In my opinion and the opinion of many others including my Dr. too many rely on the TSH reading only and it is not a good indicator. It is better to get the Free T3 and Free T4 readings and use those as the primary indicator of thyroid function. Most people do better with their Free T3 and Free T4 is in the 60% to 70% of range, but everyone is different.

One problem with the TSH reading is that if you are taking a natural thryoid hormone such as Armour it will suppress your TSH readings. This is normal and if it doesn't suppress the TSH reading then something else might be wrong.