My doctor advised me to take the lugol's iodine, selenium and magnesium for thyroid. That plus my multi vitamin/mineral powder which contains almost everything and quite a high dose of vitamin C.

I think it's over 400 mcg that selenium may start causing symptoms. I do not notice a problem on 200 - 300 mcg of selenium, but then in New Zealand we are very low in selenium in our soils, so this is why supplementing it in these doses is not as much of an issue. It might be in areas that already contain ok amounts. But over and beyond 400 mcg, I can start to notice some symptoms. You can get a garlic/sour kind of taste in your mouth and some numbness etc when you take too much.

It can also take a while for things to start working for thyroid, so you have to wait until you've been on these supplements for long enough to where things start working better again.

Thanks for the articles JK98 - informative as ever!