6 year old body temp is 95.5

I have asked previously about what a proper dose of Iodoral would be for a child, but didn't get any responses. Dr. Brownstein recommends 1/2 tablet (6 MG). Obviously, from his temperature, he is showing some thyroid problems and I would like to nip this before it gets out of control and end up on meds like myself. Is Iodoral what I should start with? Does he need to take selenium as well? This is not in his multivitamin. Thanks all!