I know I'm not a doctor but to say that thyroid problems are due to parasites is very, very wrong. Some thyroid problems are hereditery and most times it's due to lack of iodine in the body and it deals with the hormones. There are many people in my family who have had thyroid problems. And I can guarantee it's not because we all had parasite problems. http://www.ehow.com/about_5093209_reasons-thyroid-problems.html