EPTCastration had a huge effect on the lifespans of Korean men, according to an analysis of hundreds of years of eunuch "family" records.
They lived up to 19 years longer than uncastrated men from the same social class and even outlived members of the royal family.
They lived up to 19 years longer than uncastrated men from the same social class and even outlived members of the royal family.
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Dr Kyung-Jin Min, from Inha University, told the BBC: "We also thought that different living circumstances or lifestyles of eunuchs can be attributed to the lifespan difference.
"However, except for a few eunuchs, most lived outside the palace and spent time inside the palace only when they were on duty."
Instead he thinks the data "provides compelling evidence that male sex hormone reduces male lifespan".
"However, except for a few eunuchs, most lived outside the palace and spent time inside the palace only when they were on duty."
Instead he thinks the data "provides compelling evidence that male sex hormone reduces male lifespan".
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One thought is that male sex hormones such as testosterone, which are largely produced in the testes, could be damaging. The researchers said the hormones could weaken the immune system or damage the heart. Castration would prevent most of the hormone from being produced, protecting the body from any damaging effect and prolonging lifespan.
Dr Min said: "It is quite possible that testosterone reduction therapy extends male lifespan, however, we may need to consider the side effects of it, mainly reduction of sex drive in males.
Dr Min said: "It is quite possible that testosterone reduction therapy extends male lifespan, however, we may need to consider the side effects of it, mainly reduction of sex drive in males.
New research suggests that losing your balls as a little kid may let you live much longer as an adult.
Assuming this research was true (and that's a big assumption), if that was a trade you could make right now, what would you do?
