Aw, gee, I'm sorry that didn't work. It was like cardboard to me, and I was pretty indifferent to it, so chewing it up was no problem.
I've wondered the same thing about me. Certainly not damage from the iodine, but for the same reasons we were taking iodine in the first place. But it can't be ruled out we're missing cofactors to make thyroid hormone from the iodine in the thyroid. And even if our thyroids can make the hormone, 80% of that is T4 (plus the T4 coming in the desiccated thyroid). T4 is converted to T3 out in the cells of the body, and every brain cell has its own manufacturing plant as well. T4 to T3 requires adequate ferritin, magnesium, and cortisol not too high and not too low. I'm learning what's adequate ferritin for somebody else isn't high enough for me.
Once I felt that T3 "hit," there was no going back. I just wanted more.
I suspect my thyroid itself may be inadequate, since I grow a goiter so fast when my TSH rises, as if it's straining under the stimulus. The goiter disappeared taking desiccated thyroid. But unquestionably there's a cellular conversion problem. You'll know if you hit a snag and start feeling both agitated and still-symptomatic on some dose. When the T4 doesn't convert, it's very irritating to my nerves, and the T4 gets stored into reverse T3, which uses up the T3 receptors and won't let the T3 in the meds do its job.
But, sufficient unto the day is the evil thereto. I'm so happy you're doing better. You've given so much to me through your writing over these years. It's a pleasure to have been an emissary for you this time.