Goran, found in vegetables like collards, Brussels sprouts, and kale, can inhibit radio iodine uptake by the thyroid.

“if you read this paper you will see that radio iodine uptake to the thyroid is inhibited by 194 micro molar of trim and what they say is that there are multiple vegetables collards Brussels sprouts and some Russian kale that contain significant amounts of Goran to potentially decrease iodine uptake by the thyroid”