Reverse T3

Under certain conditions, the conversion of T4 to T3 can be impaired, resulting in high levels of reverse t3 (rT3). Although chemically similar to T3, reverse T3 is completely inactive and lowers the amount of active thyroid hormone available to the cells. A selenium deficiency, excess physical, mental and environmental stresses can all inhibit the deiodinating enzyme which is responsible for this conversion. This can be termed 'sick euthyroid' or 'low T3 syndrome'. Reverse T3 can be included in the Total Thyroid Screen on request.

Test Type: Serum Test

Analyte List
Reverse T3
Specimen Requirements
10ml serum