I have toxic goiter what food should i eat and avoid?

Get treated: Diet matters little or noting. You have graves disease or less likely one or more hot nodules. This will first make your life totally miserable and then kill you unless you accept definitive treatment (surgery, radioactive iodine) and until then the medication that will control it. Despite what you may read on the internet, diet and supplements aren't the key in managing life-threatening disease.

Get treated: The important thing is to get treated. Iodine containing foods would not be good in high amounts, but otherwise there are no restrictions. Don't use decongestants, aspirin, Dilantin while your thyroid level is high. Check new meds w/your doctor before starting them, even otc>.