Also as an adjunct to what David says about electrically charged iodine's importance in relation to the negatively charged thyroid... here's a video explaining the biochemistry and ultimate importance behind ionization energy. I believe medical Science has mistakenly confused the body only with a basic chemical (test tube) device rather than it being an electrical organism.
The first I read of this in terms of the thyroid and Iodine was in Max Gerson's "A Cancer Therapy, Results of Fifty Cases". A few snippets:
"The electrostatic hypothesis claims that in living protoplasma the electrical charge cannot be guessed according to the charge in distilled water in the inorganic laboratory...
This series includes the positive half of both acids and alkalis, represented by lithium, sodium, calcium and iodine as one group, and the electronegative half of the series, characterized by potassium, phosphate, citrate and sulphate as the other group....
The thyroid is an electronegative center or cathode of the body, very small, and therefore with a small amperage, but with a high voltage in the colloid...
...According to the analyses of the alkali metals, found deposited in the thyroid. we may conclude that the thyroid as a whole is relatively electronegative and that the colloid in it's follicles(60% in normal thyroid) has a rather high negative voltage."
Here's a discussion on this in a book entitled "Secrets of an Alkaline Body: The New Science of Colloidal Biology" found on google books. It appears that the author lifted straight from Gerson on this segment:
"Bjorn Nordenstrom claims to have found a hertofore unknown universe of electrical activity that is the very foundation of the healing process. If he is right he has made the most profound bio-medical discovery of the century!"
Funny that the same things keep getting re-discovered and thought of as "new"