My concern is health. Soy even fermented isn't that great. It is a trigger food for many as well. The amino profile is an issue too. Rice\pea is the closest I've found but lean poultry is the king of protein quality and until I see bodybuilders switching I'll stick with that. I know they also use whey which works for me but makes me put on fat. I have tried vegan and vegetarian, but after more than a month on each I never got out of the feeling fluish phase. Atkins did the same thing. So I just stick with vegetables, lean white meat, a few fruits, and a handful or two of whole grains and nuts a day. And some eggs, dietary cholesterol is not blood cholesterol.