Sometimes, it feels like rT3 dominance is like the thyroid hormones T1 and T2...that is, real or myth? Is it metabolically active on its own or is it simply an inactive byproduct of T4 and T3?
Many articles online claim rT3 dominance (rT3 is often referred to as the "hibernation hormone") can cause hypothyroidism although you take high doses of NDT or T4, as too much T4 is converted to rT3 which then blocks the activity of free T3. The solution proposed is to go on T3 only, or cut back on NDT/T4 and take no more than 50 mcg/1.5 grains daily, and then add as much T3 as you need to clear your system of excess rT3. This is said to take 3-6 months.
But is rT3 dominance a real thing, or just a myth...? I just found the following article that pretty much says it is:
Any ideas or personal experiences...?