...eliminating SOY as an option for ingesting (if you haven't already). Soy is bad for a LOT of different reasons. (I realize you weren't discussing soy, but I wanted to add this, 'just in case' :)
--- Not a complete protein
--- Not a natural food
--- Many contaminants
--- Extreme processing
--- Hydrogenation
--- Soy protein isolate
--- Genetic modification: DNA roulette
--- No soy for infants
--- RoundUp and the international herbicide market
--- Europe's stance on genetic engineering
--- The end of biodiversity
--- What the real experts say
--- Who really runs the FDA and EPA