Reverse T3

Description

Reverse T3 (rT3) is an inactive form of the thyroid hormone T3 (triiodothyronine). While Free T3 helps regulate metabolism, energy, and cellular function, Reverse T3 binds to the same receptors but does not activate them, effectively blocking the action of active thyroid hormone. Elevated rT3 levels can contribute to thyroid resistance, fatigue, weight gain, slow metabolism, and stress-related thyroid dysfunction. Measuring rT3 provides a deeper look into thyroid conversion issues that may not be detected through standard thyroid panels.

The Process

A simple blood draw is performed to measure Reverse T3 levels, helping identify whether excess conversion of T4 into rT3 is interfering with proper thyroid hormone activity.

What’s Included

Blood collection by a professional
Laboratory measurement of Reverse T3 (rT3)
Detailed lab report with reference ranges
Secure and confidential results delivery

Disclaimer

This test is intended for monitoring and informational purposes only. Please consult a licensed healthcare provider for diagnosis or treatment of thyroid-related conditions.

Instructions

Fasting is not required, but a morning draw is recommended.
Inform your provider about any thyroid medications, as these may influence rT3 levels.

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