When I was diagnosed with Graves many years ago, I also had thyroid eye disease which was very neglected and caused much distress. If fellow members with this form of Hyperthyroidism have similar experiences, the link with selenium discussed in this article may be helpful:
I think this link give the full research document that the above article refers to:
Then the million dollar question: is selenium safe?
From this article it appears to say caution in large doses and it explains some interactions:
I'm not medically trained so have only posted this for information!