What is Reverse Triiodothyronine?
Inactive T4 metabolite produced when the body shunts T4 away from active T3 production. Elevated in chronic illness, stress, and impaired conversion states.
Biomarker Reference · Reverse T3
Reverse Triiodothyronine (Reverse T3) is a clinical biomarker used in thyroid-endocrine assessment. Inactive T4 metabolite produced when the body shunts T4 away from active T3 production. It is measured in 1 laboratory test on BiomarkersLabs.com.
Inactive T4 metabolite produced when the body shunts T4 away from active T3 production. Elevated in chronic illness, stress, and impaired conversion states.
Elevated RT3 suggests impaired T4-to-T3 conversion — commonly seen in chronic fatigue, adrenal dysfunction, iron deficiency, and critical illness.
Reference ranges vary by laboratory and assay platform. Interpret in context of the issuing laboratory's stated range.
1 test on BiomarkersLabs.com include this biomarker.
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