Do you recall any of the research.
Sorry, I don't remember any specifics, just the change when soy was finally found to be 'complete' accordiing to the research standards (Ie: will this protein source alone promote growth, and over generations?)
I wonder if the scientists doing this started with a preconceived notion of what would be the best protein sources (milk and eggs?) and went from there, or if they just decided to test various groups of rats with various types of proteins and see what worked, then determine from there what the protein requirements of humans really were (not too smart, as they later found out, when someone finally figured out that humans and rats aren't the same).
I don't even remember readiing one particular article or book about it, just little bits and pieces here and there. (So much for being the "long-term vegan memory" of the site!)
I wonder if a web search for "complete protein study" or "human protein requirements" or something to that effect would come up with anything useful?