Hi, My husband just got his body check up and his tsh level is 0.003 which is extremely low but a very normal range for ft3 & ft4 which is 3.91 and 1.45 respectively. He is an active gym going person and has been taking protein supplements since some years. He has a problem of losing weight rapidly and has a mildly hoarse voice. The ultrasound of his throat is diagnosed as normal. Does he have hyperthyroid? Are the supplements causing it? Should we start the medicines for hyperthyroid? Thanks!