The rabbit experiments sounded convincing and I was under the impression that KI did indeed prevent atherosclerosis. The thing was that is did not prevent atherosclerosis in rabbits with their thyroid removed so you would get the impression that it is due to the effect on the thyroid. Dessicated thyroid also prevented atherosclerosis in these rabbits.
I don't worry about it because I am mostly vegan.
I think that he just lies about how much he takes.
Maybe he is euthyroid?
PS. I am now in the kelp-only club. 1-3 mg of time-released kelp Iodide a day.