I can certainly second your testimony. I did not have a constipation problem before and even with lots and lots of salt, all kinds of supplements etc, my digestive tract is working better with Iodine at 100 mg and more daily, than it ever did.
My sister who is on 50 mg is also experiencing a further relief of constipation troubles with iodine. She initiated fiber in January and that helpe her go daily, but Iodine helps her go almost as often as she eats. And she loves it. Relief of a life long problem.