My thanks to DippyDame and others for your cogent analyses of serum T3 levels vs. tissue T3 levels. I have been self-dosing T3 for many years (stumbled upon its existence accidentally on an Internet website; a subsequent query, "Dosing T3," led me to Paul Robinson's most valuable books.
A petite female, 51 kilos, I am currently split-dosing a T3 liothyronine generic: 37.5 mcg at 7:30 a.m. (before breakfast), 37.5 mcg at 1:30 p.m., and 12.5 mcg at 7:30 p.m. An increase in dosage beyond 37.5 mcg at a time makes me feel shaky.
Since the start of the pandemic, my energy levels, hence day-to-day functioning have been spiraling downwards, to such an extent that today, I am weak, wobbly, and can hardly walk relatively short distances without stopping to rest. (No COVID; fully vaccinated). This, in spite of a healthy diet (relatively low-carb, gluten-free, little dairy, fish, eggs, lots of veggies and legumes, coupled with loads of vitamins and nutrients). Brain fog continues unabated, perhaps even worsening.
Even beyond the differences in serum vs. tissue T3 levels, I would go even further and propose that my healthy diet and plethora of vitamins are doing me no good whatsoever if all these nourishing substances don't leave the bloodstream, cross the cell membranes, and enter into the mitochondria, the cells' energy-producing factories, where they could do me some good. This makes no sense to me, and I'm not sure what to do to bolster my strength.
Thanks to all of you at Thyroid UK for your support and encouragement. Your comments are welcome.
My best,
chrysalis56