11. Iodine
If you have thyroid issues, you probably know that iodine is crucial, because your body can’t produce it. However, try to take it from your diet. “Thyroid health and your entire metabolism are dependent on iodine,” says Bourque.
Some people tout the supplements as thyroid helpers; Bourque warns that if you already have a thyroid problem, taking excess iodine may exacerbate your condition. Excess iodine can also cause stomach problems, runny nose, and headaches. You should talk to your doctor before trying a iodine supplement.