Lab Testing

Product Description

Please note, this test is performed by LabCorp and will not require a physical test kit to complete your draw. DHA Laboratory will send you a list of local LabCorp Patient Service Centers, patient prep instructions and a requisition form via email. Please print the requisition form and bring that in with you to LabCorp to complete your draw. If you have any questions about the tests, the testing process, or need help with your lab order at any time, please feel free to contact DHA Laboratory at T: (847) 222-9546 / E: info@dhalab.com

**Note: All laboratory testing requires an authorizing physician. DHA Laboratory offers a patient direct program that partners you with an authorizing physician. If you have any additional questions regarding the availability of testing, please contact our laboratory by telephone or email.**

Sample Type: Serum

Turnaround Time: 1 Week

Performing Laboratory: LabCorp

Reverse T3 is a biologically inactive form of T3. When T4 is converted to T3 in the body, a certain percentage of the T3 is in the form of RT3. When the body is under stress, thyroid hormone levels may be outside of normal ranges even though there is no thyroid disease present. RT3 may be elevated in non-thyroidal conditions, particularly the stress of illness.