Avoid restaurant foods, as there is no reasonable way to determine which restaurants use iodized salt. Avoid if in doubt. Animals secrete dietary iodine into their milk. In addition, commercial milking machines are often cleansed with iodine solutions, as are containers and cows' teats. These are all high in iodine and should be avoided.
Fresh meat is acceptable.
Check the label on whole turkeys, turkey breasts and turkey cutlets. Many food makers inject broths into the turkey. If you are not sure, go to your local butcher for fresh turkey. Commercial bakery products. Vitamins and Food Supplements.