Secret: I didn’t get enough sleep before I was 30, but I can’t sleep after I turned 30

　　It turns out that there is a pineal gland in the human body, which can secrete a substance called melatonin, which has a hypnotic effect. When a person is just born, the body's melatonin secretion function is low; when a person is 2 and a half years old, the secretion level of melatonin will reach a peak; in adolescence, the level of melatonin secretion in the human body begins to gradually decrease; in middle age, that is, after the age of 30, the amount of melatonin secretion is only 1/2 of the peak period. , and then it has been on a downward trend, but the rate of decline will vary from person to person; after the age of 80, the amount of melatonin secreted by many people drops to less than 10% of the peak, and only a few people can maintain it above 10%. Therefore, as age increases, people need less and less sleep, and many people may even suffer from insomnia.

　　It is not difficult to see that the inability to sleep after the age of 30 is precisely due to age factors that cause the body's level of melatonin secretion to decrease. In fact, in addition to age factors, many human factors also affect the secretion of melatonin in the human body. For example, people who often work under strong light or stay up late under the light for a long time will reduce the secretion of melatonin.

　　This is because when the pineal gland in the brain is exposed to strong light, its secretion function will be disrupted, delaying the secretion of melatonin and delaying the human biological clock by 2 to 3 hours. At this time, because the function of the pineal gland is weak, it is unable to remove free radicals that are harmful to the human body in the body, which in turn leads to more disordered pineal gland function. If things go on like this, the pineal gland will be unable to protect itself, and will gradually weaken from function to atrophy and calcification of cells, accelerating human aging.

　　It can be seen from the above that the biological clock not only regulates your "awakeness" and "sleep" during the day, but also affects your growth, development and aging process throughout your life. Before middle age, the biological clock is called the "growth clock"; after middle age, the biological clock is called the "aging clock." Therefore, if a person does not take good care of his body before the age of 30, he will be overdrafted. healthy , seriously disrupting the biological clock, which will lead to a decline in sleep quality after the age of 30, and even lead to premature aging.

　　The biological clock not only regulates your "wakeiness" and "sleep" throughout the day, but also affects your growth, development and aging processes throughout your life.