Iodine
I
Description
"Iodine" test evaluates iodine levels in your blood to assess thyroid function and detect deficiency or excess. Low iodine may impair thyroid hormone production, leading to fatigue, weight changes, or goiter. Elevated levels might suggest overexposure or thyroid dysfunction. Doctors often recommend this test for individuals with dietary concerns or unexplained thyroid symptoms. Results guide care plans, including supplements or dietary changes. Regular iodine testing helps maintain hormonal balance and supports long-term metabolic and thyroid health.
Test Category
Trace Minerals, Minerals
Procedure
Invasive
Sample Type
Blood – Serum
Units
Micrograms Per Liter | Micromoles Per Liter
Procedure Category
Blood Draw
Test Group
Complete Thyroid Group, Mineral Group, Complete Nutrient Deficiency Group
Test Group Description
Complete Nutrient Deficiency Group: This comprehensive group includes an expanded panel of tests covering a wide range of vitamins, minerals, and other essential nutrients. Complete Thyroid Group: A comprehensive array of tests for a thorough evaluation of thyroid function, providing detailed insights into thyroid health and associated conditions. Mineral Group: By assessing various parameters related to mineral levels and balance, it provides insights into overall mineral status and associated health considerations.
Optimal Range
For All Individuals:
Conventional Unit: 40.0–92.0 µg/L
SI Unit: 0.31–0.72 µmol/L
Normal Range
For All Individuals:
Conventional Unit: 52.0–109.0 µg/L
SI Unit: 0.41–0.86 µmol/L
Results That Differ From The Norm (Direct and Indirect Causes)
Increased levels may indicate:
Excessive dietary intake
Excessive iodine supplementation
Iodine-based contrast agents
Medications (such as amiodarone)
Povidone-iodine solutions
Decreased levels may indicate:
Key Reasons For Testing
Thyroid Function: Assesses iodine’s role in thyroid hormone production to diagnose and manage thyroid disorders.
Iodine Deficiency: Identifies deficiency to prevent goiter, hypothyroidism, and developmental abnormalities.
Supplementation Monitoring: Tracks iodine levels during supplementation to ensure proper intake and avoid excess.
Nutritional Status: Evaluates dietary iodine intake, particularly in at-risk groups like pregnant women.
Health Status Conditions It May Be Used To Assess
Currently, this test is not directly associated with any conditions listed on the Health Status page. However, it may be included as part of a broader set of tests linked to specific health conditions.
Some Prominent Medical Labs That May Offer This Test
Please note that this particular test has not been associated with any of the listed prominent medical labs. We recommend enquiring with your private physician or nearest hospital to determine where this specific test can be performed.
References
Important Note
Any medical procedure yielding results outside the norm may be directly or indirectly linked to the conditions outlined on this page. Various factors, including genetics, medication and supplement usage, recent illnesses, pregnancy, pre-test eating, smoking, and stress, can impact the test's outcome. Additionally, factors like false positives, false negatives, inaccurate analyses, and others can influence results.
Reference ranges, which help healthcare professionals interpret medical tests, may vary depending on age, gender, and other factors. They may also differ between laboratories due to variations in instruments and methods used. Optimal ranges are designed for preventive purposes, aiming to identify trends and potential risks early, while normal ranges reflect conventional laboratory values indicating no current disease or pathology. Your healthcare practitioner may have specific reasons for testing that deviate from the usual or may interpret results differently based on individual circumstances. Proper interpretation typically involves considering clinical findings and other diagnostic tests. Hence, it is crucial to provide your healthcare professionals with a comprehensive medical history, consult with them for result interpretation, and follow their guidance for potential re-testing or additional diagnostics.
Disclaimer
This content is provided solely for informative and educational purposes. It is not intended as a substitute for medical advice or treatment from a personal physician. Regarding the interpretation of their medical test results and/or specific health questions, it is recommended that all readers and viewers consult their physicians or other qualified health professionals. The publisher is not responsible for any adverse health effects that may result from reading or following the information in this educational content. Before beginning any nutrition, supplement, or lifestyle program, all viewers, especially those taking prescription or over-the-counter medications, should consult their physician or health care practitioner.
Please note that while prominent lab names are included in this content, we cannot guarantee that these labs offer all the tests mentioned. For confirmation, individuals should contact the labs directly or consult their medical practitioners. The information provided reflects general knowledge at the time of publication and may not include recent updates or emerging research. Readers should verify details with qualified professionals to ensure the most up-to-date and accurate guidance.
[1] Zimmermann MB, Boelaert K. Iodine deficiency and thyroid disorders. Lancet Diabetes Endocrinol. 2015;3(4):286-295.
[2] Pearce EN, Andersson M, Zimmermann MB. Global iodine nutrition: where do we stand in 2013? Thyroid. 2013;23(5):523-528.
[3] Farebrother J, Zimmermann MB, Andersson M. Excess iodine intake: sources, assessment, and effects on thyroid function. Ann N Y Acad Sci. 2019;1446(1):44-65.
[4] Bürgi H. Iodine excess. Best Pract Res Clin Endocrinol Metab. 2010;24(1):107-115.
[5] Leung AM, Braverman LE, Pearce EN. History of US iodine fortification and supplementation. Nutrients. 2012;4(11):1740-1746.
[6] Bath SC, Steer CD, Golding J, Emmett P, Rayman MP. Effect of inadequate iodine status in UK pregnant women on cognitive outcomes in their children: results from the Avon Longitudinal Study of Parents and Children (ALSPAC). Lancet. 2013;382(9889):331-337.
[7] Taylor PN, Okosieme OE, Dayan CM, Lazarus JH. Therapy of endocrine disease: impact of iodine supplementation in mild-to-moderate iodine deficiency: systematic review and meta-analysis. Eur J Endocrinol. 2014;170(1).
[8] Laurberg P, Nøhr SB, Pedersen KM, Fuglsang E. Iodine and the thyroid gland. Endocrinol Metab Clin North Am. 2001;30(2):339-356.
[9] Zimmermann MB. The adverse effects of mild-to-moderate iodine deficiency during pregnancy and childhood: a review. Thyroid. 2007;17(9):829-835.
[10] Delange F, Hetzel BS. The iodine deficiency disorders. Thyroid. 2000;10(8):713-715.
[11] Caldwell KL, Makhmudov A, Ely E, Jones RL, Wang RY. Iodine status of the U.S. population, National Health and Nutrition Examination Survey, 2005-2006 and 2007-2008. Thyroid. 2011;21(4):419-427.
[12] Glinoer D. The importance of iodine nutrition during pregnancy. Public Health Nutr. 2007;10(12A):1542-1546.
[13] Zimmermann MB, Ito Y, Hess SY, Fujieda K, Molinari L. High thyroid volume in children with excess dietary iodine intakes. Am J Clin Nutr. 2005;81(4):840-844.
[14] Hetzel BS, Delange F, Dunn JT, Ling J, Mannar V, Pandav CS. Towards the global elimination of brain damage due to iodine deficiency. Indian J Pediatr. 2002;69(8):589-596.
[15] Aburto NJ, Abudou M, Candeias V, Wu T. Effect and safety of salt iodization to prevent iodine deficiency disorders: a systematic review with meta-analyses. WHO Guideline. 2014;91(5):529-542.
[16] Andersson M, de Benoist B, Rogers L. Epidemiology of iodine deficiency: salt iodisation and iodine status. Best Pract Res Clin Endocrinol Metab. 2010;24(1):1-11.
[17] Li M, Eastman CJ. The changing epidemiology of iodine deficiency. Nat Rev Endocrinol. 2012;8(7):434-440.