Pratt, I guess one of the first symptoms of liver problems for me was going from roasting at night to when I laid down, my feet went cold "inside" ... there was NO warming them, just a live-with-it kinda thing going on. The one thing that convinced me it was to do with my liver? A heating pad on my upper abdomen, my feet got warm. I've flushed and healed my liver enough that this problem has disappeared.
MHs products are herbs ... healthy foods ... I don't see them hurting ANYbody.
A couple of things that can help with the thyroid until you can specifically address the issue: coconut oil and kelp/iodine feed the thyroid.