The most precious golden age for people aged 30 to 50 is that they are more regular and mature in terms of human structure, function and mind, and tend to be stable at home and work, so people's physical state is also in a relatively peaceful and stable stage, and various tissues and organs of the human body begin to age.

Recently, British researchers confirmed the age at which all parts of the human body began to lose points in simultaneous light competitions. The following is the aging and degeneration schedule of some organs in the human body.

It is not difficult to see from the above table that under normal circumstances, the functions of the main organs of the human body begin to decline after the age of 30. However, due to the development of modern economy, people's pressure is increasing, and environmental pollution is becoming more and more serious, which has seriously affected people's normal physiological functions and health preservation has begun. Health preservation is not immortality, let alone immortality. It refers to maintaining, conditioning and supporting life. That is to say, based on the principle of regulating yin and yang, harmonizing qi and blood, and preserving spirit, we can achieve the goal of health and longevity through various methods such as regulating mind, guiding breath, regulating four seasons, supplementing food, supplementing medicine, abstinence, avoiding food and so on.