Longevity has always been a topic of great concern. According to the current population age in China, the average age has increased, and more and more centenarians have appeared. This is another manifestation of the improvement of people's living standards. But it is not necessary for people to eat well or not. So, what is the secret of human aging? How can people live long and old? Don't worry, I'll tell you slowly.
In fact, aging is a phenomenon that no one can avoid, but it also has different degrees. Even people of the same age and sex in the same area have different degrees of aging. How to make yourself the slowest one, I believe, is a major event in the hearts of countless people. In recent years, various oral and external anti-aging products, such as bird's nest and pearls, advocate that human beings should maintain themselves from their twenties and keep themselves in the best condition among their peers forever. Is that really the case?
If you compare a man in his twenties with a man in his fifties, aging is very obvious. Relaxed skin, wrinkles, white hair, rickets and so on are all manifestations of aging. But between the ages of 20 and 34, there won't be much difference from the outside. As can be seen from here, 34 years old is the watershed when people's physical condition turns from the peak to the downhill.
At this time, the human body will enter a stable period; Until the age of 60, the degree of aging of the body will be higher; The next more aging stage is around 78 years old. If the birth of a person is defined as the beginning of aging, you will find that the interval between these three aging boundaries is getting shorter and shorter, and each interval will be reduced by about 8 years. The ancients said that people are rare until they are 70 years old, which means that with the aging of the human body, more than 70 years old is the life limit of most people.
So, what causes people's aging? Simply put, it can be divided into physiological and pathological categories.
As we all know, cells support human activities, but their activities are actually limited. Without human consciousness, cells have experienced countless cycles of aging, death, addition and re-aging. And the replacement of old and new cells will also decline, that is to say, fewer and fewer new cells are born, and more and more people are aging and dying; This will affect the aging of human organs and various tissues. Scientific research has proved that a cell can divide about 52 times in its life, and the process of cell division is the process of gene replication. The aging of cells always leads to the loss of data during gene replication; The more times a cell divides, the more information is lost in gene replication. Externalization to the human body is unconscious aging.
The end point of aging has been written in human genes. The length of mitochondria in DNA, in layman's terms, can be regarded as the length of your life. The length of mitochondria is innate to human beings, and the wear of mitochondria is controlled by the metabolism of cells. Because all activities of cells need mitochondria to provide energy, mitochondria are constantly being consumed. When the length of mitochondria is 0, the cell renewal of human body will lose its motivation. Guess what will happen at this time?
The Daily Mail reported that an innovative study by British scientists showed that 5% of people determined by genes would age and die earlier than others under the same conditions. There are also scientists at UCLA who hold the same view. They compare this phenomenon to the self-clock inside the human body, and a few clocks run faster than others. Even if these people don't smoke or drink, go to bed early and get up early, and pay attention to their health, they still can't slow down their biological clocks.
But this study also proves that if human beings adopt a healthy lifestyle, they can make the length of life and the running end of the self-clock as much as possible. And an unhealthy lifestyle will certainly accelerate the slow aging, in layman's terms, it is just a good card.
The basis of this study is based on the DNA analysis of blood samples of 6.5438+0.3 million people in the United States and Europe. With something called "epigenetic clock" as a tool, the aging speed of each person is calculated by observing the decomposition process of DNA molecules. This data can be used to predict the final life of the sample. The final result of this study was published in the journal Aging. Finally, this research report says that what human beings can do now may be to study how to effectively intervene in the human body according to this achievement, so as to prolong the life expectancy of people by at least 5-20 years.
Physiological aging is an irreversible trend no matter what measures are taken. Pathological aging is under this premise that external pressure is exerted to accelerate the process of human aging. This kind of external influence not only refers to physical injury, but also includes mental and psychological pressure suffered by people because of the external environment, which will also accelerate aging. Getting old overnight is a typical example of this spirit leading to aging.
According to historical records, Wu Zixu's father and eldest brother were both killed by King Chu Ping. When he was about to cross the city gate, he saw his wanted order and posted it clearly on the wall, so that he was not afraid of burning firewood. Wu Zixu was worried about how to get out of the city safely and escape the pursuit of the king of Chu, but at the same time he was helpless and worried that his head would fall to the ground overnight.
This story is from the History of the Eastern Zhou Dynasty, and it is a chapter-by-chapter novel about the history of the Eastern Zhou Dynasty, which is adapted from famous historical books such as Historical Records, Warring States Policy, Zuo Zhuan and Guoyu. The reason why I dare to name it Zhi is because the stories in it are basically true, but I have made my own interpretation of the details, and some historical events have added the author's own opinions. So, it's true to grow old overnight. However, this extreme situation is very rare. The most common thing in real life is that being too anxious and nervous can make people lose a lot of hair.
Pathological aging is generally irreversible, but this pathological effect can be terminated. For example, white hair cannot be dyed black, but after a period of nursed back to health, new black hair increases, and the aging process of this person will return to the running speed of the human body.
About the part of genes, ordinary people can't do anything. But the pathological part, that is, external factors, can be avoided as much as possible. In the same geographical area, regardless of the economic level, the overall health status of the population will have some similar characteristics. For example, men have a higher health index than women, but women can live longer than men. The differences are usually manifested in environment, virus, radiation, bad eating habits, bad living habits, lack of exercise, drug abuse, psychological stress and so on.
When individuals can't change the environment, we can only restrain ourselves as much as possible and avoid being changed by the environment to the greatest extent. Specifically, it is to make yourself as young as possible from the aspects of diet, work and rest, exercise and interest.
The Journal of American Nutrition Society once published an article, which clearly pointed out that people who often eat meat, butter, whole milk and sugar have more wrinkles and look older than those who often eat fish, olive oil and beans. Therefore, people are advised to eat more fresh fruits and vegetables and drink more boiled water or green tea. In addition, when cooking, spices such as ginger, garlic, cinnamon and clove can also help the human body to diminish inflammation and improve immunity. At the same time, sugar will accelerate skin aging, and smoke will accelerate skin and brain aging at the same time. Needless to say, what to do.
Now everyone knows the importance of sleep. The skills of the human body can only be repaired when people rest and sleep. If you compress your sleep time, it is equivalent to fatigue driving on the expressway, and occasionally sleeping less once or twice may have little effect. However, long-term lack of sleep will definitely lead to premature aging. This kind of aging is not only an external mental malaise, but more importantly, the internal organs have been overused and there is almost no time to repair them. In today's society, most of the reasons for the sudden death of young people who work overtime for a long time and with high intensity are physical blows, which is unsustainable.
Therefore, experts suggest that you must try to sleep for 7 hours every day; If you have insomnia, you can use millet porridge, bananas, apples, milk and so on. Help you sleep; Soaking feet can also help us fall asleep as soon as possible. In addition, the temperature, smell and quietness of the bedroom will also affect sleep. Experts believe that 15-20 degrees is the best sleep temperature, which will stimulate people to release aging hormones and enhance their resistance.
About sports. A study by King's College London shows that long-term exercise, such as cycling, jogging, brisk walking or swimming, will make these people's muscles more energetic than their peers, their body fat and cholesterol will increase slightly, and their hormone levels will remain at a high level for a long time. Therefore, for whatever reason, daily or regular exercise is the most effective means to keep young physically and mentally. If you really don't like sports, don't be too reluctant. People who spend their time on their hobbies and can spend every day actively and fully are often optimistic and energetic people, and such people will age slower than their peers.
Well, we have finished what each of us can do, and now it's time to witness the miracle.
According to human research on genes and the causes of aging, the Chinese Academy of Sciences has spent seven years screening and cultivating dozens of genes that have never been discovered with a probability of two thousandths. Then a gene named KAT7 was screened from these new findings, which affects the activity and viability of T cells in human body, and T cells are one of human immune cells, which can help human body resist infection and control tumors. However, when there is no inflammation and infection, T cells cannot play other roles. If KAT7 is turned off at this time, the frequency of T cell renewal can be slowed down, thus achieving the purpose of delaying aging.
Based on this conjecture, scientists did experiments on mice. Experiments show that 80% of the aged mice with KAT7 turned off in vivo are over 130 weeks, which is about 80 years old for humans. However, among the mice over 130 weeks old, only 27% did not turn off KAT7. The answer is self-evident. Turning off KAT7 early in life can really delay aging. It is estimated that people's life span can be extended by about 40 years.
However, this only delays aging as much as possible, but it can't stop aging. In other words, we should grow old and live long, not live forever. Scientists have known that human cardiomyocytes can operate for about 120 years, and brain cells can operate for about 150 years. Up to now, the ultimate life span of human beings is about 130 years.
In nature, there are creatures that never age, such as green hydra and lighthouse jellyfish. Apart from external factors, we can hardly see the green hydra that died naturally because of its weakness; Lighthouse jellyfish are more rebellious. They can reverse the life cycle and repair the body, so that the body does not age.
It is a big step for human beings to effectively delay aging. But there is still a long way to go to live forever or live forever. Perhaps, when human beings can decipher the secret of repairing their own injuries, it is the day when human beings can be born again indefinitely. Do you think it is possible for human beings to live forever?