I am a Hashimoto's sufferer (35 yrs) and have never felt well. I have been reading and absorbing slowly the things you need to do to make sure that your T3 is being converted properly before moving on to try other things. I started with the normal blood tests and found that I had Vit D3 insufficiency. I started immediately taking supplements (10.000u) daily as recommended by my extensive research. Six weeks later (the time it's supposed to take to get the levels up) I am feeling so much better, certainly less depressed, more energy and a certain "lightness" that I can't put my finger on. Also my weight has started to come off in a teensy weensy way, nothing drastic, whereas before despite my activity and low calorie/low carb intake it had been static. Then to my horror I suddenly started to get bouts of a really bad Cardiac Arrhythmia (I suffer from this anyway but it has been under control for about 30 years). It's quite distressing because what's happening seems to be what all the "bad" Dr's say will happen about suppressed TSH and raised FT3 and T4. I haven't even started on my other low results yet like Folate, Iron etc. I can't believe I've got to go crawling to my GP and say "sorry you were right". I haven't done that yet, I am hanging on wondering what to do next!