It should be noted, however, that these findings come from studying records from centuries ago comparing the life spans of 81 men who were castrated either by accident or on purpose with men who were not castrated.
The Guardian (of course) reports:
The evidence comes after careful study of genealogy records of noble members of the Imperial court of the Korean Chosun dynasty (AD 1392-1910).
Kyung-Jin Min, of Inha University, said: ‘This discovery adds an important clue for understanding why there is a difference in the expected life span between men and women.’
…By poring over those records, Min and his colleague Cheol-Koo Lee, of Korea University, found that eunuchs lived 14 to 19 years longer than other men did.
Image of close-up of a gold door courtesy of Shutterstock