Yes I’ve had both my FT4 and FT3 checked but am not sure how to interpret the results. What would be a high ratio that would indicate high reverse T3? Earlier on when I did not respond to the supplementation therapy my doctor did mention the possibility of conversion issues. But then he decided to put me on the DHEA instead to see if that might help. And it did somewhat. He has not mentioned the conversion issue since. In any case my FT3 and FT4 have always been within the normal range even if I had hypothyroid symptoms.
Of course being on desiccated thyroid supplement now probably affects the test results. Even though I do not take it before the blood test, as I understand, it tends to stay in the system a bit longer than a day so some of the previously taken thyroid would still be present. Apparently due to the high dose I am on my own thyroid has pretty much stopped own production by now, my doctor said.
I was really looking forward to getting my temps and heart rate up after starting the supplementation but there was very little improvement. After reading about the effects of cardio possibly shutting down the production of T3 I realised that I may need to stop exercising so much; having chronically exercised for nearly all my life I took two weeks completely off. Went really easy, even took a bus to work. Interestingly my temperatures started improving. I also noticed that when I restricted my diet my temperatures got lower, and when I increased my carb consumption my temperatures increased very soon, within a week. This is why, at least for me, I need to seriously consider that my hypothyroid symptoms may have been caused by years of restricted dieting and excessive exercising.
I agree, balance is the key. The tricky part is finding it.
Thanks for the Ray Peat interview link – will listen to it this weekend!