[ernie]

Haven't read the whole thread but thought I'd chime in. I'm not a vegetarian and likely never will be. My wife has been in the past though no longer is. As many have pointed out protein can be issue but I want to break it down further...the problem is the 9 essential amino acids your body can't make (hence essential). That is what you'll need to concentrate your protein source investigation on...i.e. the complete protein sources. Quinoa, Soy and Buckwheat tend to be the predominant ones that get the most press. Given some of these proteins are significant carb sources so are often high calorie...it's shockingly easy to gain weight on a vegetarian/vegan diet.