Iodine, 24hr Urine


For: ,

Quest Diagnostics Test Code: 16602

Iodine a a naturally occurring element which is essential in the body for many functions. It is the main ingredient in all of the thyroid hormones, which are responsible for the maintenance of metabolism and energy expenditure. Abnormal levels of iodine can lead to hypothyroidism or hyperthyroidism. Iodine levels are usually measured once there has been an abnormal TSH, T3 or T4 test. This test measures the amount of iodine in the urine since it is excreted by the kidneys.

This test is performed in following conditions such as:

Signs and symptoms of hyperthyroidism
• Weight loss
• Increased heart rate
• Anxiety
• Difficulty sleeping
Signs and symptoms of hypothyroidism
• Weight gain
• Dry skin
• Constipation
• Cold intolerance


This iodine test has no fasting requirements.


Specimen Collected
  • Urine
Estimated Time Taken

Turnaround time for the 24 Hour Urine Iodine test is typically 1-3 business days.