Reverse T3 Test
An inactive form of T3 that the body produces during stress, illness, or low-calorie states.
What is Reverse T3?
An inactive form of T3 that the body produces during stress, illness, or low-calorie states.
Reverse T3 Reference Range
These are the typical adult reference ranges used by major US labs. Your report will include the specific range used by the lab that processed your sample.
| Population | Range |
|---|---|
| age 18+ | 8.00 – 25.0 ng/dL |
Reference ranges are educational. Always interpret your result with the specific range printed on your lab report and discuss anything outside the range with a clinician.
What your Reverse T3 result may mean
Can reflect physiological stress, illness, severe dieting, or certain medications.
Educational only — not a diagnosis. Many factors can influence a single result. Discuss anything that concerns you with a healthcare provider.
Sources
Related Thyroid biomarkers
Markers commonly tested alongside Reverse T3.
Frequently asked
No. TestWell's licensed physician network reviews and approves your order — usually within minutes. You can place an order online without an in-person visit or a referral from your own doctor.
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