Now that we know what labs to order for a proper thyroid workup, let's talk about thyroid ranges for these.
I always let patients know that these lab ranges do not operate in a vacuum. Basically, this means I look at them from a functional perspective. How are they working (or not working) together and are things working properly and efficiently?
But at the same time I think it's important that you have a rough idea of what numbers we're looking and aiming for.
I like this below 2.0, especially if someone is on thyroid medication, even more so if they are on natural desiccated thyroid (NDT) medications. Examples of these are nature-throid, armour thyroid and WP thyroid. This is the least important lab to me when someone is on thyroid medication but it's often the only lab that is checked (unfortunately!).
I like this greater than 1 and up to around 2.
This is the most important number. Generally I like this between 3-4, even up to 4.5. This number will vary with NDT depending on how long before getting labs drawn you took your medicine. Ideally labs would be drawn 3-4 hours after your last medication dose.
My range for this is below 15 but some people vie for less than 12.
I generally utilize the normal lab range for these and they seem to work just fine.
What else do you need answers for?