Is Kale bad?
Kale (and other cruciferous vegetables, including cabbage, Brussels sprouts, broccoli, turnips, and collards) contain a compound called isothiocyanates, which appear to block an enzyme in the thyroid. This enzyme, TPO, is responsible for attaching iodine to the thyroid hormones to make them active.
Basically, these vegetables are thought to block your body from using the iodine that it needs. If the thyroid doesn’t have enough iodine, the cells start overgrowing and the thyroid gets...