I posted this in another area, for Ben Howell but as yet no reply, and I was hoping that someone with a scientific brain (I don't have) might comment to see if it makes sense.....
I thought it might be useful if it does, for me to explain myself to my GP and endocrinologist, as even if they don't agree it might give them cause to think if I give them the latest research.
I am diagnosed with both hypothyroidism and ME/CFS, the hypothyroid condition long before the ME/CFS, so it's properly recognised with high TSH (at the time before treated)....I took T4 only for 17 years before I began to explore other options due to lack of function (by this time I also had the ME/CFS label).
Having read a lot around the subject I understood that there were some on T4 only who believed that their T4 only medication was not being converted in the body to T3 very efficiently, thus meaning that their hypothyroid condition was not well managed, and they still felt ill in many ways. Blood tests may show all is OK with the TSH, but they are unable to check the tissues which may show a different story.
NOW.... if this new research indicates that we with ME/CFS are in a state of hypometabolism, would this not impact on the way someone who was on T4 only would convert to T3 in the body? Depending on how ill we were at any one time, then everything would slow down? Might this not be an explanation to people who say we need T4 only? (as happens a lot in the UK).