According to medical science, the determination of sleeping hours varies according to the age of a person. However, the sleep duration of (18-65) year olds is 6 to 9 hours per day. However, the exact value is set at 6 hours. The 6 hours are divided into 3 parts , the first 3 hours. The growth hormone ( HGH) works in the human body. Which works to keep your body vibrant and radiant skin. If this hormone is not released, the damage to your skin will not be fixed again. This increases the chances of the whole body being damaged along with the appearance. 2 hours in the middle. Increases your melatonin. It is a hormone that keeps you fresh and encourages you to work on a daily basis. And it acts as an antioxidant that protects your skin from harmful elements. Last 3 hours. Rem (Rapid Eye Movement) or rapid eye movement sleep level. At this time it reduces cortisol (stress and anxiety hormone). And with it the body temperature decreases a lot and the muscles of the body become calm and relaxed. In this way the deepest recovery of your skin is done. On the other hand , if cortisol is increased , it can cause hair loss problems and with it, it will destroy the proteins in your skin which work to keep your skin smooth. Moreover , when you sleep, your body sweats a lot. And during this sleep, the body regains its balance through natural hydration and removes excess moisture. So if you leave sleep, your skin will have problems with moisture and it will become dry.