The life span of various animals is related to their own growth period, which is about 5 to 7 times the growth period. In humans, the growth period is 20 to 25 years, so the natural life span should be 100 to 170 years. The maximum lifespan of the average mammal is about 8 to 10 times its sexual maturity. According to this projection, human sexual maturity is 14 to 15 years old, then the natural life expectancy of human should be 110 to 150 years. There are also scientists from the number of embryonic cell division to analyze, that the number of human cell division is 50 times, the average cycle of each division is 2.4 years, so the life expectancy is 120 years. The human body constitutes the basic unit – cells The human body is composed of 60 trillion to 100 trillion cells, the death of 700 billion cells per day, while 700 billion cell regeneration, which is the body’s normal cell metabolism. What about abnormal cell metabolism? The death of cells to reach 700 billion at the same time, because of the environment, stress, disease and hormones lead to regeneration of cells did not reach 700 billion, the human body has a cell gene defect, which part of the defect, which part of the different diseases and symptoms, so the United States of America, Boston University molecular genetics, Dr. Wu Bolin concluded that thousands of diseases are inseparable from the cell gene disease. How to make cells normal metabolism? Stem cells are the cells of origin. Stem cells are cells with the potential to proliferate and differentiate, with the ability of self-renewing and replicating, capable of producing highly differentiated functional cells. Simply put, it is a class of primitive undifferentiated cells with multidirectional differentiation potential and self-replication ability, and it is the primitive cells that form the tissues and organs of mammals. Stem cells have a common morphology, usually round or oval, small cell size, relatively large nucleus, the nucleus is mostly euchromatin, and have high telomerase activity. Stem cells can be divided into embryonic stem cells and adult stem cells. The Yellow Emperor’s Classic of Internal Medicine states that a woman’s kidney qi averages out at thirty-seven years of age, or twenty-one years of age, plus a four-year health plateau, and begins to age at twenty-five years of age. A man with strong muscles and bones and average kidney qi at 38 years old, that is, 24 years old, plus a six-year health plateau, starts aging at 30 years old. Conclusion The stem cells in a woman’s body begin to decline from the age of twenty-five. Men begin to lose stem cells in their bodies at the age of thirty. How to replenish stem cells in the body? The first type: human autologous stem cells Human beings are born with service-immune defects, so when autologous stem cells are extracted and reused in the body, they are still with service-immune defects. For example, a 60-year-old person, the extraction of the body’s stem cells, extracted and then used in their own bodies, is still 60-year-old stem cells, will not be as active as 20-year-old stem cells. The second type: animal stem cells The genetic characteristics of the human body is particularly complex, is formed through 150 million years of evolution and environmental influences, while the genetic evolution of conventional animals only tens of millions of years, so the scientific research of countless times to match the genes of humans and animals with each other have ended in failure. Therefore, animal stem cells are neither scientific nor safe. The Third: Apple Stem Cells What are apple stem cells? Apple cells are a kind of under-differentiated and immature cells with potential functions of regenerating various tissues, organs and the human body, which are called “universal cells” in the medical field. Apple Stem Cell Fiber Apple cells are under-differentiated, immature cells with the potential to regenerate various tissues, organs and the human body, known as “universal cells” in the medical field. It can activate cell renewal.