Much of what you wrote, I have read about, but you put it into a context I could better understand. Though I'm still slightly confused as to how
it all works
. The more I research, the more I'll learn. I will add I do take B12 sublingual drops and a multivitamin, though I'm not certain it has ferritin. Biotin and D, yes.
My RT3 came back, and he also ran T3 Uptake. The results are:
T3 Uptake% - 34 (28-41)
Rt3 - 17.