re: Didja ever notice?
Vegetarians and particularly vegans have difficulty including all the nutrients they need into their diet. Too many things you can only get from meat or have to go to a lot of trouble to get elsewhere and I'm not sure the "elsewhere" provides what the body needs.
I worked for several years in this one clinic where there was a dietitian who was a very attractive, knowledgeable nice lady and a vegetarian. She had the foulest breath of anyone I've ever known. I never knew her breath to be sweet. So there was something she was lacking in her diet.