My mom was Vegan for years. Then she became allergic to beans, including soy beans. The Dr told her she would die if she didn't get protein from somewhere, and meat was one of the places she had to go. Even with some nuts she was getting pretty sick. There are essintial amino acids that only meat provides.
I liked the In N Out Burger bumper stickers when people altered them to
In N Out Urge

that gave me a craving also!