What are the causes of our body aging?

I believe everyone knows that people begin to learn everything ignorantly from the moment they are born into this world. As we continue to grow and develop until the age of 25, our bodies begin to show signs of aging. People have different physiques and live in different environments, and the degree of aging is also different. So what are the factors that cause our body to age? Let me introduce it to you today.

For young people full of vigor and vitality, no one would believe that they are aging. However, the reality is that aging begins in the teenage years. According to Dr. Lorin, a biologist at Harvard University in the United States, when a person is born, the number of brain cells reaches 14 billion. Since it is a cell that can no longer divide, its number basically does not increase after birth. On the contrary, after the age of 18, the number of brain cells gradually decreases with age. Starting from the age of 25, about 100,000 brain cells die every day. As age increases, the number of brain cell deaths increases each year, accompanied by a decrease in brain weight. But the rate at which brain cells die varies greatly from person to person.

Regarding the mechanism of aging, scientists say there is a hypothesis. But so far, no hypothesis can independently and completely explain the fundamental cause of aging. The ones with relatively sufficient evidence include the "molecular cross-linking" theory and the "error-causing disaster" theory, which are closely related to genetic genes, and the intercellular substance theory that aging is caused by excessive accumulation of intercellular collagen. Intercellular substances refer to substances produced by cells and secreted into cells or between cells. Such as hyaluronic acid, collagen, etc. Hyaluronic acid is a macromolecular substance that plays an important role in maintaining moisture in tissues. During adolescence, there is more hyaluronic acid, and the skin is moisturized and plump.

But with aging, hyaluronic acid decreases and is replaced by collagen. Collagen not only lacks elasticity, but is also not easily decomposed, so it is difficult for nutrients to enter cells and for cell waste to be eliminated, resulting in low cell metabolism, which ultimately leads to cell aging. Especially when collagen appears between capillaries, lymphatic vessels and cells, aging will appear quickly.

According to biologist Dr. Luo Xin, the water content in cells of people over 65 years old is only about 80% of that in young people. Arterial sclerosis is caused by the above phenomenon in the arterial wall. When blood vessels harden and blood flow is obstructed, it is bound to cause serious functional disorders of various organs. The elderly are often accompanied by arteriosclerosis. In addition, when the immune function is abnormal and aging occurs, an intercellular substance - amyloid protein AMYLOID will appear, which can also cause functional disorders. Patients will develop aging symptoms such as gray hair, hair loss, and skin aging when they are 10 to 20 years old, and often have complications such as adult diseases such as arteriosclerosis and diabetes. They die at around 45 years old.

The cause of premature aging is believed to be that the hyaluronic acid in the cells is excreted at an abnormally fast rate and therefore cannot function fully, leading to cell aging. The lifespan of mammals is fixed, generally equivalent to 5 to 10 times the time it takes the animal to reach maturity. If humans reach sexual maturity between the ages of 15 and 20, then human life expectancy should be between 75 and 200 years.

Through the above introduction, I believe everyone has a certain understanding of the causes of aging. Therefore, we must maintain our health during the aging process so that we can delay the aging of our bodies and brains and live healthier and longer.