Iodine is needed in the cells of the small intestines to produce carbohydrate digestion enzymes maltase, lactase, and sucrase... and doctors will tell Crohn's patients to eat fish to increase Iodine levels... but it looks like one of those diseases that nobody really knows enough about to say what exactly is causing it.
My partner was DX'd with Crohn's and it all started in his 20s.

Cloverbelle,
You have such a great question. I had no information on this subject. That problem is now fixed!

This might be close enough for government work:

Blog, "You’re probably Iodine deficient," by Cheryl

"My ulcerative colitis (AKA Chrohn's disease) went into complete remission for the first time in 10 years (after taking Iodine for 1 month)
http://sherylcanter.com/wordpress/tag/crohns-disease/

Summary of her Blog:
======================
1) Bingo! PubMed Study of Iodine & Crohns Disease vs iodine deficiency:
http://www.ncbi.nlm.nih.gov/pubmed/235826

2) "It’s also (iodine) heavily absorbed by the bowel (which is why iodine deficiency can cause inflammatory bowel disease)."
- reference to Brownstein

3) She could not tolerate 50mg a day, but did well at 37.5mg a day of iodoral, took her 6 months to become iodine sufficient per Hakala Labs testing kit.
http://www.hakalalabs.com/testing.html

4) "My thyroid nodules went away and my thyroid levels returned to normal."

Bottom line. This is such an excellent testimonial, I've added it to our Testimonials file:
http://tinyurl.com/iodine-testimonials

Many thanks for bring this subject up for discussion,
Grizz