Have you read the recent Dr.Brownstein material and listened to the Flechas (sp?) 2 hr radio program? Halogen theory has to do with widespread flourine/chlorine/bromine displacing iodine in the body which had more uses than just the thyroid. Ryan Drum (kelp harvester) recommends 1oz/day air dried, hand harvested Pacific Ocean kelp per day for therapeutic dosage. Not easy to come by and expensive. Just wondering how much you have studied the topic beyond Dr. Jarvis.