SLEEP & WEIGHT LOSS
Sleep is like nutrition for the brain. Most people need between 7 and 9 hours each night. Not sleeping enough—less than seven hours of sleep per night—can reduce and undo the benefits of dieting. HORMONES LEPTIN & GHRELIN Hunger is controlled by two hormones: leptin and ghrelin. People who are sleep-deprived report having an increased appetite. The more ghrelin you produce, the more you stimulate hunger while also reducing the amount of calories you burn (your metabolism) and increasing the amount fat you store. Leptin is a hormone released from fat cells. It suppresses hunger and signals fullness in the brain. When you do not get adequate sleep, the body makes more ghrelin and less leptin, leaving you hungry and increasing your appetite. You need to control leptin and ghrelin to successfully lose weight.