Description: The Thyroxine (T4), Free test may be used to evaluate thyroid function or detect hyperthyrodisim or hypothyroidism. The Free T4 is often done with a TSH test and may be used to evaluate infertility issues in women. Turnaround time for the Free T4 test is typically 1 business day.
Requirements: This thyroid test has no fasting requirements. Collection should not occur during or after administration of heparin.