I haven't found nutrionists to be helpful. The ones I've seen just give you the standard info most GIs will give you... low residue diet, bland, etc.
On the other hand, there are alot of good books on dietary modifications for people with IBD. The top ones I'd recommend, in order of strictness, are:
Breaking the Vicious Cycle
Listen to Your Gut
The New Eating Right for a Bad Gut
There are others out there. Do a search on Amazon.
There are no naturopaths in my area, so I've had to educate myself. In addition to dietary modifications, I've found the following supplements to be invaluable: Natren probiotics, omega-3, l-glutamine, wild oregano oil and George's aloe vera.
Diagnosed with ulcerative colitis spring 1999.
Maintenance dose sulfasalazine.
Probiotics, l-glutamine and fish oil caps. George's aloe vera juice. Oregano oil antibiotic, antiviral, antifungal. Long-term remission with only minor blips.