Re: Nascent iodine vs. Iodoral or Lugol's or Organic kelp or potassium iodide or...your opinion?

As already suggested by Jsusnme, 26 months earlier, try Iodoral tablets. According to Optimox, the maker of these tablets, colloidal silica is utilized in the tablet specifically to avoid gastric upset:

"Because administration of I[odine] in liquid solution is not very accurate, [it] may stain clothing, has an unpleasant taste and causes gastric irritation, we decided to use a precisely quantified tablet form containing 5 mg Iodine and 7.5 mg Iodide as the potassium salt. TO PREVENT GASTRIC IRRITATION, the iodine/iodide preparation was absorbed unto a colloidal silica excipient; and to eliminate the unpleasant taste of iodine, the tablets were coated with a thin film of pharmaceutical glaze."

http://www.optimox.com/iodine-study-1

This quote is taken from the last paragraph of the introduction.