Hello – There is a lot of buzz about selenium in several areas; this is a link to a fairly recent review:
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http://www.ncbi.nlm.nih.gov/pubmed/23046013
It’s worth asking your doctor about, but I don’t see this as being an alternative to taking thyroid hormone replacement for someone who is hypothyroid. At our event in Boston last weekend, the presenters mentioned the concern cited in the above article about long-term selenium supplementation possibly increasing the risk of type II diabetes.
And definitely consult with a doc on dosing if you do decide to try supplementation, as as Selenuim can have negative side effects at excessive levels (gastrointestinal upset, fatigue, hair loss, and mild nerve damage).