The reference ranges are not normal, I’m afraid your doctor is just going by what she was taught in medical school and will forever be operating in the dark. In managed healthcare reference ranges determines normal status and you must be below these reference ranges to get treatment approved by your insurance company.
Your symptoms are part of the diagnosis and are being completely ignored because your doctor knows that if she provides you with treatment, because levels are within normal which are not really normal, the insurance company will refuse to reimburse your doctor for medical treatment.
It’s not your doctor saying no to treatment, it’s your insurance company, doctors are mostly robots now unable to take action unless insurance companies change and acknowledge that the reference ranges are wrong.
I doubt the insurance institutions will allow this changing of reference ranges, they will fight it because they stand to lose billions as people previously considered normal would now be eligible for treatment and it would cost insurance companies dearly.
Healthy people with no medical problems have a TSH between 1.0-1.5, this is the range for healthy people. Those people with medical problems is what’s considered the normal these days, because it’s normal for people these days to be unhealthy.
You want to strive for a health state that is optimal and your insurance will have no part of it. You need to quit wasting time with these sick care endocrinologists because they believe these ranges are normal and therefore can’t help you.
Reference ranges for TSH and thyroid hormones
Though TSH remains the most commonly used endocrine test in clinical practice, the issue of an appropriate TSH, and to a lesser extent, free T4 and free T3 reference ranges is still under debate. First of all the distribution of TSH reference range is not normal, with median values (also depending on population iodine intake) usually between 1-1.5 mU/. On the other hand, upper TSH reference limit is (assay-dependent) usually around 4.2-4.5 mU/L. There is also an argument that significant number of patients (up to 30%) with TSH above 3.0 mU/L have an occult autoimmune thyroid disease.
The evidence for a narrower thyrotropin reference range
It has become clear that previously accepted reference ranges are no longer valid as a result of both the development of more highly sensitive TSH assays and the appreciation that reference populations previously considered normal were contaminated with individuals with various degrees of thyroid dysfunction that served to increase mean TSH levels for the group. Recent laboratory guidelines from the National Academy of Clinical Biochemistry indicate that more than 95% of normal individuals have TSH levels below 2.5 mU/liter. The remainder with higher values are outliers, most of whom are likely to have underlying Hashimoto thyroiditis.