Hi Renee21, the EFI rules and IF are summarized on the insoluble fiber page in these sentences "One glance will tell you these insoluble fiber foods are the best (and tastiest) around, but your colon simply can't handle it if you eat them with abandon. You absolutely must eat insoluble fiber foods, and as much as safely possible, but within the IBS dietary guidelines." And there is a more extensive discussion in this newsletter in the section on The Fifth Sneaky Sin of the IBS Diet where is says "insoluble fiber is a huge potential trigger". Throughout the web site and in her books Heather talks about the trigger effects of IF, particularly cereal bran, which can cause spasms resulting in D, C or A.
For some of us eating as much IF as possible means eating very little.
Glad to hear you have learned how to manage the IF/SF ratio to your satisfaction.
-------------------- STABLE: ♂, IBS-D 50+ years - Science of IBS