I am not on thyroid meds. They all said it was normal. What is the ideal number?

I asked the surgeon about testing for vitamin and l-carnitine deficiencies. The response was she has no experience on the subject and to check with a primary care provider.
I could also talk to a nutritionist though I don't know if they can order blood tests.

I'll ask about a complete hormone panel.

Who should order the tests: surgeon, RO, or internist?

Like before, I am sensing resistance as if they don't care or want to help with fatigue, as if it is not their field and they are just interested in performing Tx.