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Urinary Iodine Test

The measurement of urinary iodine (IU) provides an accurate approximation of dietary iodine intake.  The majority of iodine that is ingested (90%) is excreted via the urine.  When there is adequate amounts of iodine in the body to support various bodily systems, the body offsets excess by excreting it in the urine.  UI measurements provide a biological indicator of Iodine deficiency disorders by determining whether the body has sufficient levels.

Iodine's main action is involved in thyroid function.  Due to the numerous actions carried out by the thyroid, the implications of iodine deficiency are significant.  The major hormone secreted by the thyroid is thyroxine, also called T4 because it contains 4 iodine atoms.  To exert its effects, T4 is converted to T3 by the removal of one iodine atom.  This occurs mainly in the liver and other tissues where T3 acts, such as the brain.  Other actions include the formation and integrity of normal breast tissue, foetal brain development and function, and anti-microbial effects.


Test Kit

Once the practitioner has given the patient their request form the patient can order their test kit online at Clinicallabs.com.au or by calling Australian Clinical Labs Functional Pathology customer service on 1300 55 44 80 between the hours of 9:00am and 5:00pm AEST. The test kit contains full instructions.


Specimen Requirements

One urine specimen collected from the first morning void (the first urine after waking in the morning).  The test kit provided contains everything required to complete the test.


Turnaround Time

The standard turnaround time for this test is 10 – 14 working days from the date the patient’s specimen/s are received by our laboratory.


Test Results

Patient results are delivered via electronic download unless requested otherwise. Results can also be issued via hardcopy, fax or web based e-viewer.


Technical Support

All Australian Clinical Labs Functional Pathology tests are accompanied by an Interpretive Guide to assist practitioners in their clinical understanding and patient management for each result. Australian Clinical Labs Functional Pathology also has experienced full time Technical Advisors available for practitioners to discuss appropriate test selection, interpretation of test results, individual cases and other technical matters. Please call 1300 55 44 80 between the hours of 9:00am and 5:00pm  AEST or email csfp@AustralianClinicalLabs.com.au