Hi! I need to know, please, when/how it is best to have thyroid hormones (Free T4, Free T3, TSH) & antibodies blood tests.
Does it matter which phase of the menstrual cycle one is in? Is there anything to be done or not to be done in preparation for the tests (like abstaining from certain foods)? Does the eating - not eating before the test affect the results? Is it better to have the tests in the morning?
I'll appreciate any information you consider necessary for the above mentioned tests.