Mine was 66 at one point and I could barely get out of bed! I would think at 400..I'd be at deaths door!
Someone reported a TSH of 400 this spring. Yes, thats what they said...........400!
It would have been interesting to know what their free T3/T4 was though.
I've been close to 60 and was really messed up, body was on the edge you might say. People began to notice too.