I never heard of this seaweed before. I did some research, and, yes, it is one of the best supplements for those with hypothyroidism. Thank you for this post. It was very informative for me, as I have hypothyroidism, and I am really sick of the hormone therapy I am on. It only masks the symptoms (not even adequately enough) instead of taking care of the problem. So, I am looking for a natural way of curing my hypothyroidism.