Getting optimal numbers for your Thyroid once you start a protocol is to ignore your TSH and focus on the correct FT3 and FT4 numbers while ensuring that your cortisol and ferritin numbers are not out of line. This is how most of the good thyroid MD's handle treatment protocol. Mainstream MD's or PCP's typically look only at the TSH as this is what they are taught to do. (it's a very inexpensive test) They certainly won't do anymore than what they were taught. Where the teaching fails is MD's are told that if something starts to go wrong with a patient's thyroid the TSH will go out of range and that indicates there's a problem that needs attention. However lots of people have a normal TSH with very low FT3. In instances like this the patient suffers and the PCP believes they are normal. The other problem PCP's and general physicians have is they do not listen or care about symptoms. They have been taught to only look at the lab numbers, this is the biggest failing medicine has and why finding Md's like Defy is so important for us.