I had a vegan friend that started going through organ failure due to malnutrition. His doctor advised him that if he didn't start eating meat, it might kill him. He now loves a nice rare steak, rarely has seconds on the salad, and is in better shape than he had been in 10 years.
Does anyone recall a guy who used to eat wild hickory nuts on TV commercials. Can't recall his name, but I remember he keeled over of a heart attack at a fairly young age.
I had a vegan friend who insisted his girlfriend would have to eat a vegan diet during her pregnancy and lactation if she wanted to have his baby.
She left him.