Fascinating seeing these words in the context of a medical trial:
The use of thyroid hormone liothyronine in patients with heart failure
Liothyronine (T3) is a safe tablet and has few side effects because it is a synthetic version of triiodothyronine, a naturally occurring hormone produced by the thyroid gland. The side effects of this medicine usually only occur from excessive dosing.
bepartofresearch.nihr.ac.uk...
Obviously, I've only taken a tiny quote and it now appears out of context.
The trial itself appears considerably more interesting than the OPAL (get off levothyroxine) trail discussed in this other post:
healthunlocked.com/thyroidu...
Have edited title of post as Pearce is not prime contact - just the study comes under Newcastle.