The magic of sleeping and resting There is a fear of giving the body too much rest and sleep, feeling this is wrong for the body and will make it lazy. Nevertheless, ghrelin is closely related to hunger, while leptin connects to the feeling of fullness and satisfaction. Lack of sleep has found to increase ghrelin levels, leading to the necessity to eat. But, what are ghrelin and leptin? Leptin, a hormone made by our fat cells, minimizes our appetite. Ghrelin, on the other hand, is a hormone...