Check out this site.  It contains information about nutritional causes and
treatments for thyroid disease (including both hypo and hyperthyroid).  It
is a huge site.  There is a lot of information here.

There are many sites on the web which discuss the work of various
practitioners who use nutritional supplements and dietary modification to
treat hypo and hyperthyroidism.  This is just one such site.  Some
practitioners have helped people who were on thyroid meds get off the meds,
using certain nutritional protocols.  This site has some such information.

It also discusses the hazards of RAI (RadioActive Iodine) treatment, which
increases one's risk of developing cancer and eye disorders.  Treating
hyperthyroidism with a RAI cocktail should have gone out with the dinosaurs!
(Are you reading this Trish???  Before you have your thyroid
destroyed....read this!  People who've had it done apparently regret it!)

http://ithyroid.com/

check it out.

Rachel