Since it is a sleep diet, it has something to do with the length and quality of sleep. Leptin, from the Greek alphabet, means "thin", which is translated as "leptin" in Chinese. It is a peptide hormone secreted by adipose tissue. When the body's energy storage is sufficient, leptin will act on nerve cells in the hypothalamus, control the body's eating behavior, and also play a key role in the process of fat synthesis and fat transformation. It is called "the fat switch of human body" by the medical profession. Auxin is a hormone secreted by the stomach, which can increase appetite and make you eat more. The working mechanism of LP and hunger hormone can be understood as a "check and balance" mechanism, which can control satiety or hunger. Hunger hormone comes from the stomach, which can increase your appetite, while LP comes from fat cells. When you are full, it sends a satiety signal to your brain.