Extremely bad, it disrupts the law of human biological clock and causes many diseases, especially old age! ! ! You should know how your body's biological clock works According to the research of medical experts, the body's biological clock runs regularly. The metabolic activity of human body is at the lowest level at night 1 1 until 5 am, but the growth hormone secreted by pituitary gland increases greatly. At this time, the growth and repair of cells are the most vigorous, the peak of cell metabolism increases, and the cell division speed is 7-8 times faster than usual, so the skin's absorption of nutrition and skin care products is strengthened. At 20: 00-2 1: 00, the resistance of the body and skin to external stimuli decreases, facial nerve endings and expression muscles begin to fatigue, and edema is easy to appear around the eyes and lower limbs. 2 1: 00-23: 00 is the time for the immune system (lymph) to detoxify. During this time, you should be quiet or listen to music. 23: 00-0 1: 00 liver detoxification needs to be carried out in deep sleep, and staying up late is not conducive to detoxification. 0 1: 00-03: 00 gallbladder detoxification needs to be carried out in deep sleep, and staying up late is not conducive to detoxification. 03: 00-05: 00 Detoxification of lung. Cough patients cough the most during this period. Because the lungs are detoxifying, cough medicine should not be used at this time, so as not to inhibit the elimination of waste. 04: 00-06: 00 is the period of spinal hematopoiesis, so you must sleep soundly and don't stay up late. 05: 00-07: 00 large intestine detoxification. If you have abdominal pain, you should go to the toilet to defecate. From 07: 00 to 09: 00, when the small intestine absorbs a lot of nutrients, it is necessary to eat breakfast. It is best for patients to eat early, before 6: 30, and before 7: 30 for health-preserving people. People who don't eat breakfast should change their habits, even if it is postponed until 9 o'clock or 10, it is better than not eating at all. From 06: 00 to 08: 00, the amount of hormone secretion increased from early morning, while the amount of growth hormone secreted by pituitary gland decreased obviously, and protein synthesis of human body was inhibited. 08: 00- 12: 00 The metabolism of the body is the most vigorous, and the function and vitality of the skin gradually reach the peak, with strong stress ability and high work efficiency. In the afternoon 12:00- 15:00, the body gradually felt tired, the blood circulation concentrated in the digestive system, the skin blood flow decreased, and the absorption capacity of various nutritious skin care products was weak. 15: 00-20: 00 With the digestion of food, the improvement of microcirculation and the increase of oxygen content in tissues, the skin's ability to absorb nutrients gradually increases and reaches a peak. This period of time is most suitable for professional skin care in beauty salons, and can also be combined with aerobic and fitness. Experts caution: respect the law, be kind to yourself, put an end to diseases, and live a long and healthy life!