Description
The Reverse T3 test measures the level of an inactive form of the thyroid hormone T3 in your blood. While T3 is the active hormone that fuels your metabolism, reverse T3 (rT3) acts as a metabolic "brake," and elevated levels can slow down vital functions.
This test is valuable when thyroid symptoms persist despite normal TSH and T4 levels.
Why It’s Important:
- Evaluate Thyroid Function & Metabolism: Helps assess if your thyroid hormones are being properly converted to their active form.
- Distinguish Between Conditions: Differentiates true thyroid disease from other issues like chronic stress or nonthyroidal illness.
- Uncover Hidden Health Problems: High rT3 may signal underlying conditions such as liver dysfunction, kidney disease, inflammation, or uncontrolled diabetes.
Fasting not required.
This advanced test offers deeper insight into your metabolic health and thyroid function—especially useful when standard tests don’t explain your symptoms.
