I have had Hashis for 40 years, and had radioactive iodine after diagnosis. I am on Levo 125mg, get regular checks and tsh is ok according to the info on this site - but I can't lose weight no matter what I try - been the same weight for years although I've tried every diet going! I need to lose about 2 stone and am getting very depressed about it.Read that sometimes a selenium supplement can boost the conversion of t4 to t3 - in those that are deficient - and that going wheat free can also help. I asked GP about being tested for t3 and t4 levels, but although he did request this on the lab form ( I have a copy of the form so I know he did )the Lab DIDN'T do it! So where do I go from here - as until I know what my t3 level is, I am at a dead end, and all I can do is use nutritional supplements - hence this plea for any suggestions/ideas Anyone got any other ideas.... please!