Is an allergy to shellfish related to an iodine allergy?

Is an allergy to shellfish related to an iodine allergy?

Shellfish allergies are sometimes confused with iodine allergies. That’s because shellfish often contains iodine. But having a shellfish allergy doesn’t necessarily mean you’re allergic to iodine. If you have a shellfish allergy, you don’t have to worry about reactions with radiocontrast material. (Certain diagnostic imaging scans use radiocontrast material, which contains iodine.)