I tried posting this yesterday. I hope it doesnt show up and double post me...I've heard it said that meat is vital to the brain. So I looked up some links:
On the brain's evolution:
06.14.99 - Meat-eating was essential for human evolution, says UC Berkeley anthropologist specializing in diet
On toddler brain development:
Fortified Milk And Red Meat Aid Toddlers | VisitBulgaria.info - Latest Newspaper Headlines, Current Events
On brain regeneration:
Science Links Japan | Meat Protein and Brain Function
I havent too thoroughly researched this but it I think it does stand to be looked at further if you are planning on pursuing a vegetarian diet or raising children vegetarian. I.e. are there amino acids, or something else, in meat that you cant find in other foods and that is important for brain function and development?