The use of a particular 'Iodine tablet' used in portable water purification has also been determined as somewhat effective at reducing radioiodine uptake. In a small study on human subjects, who for each of their 90-day trial, ingested four 20 milligram tetraglycine hydroperiodide(TGHP) water tablets, with each tablet releasing 8 milligrams (ppm) of free titratable iodine;  it was found that the biological uptake of radioactive iodine in these human subjects dropped to, and remained at, a value of less than 2% the radioiodine uptake rate of that observed in control subjects who went fully exposed to radioiodine without treatment. 
The recovery period was a shock. When the doctor said it would be two to three months, I thought, well maybe other people, but not me, I am fit! He was right, of course. For the first few weeks I struggled to go up a flight of stairs. I could not walk along the road and talk at the same time. This is, I discovered, multi-tasking for weakened lungs. It took me three months to feel better. Prior to this illness I had been going to the gym three times a week. I had to restart my gym regime slowly, and I can honestly say it was six months before I felt fully recovered.