Oh I see. Sorry. It felt like you needed information on why some are taking so much. I was answering "i read somewhere that someone is taking 50 mgs per day -- is there a reason for this?" I was not trying to insult you by referring you to those articles.
Why is it missing from out diets? I suppose that can have a lot of answers. My feeling is that it is politics. I can't think of anything else. It is so cheap. I should never have been removed from bread and milk. Paranoia.
Regarding food sources:
Introduction to Nutrient Rating System Chart
The following chart shows the nutrients for which this food is either an excellent, very good or good source. Next to the nutrient name you will find the following information: the amount of the nutrient that is included in the noted serving of this food; the %Daily Value (DV) that that amount represents; the nutrient density rating; and the food's World's Healthiest Foods Rating. Underneath the chart is a table that summarizes how the ratings were devised. Read detailed information on our Nutrient Rating System.
World's Healthiest Foods ranked as quality sources of:
iodine