Specimen: Blood

Results: 1-3 business days

Description: Our Total T4 Test measures the total levels of T4 (also known as thyroxine) in the blood.  The Total T4 test, meaning it measures both Free T4 (thyroxine that has not bonded to proteins in the blood) and T4 that is bonded to proteins in the blood (most T4 is bonded). The T4 test is used to assess how the thyroid is functioning and to help detect imbalances with the thyroid, like hyperthyroidism and hypothyroidism. T4 is a hormone that plays a role in growth and metabolism. It is produced by Thyroid Stimulating Hormone (TSH).

*Please note: The result turn around time is an estimate only and not guaranteed. The reference lab may need additional time due to conditions with the weather, confirmation or repeat testing, or equipment maintenance and other reasons out of our control.