Does consuming soy protein cause GI problems such as gas and bloating?
"People who eat large quantities of soybean based foods complain of bloating, flatulence, and indigestion in greater numbers than people who eat meat based protein…People vary in their degree of tolerance to soy foods. Some people have no problems eating them, particularly in smaller amounts, but when larger quantities are eaten especially in conjunction with an overall high fiber diet, indigestion and gas may result."
http://www.associatedcontent.com/article/2031240/is_soy_hard_to_digest.html?cat=22