I've noticed that if I haven't eaten a lot of soy products in a while, then eat a lot of them all in one day, my stomach will be rumbly, and it can make me gassy. Soy is a bean, so if beans affect you a lot, soy products mught too. I noticed it the other day when I ate a lot of soy yogurt, soy cheese, soy milk, and soy ice cream. Actually, come to think of it, it might just be the soy yogurt, because tofu doesn't seem to have the same effect. Anyway, it could just be the way a certain brand is processed, maybe a different brand would be better. It is also possible to find veggie patties that aren't soy based - I know President's Choice makes one available in Canada, but I don't know about in the US.