Vegans can be and are healthy individuals. I'm not one, nor would I ever want to be, but I have family that have been vegan for years now and they live a productive life with very few ills. Possibly less than omnis. It is a strict lifestyle, and like others have said, if anyone followed their diet as strickly as Vegans, they would be just as happy.
I'm fine with it as long as they don't try to feed me soyburgers!
Jim Smith