I get flare-ups of hyperthyroid symptoms - my test results have come back with the markers of graves disease. I have taken these symptoms to help with my hyperthyroid/jitteriness/insomnia/racing thoughts. If I take them for a few days - a few weeks and then re-take a thyroid test, my thyroid levels actually show remarkable improvement as my symptoms improve:
L-Tryptophan - 500milligrams - 3 pills up to 3X a day (without food)
Magnesium Chloride - 2 teaspoons 3X/a day (with food). I have also used Magnesium Citrate 1-2 teaspoons up to 3X a day. I think I prefer the Magnesium Chloride.
Magnesium Glycinate 400milligrams - up to 3X/day (with food)
Vitamin E - I know some doctors advise against taking large amounts of vitamin E so please check with your doctor. When I get very jittery vitamin E helps make me tired and calm me down so I'll take up to 800 iU a day of vitamin E as well.
These are the supplements that have significantly helped me. Please check with your doctor first!