Iodine, Random Urine Test
This test measures iodine concentration in a random urine sample, an element required for thyroid hormone production.
About this test
Iodine is an essential element the body needs to make thyroid hormone. Quest describes urinary iodine measurement as serving as an index of adequate dietary iodine intake, rather than as a direct measure of thyroid function itself.
The sample is a 10 mL random urine collection, gathered in a sterile, leak-proof container with no preservative, and analyzed using Inductively Coupled Plasma/Mass Spectrometry (ICP/MS).
Test details
| Collection | Quest patient service center |
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Quest resources
Additional details
What this test looks at
The test reports urinary iodine concentration from a single random urine sample. Quest frames this specifically as an index of dietary iodine adequacy, not as a thyroid function test on its own.
This test isn't part of the Celio Health store at the moment, so it can't be ordered or requested here. The test menu lists everything that can.
Laboratory results should always be interpreted by a licensed clinician who knows your health history. This page is information about a test, not medical advice.
Frequently asked questions
What does this test measure?
It measures iodine concentration in a random urine sample. Iodine is an element the body needs to make thyroid hormone.
How is the sample collected?
A 10 mL random urine sample is collected in a sterile, leak-proof container with no preservative.
Do I need to prepare for this test?
No preparation instructions are listed for this test, though people follow any instructions their ordering clinician provides.
Why is urinary iodine measured?
Quest describes it as serving as an index of adequate dietary iodine intake.
Is this a thyroid function test?
No. It measures iodine as an index of dietary intake; it does not report thyroid hormone levels.