Yes, it's all in their heads but the lower 1/3rd of their head.
When our immune system is struggling with battles going on in our dental work, it has a hard time fighting other things and pushing out toxins. Getting rid of the compromise in our mouths can make a huge difference when supplementing with iodine and other supplements for health.
I believe this is why I am not seeing big benefits from iodine due to a root canaled tooth and some cavitations.