An interesting study that somewhat counters this one is the study that found that eunuchs live much longer than the general population. https://healthland.time

An interesting study that somewhat counters this one is the study that found that eunuchs live much longer than the general population. https://healthland.time.com/2012/09/25/do-eunuchs-really-live-longer/ https://healthland.time.com/2012/09/25/do-eunuchs-really-liv... ...but this was a historical look at 81 Korean imperial eunuchs from the 14th to early 20th centuries, and compared them to other male imperial court members. Anyone want to signup for a modern test? ...but before you dismiss this completely - modern animal mammalian studies have confirmed this result and it also helps explain why women live longer. ...though the studies only looked at castration prior to puberty. That's important because overall height (a proxy for mass and cell count) is inversely correlated with longevity.