Hi, going to see GP today to ask for a referral to an endocrinologist - the endocrinologist wants my free T3 and T4 to be tested prior to my seeing them - is that a good sign? What exactly are free T3 and T4? Am I right that it is best to fast prior to any thyroid tests? Can anyone recommend a good thyroid book where I can get sine more in depth information.
Thanks so much for your help in advance,