People refer to T4 to T3 conversion issues when blood tests show TSH and FT4 within range but T3 is low and this can be why hyPO symptoms remain. However, if TSH is low and FT4 is high this is indicative of being hyPER or overmedicated. If FT4 is high, will FT3 also be high? Which cause the hyper symptoms? I hope that makes sense!