Does anyone have any information that can lead me in the right direction on hypothyroidism and weight loss. I had all the symptoms of having an underactive thyroid since the birth of my son plus weight loss. However I had never heard of the thyroid and got sent for various other tests, all of which were inconclusive. Then this year I had a blood test and was told I had an underactive thyroid and everything made sense apart from the weight loss, which I can't seem to put on. My blood test is now at 2.8 since being on 25mg Levothyroxine so is now deemed fine but this was the level last year when my symptoms were worse and have begun to get worse again like difficulty eating and insomnia so I am starting to lose weight again.