The Reverse T3 test measures the level of reverse triiodothyronine (rT3) in your blood, a hormone that can indicate how your body is responding to stress and illness. Unlike Free T3, which is active, rT3 is an inactive form that can block the effects of T3. High levels of rT3 may suggest that your body is in a state of stress or illness, affecting metabolism and energy levels. This test is especially beneficial for individuals experiencing unexplained fatigue, weight gain, or thyroid dysfunction symptoms, providing deeper insights into how your body regulates thyroid hormones under stress.

Please note: This test is excluded from any promotional discounts due to the high cost of offering it. We strive to provide the best value for all of our tests and appreciate your understanding.