Re: Need some good advice before I get back on Lugol's.

One of the reasons people feel they may have an Iodine allergy is if they are allergic to shellfish or simply fish. Both shellfish and other fishes are a rich source of iodine, but often those allergic are not responding to the Iodine in the fish.

However, if one has a shellfish allergy, or any allergy for that matter, there is a slightly increased risk of “iodine allergy.” As compared to the person without an allergy to shellfish, people allergic to shellfish may show about a five percent greater chance of showing “iodine allergy” symptoms. However similar studies show that having any allergies increases the chance of being sensitive to iodine.


http://www.wisegeek.com/what-are-the-effects-of-an-iodine-allergy.htm