If you have a shellfish allergy, can you have radioactive iodine therapy or thyroid test?

Shellfish & Iodine : Shellfish allergy is a sensitivity to one ir more proteins. Iodine is an element and not large enough to be an allergen. Shellfish allergy and radiocontrast media (rcm) sensitivity have nothing to do with each other, "old wives tale". Rcm sensitivity is due to the hyper-osmolarity of the rcm's effect on basiphiic mediator release. Neither related to thyroid medication intolerance, .