Iodine, Blood


For: ,

Quest Diagnostics Test Code: 16599

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 blood.

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


After completing their order, the person taking the test should go to the lab to obtain a specimen container and any necessary instructions. The Iodine 24hr Urine test requires people void urine at 8am and discard the specimen. Then collect all urine in 24-hour period, ending with final collection at 8am the next morning.


Specimen Collected
  • Blood
Estimated Time Taken

Turnaround time for the Iodine blood test is typically 4-9 business days.