Many people may have had the feeling that they are not hungry when they stay up late, but they just want to eat, and it’s those high sugar, high calorie foods. So now that staying up late has become a big trend, many people have stepped into the obesity queue early. However, there are some people, although they also often stay up late, but not as habitual as others to add meals, but the body still has the tendency to become fat, and this is why? Cortisol, one of the killers that make us fat Cortisol is a glucocorticoid hormone secreted by the adrenal glands, which regulates the metabolism and utilization of proteins, carbohydrates and fats. When cortisol hormone is elevated, although it will accelerate the breakdown of fat and glycogen, but the effect on muscle breakdown to be more obvious, and will also inhibit protein synthesis, so we often feel weak after staying up late, if it is a long-term stay up late, there will be a more obvious loss of muscle, so that the basic metabolic rate becomes lower, forming a fat-prone body. In addition to these, the rise in cortisol hormone will also hinder the transmission of satiety signals, making us more hungry than usual, addicted to sugar and high-calorie foods, causing endocrine disorders and accelerating the accumulation of abdominal fat. In addition, prolonged elevation of cortisol can also lead to edema, making us bulky and weakening the fitness effect. Cortisol secretion will be affected by many factors, in addition to staying up late, long-term shock, stress, improper diet can cause cortisol levels to rise, so experts have been emphasizing that whether it is weight loss or prevention of obesity, we must first develop a good lifestyle habits, adhere to a healthy diet, and specifically for the treatment of morbid obesity weight loss metabolic surgery and special health management personnel to help and monitor patients Improve life and eating habits, but also to provide the necessary psychological counseling, otherwise, even if the weight can be temporarily reduced, there will still be the risk of re-fat.