Iodine Contrast Dye Can Worsen Shellfish Allergies

Iodine is used in contrast dyes during computed tomography (CT) scans because it provides better cross sectional images of organs and blood vessels inside the body.Because shellfish contain iodine, many doctors believe that people with shellfish allergies should avoid iodine contrast,This is false, and a shellfish allergy has nothing to do with the reaction,