One third of a person’s life is spent in sleep. Sleep is the regulation of the body and the guarantee of life, without which there would be no continuity of life. As a product of the earth, with the intertwining of day and night at sunrise and sunset, human’s must also be in tune with natural life – including sleep, awakening, somatic activities and various physiological and psychological changes. However, in modern society, because of the development of technology, and fast-paced and high-stress life, human sleep habits are defying the laws of nature and becoming shorter and shorter. It is indisputable that the reduction of sleep time will cause certain harm to our health. But studies have shown that lack of sleep can also make people’s face drop and make them ugly, which also needs to cause people – especially the face control people – to be highly alert. Body type: lack of sleep can cause obesity For years, researchers have been clear about this fact: adults who get less than six hours of sleep a night have a higher risk of being overweight. In children, less than ten hours of sleep per night is also associated with weight gain. The American Sleep Association has tracked the average sleep from nine hours to seven hours over the past half century, and the BMI has risen from 22 to 32. Although people have become more nutritious over the past half century, it cannot be ruled out that increasing body fat is associated with less and less sleep. University of Chicago researchers studied more than 30 healthy young men and women, some of them sleep less than 5 hours a night, as a sleep-deprived group; the rest of the people sleep 7 to 8 hours, as a normal sleep group, after observation came to the latest conclusion: sleep-deprived group in the body insulin can not be normal glucose metabolism, and therefore may develop into obesity, while the normal sleep group insulin sensitivity is normal . It is not known whether the insulin sensitivity of the sleep-deprived individuals can be improved after improving their sleep. Therefore, those who sleep more than 8 hours a day and less than 5 hours a day will make their weight gain, the right amount of sleep to help the body shape of health. Skin: “Beauty sleep” has scientific justification Some careful friends will find that when they sleep well the quality of the skin will be much better, the skin tone will have a glossy not dull, look much fairer than usual. The reason why the skin is soft and shiny is that it relies on the capillaries in the subcutaneous tissue to provide adequate nutrition. Lack of sleep can cause skin capillary stagnation, circulation is blocked, so that the skin cells do not get enough nutrients, thus affecting the skin’s metabolism, accelerating skin aging, so that the skin color looks dull – one of the most common reactions, when the lack of sleep to produce dark circles under the eyes. Proper skin rest promotes the division of skin cells. The most vigorous time of the day for skin metabolism is at night, especially between about 22:00 p.m. and 2:00 a.m. If you get a better sleep at this time, you will be able to speed up skin metabolism, and skin repair and recovery will be better, making the skin slow down aging. Late at night between 23:00 and 2:00 a.m. is also the time of liver detoxification and intestinal detoxification, detoxification is smooth, the body’s internal immune function is repaired, and the impact on mental appearance is also great. American Sleep Association researchers followed a forty-year-old female experimenter, when she was deprived of sleep for only six hours of rest a day, for a week on the face of a large change. Glow: Adequate sleep gives energy and glow The mysterious deep sleep is the stage of sleep that most helps restore energy and strength. The deep sleep stage is subjectively a period of almost complete detachment from the external environment. In the case of children entering this stage, waking them up is an almost impossible task. Many important physiological activities occur during the deep sleep stage, during which the body pulses the release of human growth hormone, which facilitates the necessary repair of muscle cells after a training load – a key reason to ensure that people are energetic and radiant the next day. If deep sleep is interrupted, growth hormone stops immediately – resulting in depression and low energy the next day. No matter how much we know about the deep sleep state, it is helping us regain strength and energy. Unfortunately, deep sleep is always susceptible to stress, sleep deprivation and interruptions, and medications. We cannot escape the ubiquitous stress and need to try to achieve regular bedtime and increase our deep sleep time to ensure proper production of growth hormones and ensure that we have plenty of energy. So, if there is a chronic lack of sleep, it can lead to people getting fat, haggard, dry skin and depressed, while with normal sleep, it is the opposite – people are ugly not only to read more, but also to sleep well first.