Hi , I have underactive thyroid and am currently on 100 mg levothyroxine daily. I haven't been feeling too well of late so gad levels checked however they only tested tsh and said normal with result of 0.48 range (0.45 to 5 ) usually my result is higher up the other way can anyone help with why this might be and if this could be why I don't feel so good. Mainly very tired , irratable no energy . Severe brain fog
Been diagnosed for 5 years now and still don't understand it.