A priori, I suspect the castrated to be less healthy. The idea that the structures the body naturally strives to develop are unhealthy seems to be antithetical to Ray's worldview; another recapitulation of the Fall of Adam into biology, just like circumcision or recommendations against eating sugar or salt.
Furthermore, there's this, which suggests that men need testosteronee for more than fertility:
Furthermore, there's this, which suggests that men need testosteronee for more than fertility:
It is important to emphasize that progesterone is not just the hormone of pregnancy. To use it only "to protect the uterus" would be like telling a man he doesn't need testosterone if he doesn't plan to father children, except that progesterone is of far greater and more basic significance than testosterone. While men do naturally produce progesterone, and can sometimes benefit from using it, it is not a male hormone. Some people get that impression, because some physicians recommend combining estrogen with either testosterone or progesterone, to protect against some of estrogen's side effects, but progesterone is the body's natural complement to estrogen. - Ray Peat, 'Progesterone, Pregnenolone & DHEA'