Hi everyone I have a question. Please can someone that understands Hashis respond. From what I understand Hashis your immune system attacks your thyroid gland because it sees it as a invader and sets out to attack it. My question is this, NDT is made of the same substance exactly as your thyroid. Does that not mean that your immune system will see it also as an invader also and set out to destroy it in the same way it is trying to destroy your thyroid?