Collection Instructions
A 24-hour urine iodine collection measures the total amount of iodine excreted in the urine over a 24-hour period:
- Refrain from taking iodine supplements or eating iodine-rich foods for at least 24-48 hours prior to the test.
- Begin the collection in the morning, after the first morning void, and discard that urine.
- Collect all urine over the next 24 hours in a clean, dry, and sterile container provided by the healthcare provider or laboratory. It is important to collect all urine during this time period, even if you do not feel the urge to urinate.
- Keep the container in a cool, dark place, such as a refrigerator, during the collection period to help preserve the stability of the urine sample.
- At the end of the 24-hour collection period, provide the healthcare provider or laboratory with the urine sample, following any additional instructions provided by them.
- Record the start and end times of the collection, along with any medications or supplements you may be taking during the collection period, and any urine that was missed during the collection period.
What we test
Urine Iodine (24hr)
Iodine is an essential cofactors for proper thyroid function.
Creatinine is a waste product that your body makes when you use your muscles or when your body digests meat. Healthy kidneys remove creatinine from your blood, and it leaves your body in your urine. This test can find out whether your kidneys are working normally or to see if treatment for kidney disease is working.
Iodine is an essential trace element and an integral component of thyroid hormones. Thyroid hormones are required for normal growth and development of tissues and maturation of our bodies. Approximately 80% of iodine is excreted in the urine, making it a good marker of the previous day's intake.
Iodine levels can be adjusted for urine dilution using creatinine. This adjustment accounts for differences in urine volume or concentration and allows for a more accurate assessment of iodine status.
Test instructions
Download and print your pathology form from your i-screen dashboard.
Take your form to one of our affiliated collection centres to have your sample taken - no need for an appointment.
Cease iodine supplements for 3 days before the test.
Results for this test available in 10-12 days and will be published in your online dashboard.
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