Yeah, I went vegan for 3 days ... I felt so ill afterwards. I need to eat some dairy, because I simply don't eat healthy enough not too. Man cannot live on pretzels alone!
I went vegan for couple of months... then i became a little anemic and i was passing out more often than i usually do.
Yea, I knew this guy that was a strict vegan-he said that he had enough energy, but he always looked like he was about to fall over-just didn't look healthy. I think some people's metabolisms are better suited to those kinds of diets than others.