September 25, 2012
Castration 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.
[...] 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.