This article www.sciencedaily.com/releases/2011/04/110420143620.htm
indicates that people may have different gut types, meaning different types of predominant bacteria in their gut.
It would explain why certain diet mod. doesn't work for some people and yet works for others, and the same for Rx meds which never did anything for me (except enemas which were helpful).
One "cure" does not fit all.
Current diet=SCD+Paleo modified (some fruit+dairy OK now)
In remission April 2010 after 10 years of UC with no remission ever
Jan 2010 began SpecCarbDiet (modified to remove dairy, fruit & juices,)
Gluten-free=bleeding stopped in 3 days, 95% remission in 5.5 months on SCD
(9)Balsalazide+(2)Citrucel, mesalamine enema as needed (1) VSL#3 nightly