Reverse T3 Test in Mesa

Service Description

Walk in or book online for your Reverse T3 Test in Mesa today. About This Test Your body turns T4 into T3, the hormone that actually runs your metabolism. Under stress, illness, injury, or long-term dieting, it can route that T4 into reverse T3 instead — a version that fits the same receptors but does nothing. Standard thyroid testing will not catch this. Your TSH looks fine, your T4 looks fine, and you still feel exhausted and cold. Reverse T3 is the marker that shows whether your conversion is going the wrong direction. What's Included Reverse T3 — measured by LC/MS/MS, the more precise method. Who This Test Is For Anyone with clear thyroid symptoms whose standard labs keep coming back normal. People recovering from serious illness, surgery, or prolonged physical stress. Patients on thyroid replacement who never improved on treatment. Anyone working with a functional or integrative provider who asked for reverse T3 specifically. What to Expect & Preparation Preparation: No fasting required. If you take thyroid medication, come in before you take your dose for the day. Your Lab Visit: A quick, 15-minute blood draw. Walk in Monday through Friday, or book online. No doctor's order and no insurance needed — we generate the lab order at check-in. FSA and HSA cards accepted. Turnaround Time: Your results are posted to your secure patient portal within 2 to 4 business days. Reverse T3 is read against Free T3, not on its own — the ratio between them is what tells the story. The Full Thyroid Panel with Antibodies includes both plus four more markers in one draw. Note on Turnaround Times: Processing times are estimates and are not guaranteed. Reference laboratories may require extra time for confirmatory testing, sample re-runs, holidays, or unexpected equipment delays.