I have begun iodine supplementation via Lugol's solution. I found via google search that the "Normal" test range for the T4 test is 4.5 to 11.2 micrograms per deciliter of blood. I shall request this test (or more appropriate test / suggestions?) from my doctor at my next appointment in a couple of months. My question is this (please bear with me) if one accepts that the current federal standards for iodine intake is perhaps 1% or even less that required for best health, are the current "Normal" test ranges for blood tests also much to low??? Thx in advance for any information you care to share....

Dr. Jerry Tennant ,in his 2010 book Healing is Voltage, cautions that current blood tests do not distinguish T4 from fake T4 in which one or more of the 4 Iodines to which the tyrosine is attached is replaced by fluorine, which will substitute for any halogen and render the hormone dysfunctional.
There appear to be no easy reliable answers here. If there is not a competent nutritionist with whom you can discuss your symptoms in detail, the best guidance may be to avoid fluorine and supplement a 12.5 mg Lugol's dose daily in accordance with instructions for intake and making sure to avoid problem interactions.
Dr. Tennant also mentions a couple of other rather striking points:

Although the thyroid gland uses iodine before other parts of the body, every gland that secretes something uses large amounts of iodine

The parts of the body exposed to the outside world have iodine levels 30 times the blood level.

Good one Cplus. Also Bromine is another halogen that will take its place in the thyroid displacing iodine. The thyroid is satisfied with this deception. Only therapy with an abundance of iodine can correct this.

Just realize that a whole nation, Japan, has a diet that provides at least 12mg of iodine daily. That includes all citizens no matter the age or health.

__________________
- Jim
https://www.natmedtalk.com/blogs/jfh

Cplus & jfh ; Thank you very much for your informative responses. I have been using the 12.5 mcg dosage seen elsewhere on this forum and will continue to do so. I won't waste my time with the T4 test.

Again Big Pharma rears its head! Until 15 yrs ago if you had hypothyroidism, they would give you PROLOID. (Dried sheep thyroid which has been standardized). It supplied T3 and T4. Now they give you synthetic T4 and that is it.