetite at an appropriate level. But research has shown that when you don’t get enough sleep, ghrelin levels go up and leptin levels go down, causing you to want to eat more.
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