Distilled water is demineralized. Also i can't get it here in the uk. I believe in the 'usa' you can buy it at the drugstore. I read on another post about metabolism going down 20% which worries me as i'm trying to raise mine. I still have lowish temps, and don't think i am on an optimal dose of thyroid med yet.
I think you are right, i need some professional guidance with this. Alternatively i might fast one day a week, fruit fast maybe. Better than nothing.