Your hypothyroidism is due to your poor diet high in sugars, which could also be causing your brain problems, or at least is exacerbating them.
Poor diet poisons the liver which causes other organs to dysfunction and ultimately fail.
Do you think sugar, HFCS, honey, nectar and juice are food?
There you go. They're actually all as poisonous as alcohol.
Feel lied to?
So did I.
"Sugar: the Bitter Truth " on YouTube
"Fat Chance..." by Dr. Robert Lustig M.D.