Adequate sleep is very important for one’s physical and mental health. Excessive sleep or lack of sleep can damage the body. Generally speaking, it is best to sleep around 10 p.m. The time period from 10 p.m. to 2 a.m. is the prime time for sleep, which is the best time for skin repair and better skin absorption of skin care nutrients and metabolism. At the same time, 10pm to 5am is the time of detoxification of various organs, which can promote the synthesis of lymphocytes and enhance the body’s immunity.