HI, I HAVE HAD GRAVES DISEASE AND HAVE HAD RADIO IODINE TREATMENT ABOUT 8 YEARS AGO, I RECENTLY HAD A BLOOD TEST , T4 18, T3 THEY DIDNT CHECK AND TSH 15, WHICH SHOULD BE BETWEEN .5 AND 5.0, THE DOC SAID THIS IS NORMAL DUE TO MY THYROID NOT FUNCTIONING ANY MORE BUT I RECALL MY ENDOCRINOLOGIST SAYING IT SHOULD BE AROUND 1.0, YOUR THOUGHTS , THANKS PETER