I also used to drink soy milk every morning and would get gas/bloating in the afternoon. I switched to vanilla rice milk, which is really good! I actually like it better than soy milk. I agree with the others that Beano can work wonders for preventing gas caused by soy. Give it a shot. I'm also a C, and a vegetarian, and I just try to eat a good amount of IF with every meal. If I don't get enough IF, I end up with C. But you have to find a balance - don't overdo the IF!
Good luck, Lisa, IBS-C
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Lisa, IBS-C (Vegan)
Stable since July 2007!
Mommy to Rhiannon Marie (Dec. 13, 2008)