Sperm quality in vegans and vegetarians may be poor, with issues in motility and hypermotility.

“they looked at the sperm quality of men in Loma Linda California and what they found what it was was that it was very poor in vegans and vegetarians and they had poor motility they had very poor numbers of sperm suggesting that this blue zone was not quite as ideal as they had hoped”

“when you actually look at people in Loma Linda so these same sort of vegetarians and the seventh-day Adventist study if you look at those people and you look at their sperm quality you can see that their sperm quality is very low”

“furthermore inadequate sperm hyperactivation and vegans suggested comprise membrane calcium selective channels and so it's you know I've joked about this and said I don't know what part of loma linda males is actually blue but i suspect it's they're balls like blue balls but it's uh you know it's pretty striking”

“in loma linda there's plenty of studies that show that the the reproductive quality of the males quantified by their sperm numbers and motility is abysmal in vegetarians and vegans compared to omnivores”

“the complete exclusion of meat being very harmful for the sperm quality”

“Loma Linda is the only one of the blue zones where meat is not eaten in significant quantities but research done here shows that vegans and vegetarians have very poor sperm numbers and sperm motility”