I think you're on the right track wombat, because I felt really good on the day I took 50 mg, but the following day at 62 mg, near the end of the day I didn't get the bad headache, or sore chest sternum at all this time. But I got really tight neck, shoulders, the anxiety was making me so tense that I had rather worrisome shortness of breath. So I stopped for a few days, and started at a lower dose. So I think my body is detoxing from taking the Iodine faster than it can handle. But my energy or chi is very weak according to two accupuncturists, so I personally probably can't detoxify as well as the average person. But still experimenting. Thats what its all about, to find what works best for each of us unique individuals. Thank you all for contributing your thoughts.