In the past dynasties in our country, many emperors dreamed of "immortality", and even many emperors took some measures to pursue their "dream".
One of the more well-known ones is Qin Shi Huang .
In 210 BC, Qin Shi Huang saw the mirage on the Haizhou Bay during his east tour, and thought that the scene was created by immortals, so he sent Xu Fu to look for immortals to seek medicine.
Xu Fuxiao claimed that there were big fish in the sea, and he went to the shore in vain to ask for medicine.
So Qin Shihuang sent 500 samurai archers to accompany Xu Fu, along with hundreds of skilled craftsmen and hundreds of childhood virgins, to go to the sea to Xianshan to seek the "elixir of longevity".
Xu Fu Dongdu Failed to find the elixir of life, but when he came back, he was afraid that Qin Shihuang would blame him and would not save his life, so he stayed in "Plain Guangze" (now Kyushu, Japan), so far Qin Shihuang The "Dream of Longevity" failed.
Even if Qin Shi Huang failed, there are still many emperors in later generations who still enjoy it, and of course none of them can succeed.
But the most ironic thing is that although there are few emperors with long lifespans, most of the eunuchs around the emperor have high lifespans.
Current Biology analyzed records of a long line of eunuchs during the Joseon Dynasty from 1392 to 1910. Researchers extracted detailed birth and death data on 81 court eunuchs with an average lifespan of 70.
But during the same period, the life expectancy of non-eunuchs of the same socioeconomic class ranged from 50.9 to 55.6 years.
The difference between the two is 15 to 20 years.
So is this data a coincidence or scientific basis?
is actually in Europe,Scientists have long paid attention to a phenomenon: after the ram has been castrated, the life span is much longer than that of normal rams.
To know the upper limit of the life span of mammals is constrained by many factors. If you ignore some objective factors that can be adjusted, such as diet, environment, etc., the most ideal state, the upper limit of mammalian lifespan is only affected by DNA aging .
Animals cannot live long if their DNA is old.
So to prolong the lifespan of mammals, the method is actually very simple: slow down the aging speed of DNA .
After in-depth study of DNA, scientists found that in all mammals DNA both ends have " telomere " ,In the process of biological survival, DNA will keep copying , DNA Each time is copied, the "telomere" will be shortened accordingly.
And when the DNA is copied to 50th or so , the "telomere" is already short to the limit , short The DNA after that will cause it to be unable to maintain the normal structure of DNA.
At this point The structure of the DNA will collapse and the animal will die .
Based on the phenomenon that castrated rams generally live longer than non-castrated rams, New Zealand University of Otago and University of California The research team has carefully studied this phenomenon.
They compared the rate of DNA senescence in castrated rams with that in normal male rams.
And they were surprised to find: The needle of the " epigenetic clock" in castrated rams is significantly slower than that of uncastrated rams. How much slower is
? About 60% slower!
This means that castrated rams live 60% longer than uncastrated rams!
Then they expanded their research, and the results were surprisingly similar, not only in rams, but also in other mammals, such as bats, rats , etc.
So the question is, humans are also mammals, so Will male castration also prolong lifespan?
The article cited earlier that eunuchs in the Joseon Dynasty generally lived longer than non-eunuchs of the same social class.
Because there are many kinds of documents in ancient my country, some scientists have studied the situation of ancient China , and the results are similar to the eunuchs of the Joseon Dynasty.And the data obtained is more systematic and complete.
They found that The average life expectancy of ancient Chinese emperors was only 40 years old , while the average life expectancy of eunuchs was 30 years older than many emperors, reaching An astonishing 71 years Aged .
And in comparison, the emperors' various objective living conditions, such as clothing, diet, labor intensity and psychological satisfaction, are much higher than those of the eunuchs. Logically speaking, emperors who are "pampered" should have a longer life than eunuchs who are often "bullied".
But the actual result is just the opposite.
Combined with various scientific experiments and a large number of statistical data, it can basically show that the life expectancy of human males after castration is also longer than that of non-castrated males, but this definitely needs further detailed research, after all, this conclusion cannot be clinically The experiment, I believe there is no way to find volunteers to accept this experiment.
But then again, even if it were true, I believe no male would want to castrate just for longevity? But there are no absolutes. In martial arts novels, Yue Buqun and Eastern Invincible , don't they "swipe the sword from the palace" just to practice peerless martial arts?
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