I just wanted to add my experience. I bought a tincture of iodine and found it would disappear within 8hrs (overnight). I had recently been diagnosed with a thyroid nodule and thought it might be due to iodine deficiency. I started also seeing a naturopath who has advised me to take an iodine supplement. I took a 24hr iodine test and was found to be very deficient. My thyroid specialist has advised me to avoid all iodine supplementation including kelp... sigh... So I am not sure where to go from here...but since my levels are checked monthly, I may just start with small amounts of iodine and not the large dose the naturopath recommends. He wants me to take 12.5mg per day which is 12,500 ug. The recommended daily intake for an adult is 150ug. On top of all this, I am pregnant! Ha ha! My advice to everyone here... take iodine before you have a problem... take the recommended daily intake or even a little more. I sure wish I had known beforehand that I was deficient. Now with the pregnancy and the functioning nodule, I don't want to make things worse with iodine supplementation. How do we ever know what to do? LOL