Veggies bad for brains?

Research finds you can have too much of a good thing and that those eating an all vegetable diet can suffer the effects, such as brain shrinkage. Veggie diets can lack Vitamin B12 which is needed for good brain function apparently. Also contributing to brain shrinkage, consuming 14 alcoholic drinks or more a week and being overweight. So maybe we shouldn't eat all our veggies, Mom. What do you think of that? Read more about it here.