Originally Posted by Mark in Idaho

ConcussedCanuck,

There are some essental amino acids that are only available in meat protein. Eggs and milk will help if you consume enough. If you are a vegetarian from an animal abuse perspective, eggs and milk/cheese are your source.

The issue is not quantity of protein but the kind of essential amino acids available in the protein you eat. The studies show a markedly smaller brain mass in vegetarian and vegan diet people.