Most people associate iodine exclusively with thyroid health — but this essential mineral plays a far broader role in the body. From breast tissue and ovarian function to fetal brain development and endometrial health, iodine is active in virtually every organ system. Deficiency is more widespread than commonly recognised, and standard thyroid blood tests cannot reliably detect it. This guide explores the extrathyroidal roles of iodine, the difference between iodide and molecular iodine, the controversy around dosing, and why testing urinary iodine is the most accurate way to assess your status.
By Tracy Tranchitella The use of iodine dates back to 4th century China where seaweed and burnt sea sponge were effectively used to treat goiter. It was not until 1811 that iodine was isolated as a specific element that exhibited properties similar to the other halogens of bromine, chlorine, and fluorine. In 1829, Jean Guillaume Auguste Lugol, MD, introduced potassium iodide as an effective treatment for the effects of tuberculosis, and John Murray, MD, used iodine to treat croup, asthma, consumption, and other respiratory diseases [1]. Tincture of iodine has been a staple in every first aid kit for the...
Heavy metals like mercury, arsenic, and cadmium can silently disrupt brain chemistry, mood, and cognition — while nutrient deficiencies in iodine, selenium, and lithium compound the damage. Learn how element testing reveals what's really affecting your mental health.
Iodine is an essential trace element required for thyroid hormone production, yet many people are unknowingly deficient. While iodised salt and seafood are well-known sources, dairy products, eggs, and seaweed also contribute significantly to daily intake. Changing dietary habits — including reduced milk consumption and the replacement of iodine with bromine in bread production — are quietly lowering iodine intake across the population. This article explains where dietary iodine comes from, why the body needs it, how it is absorbed and excreted, and how at-home urine testing can confirm whether your intake is adequate.
Iodine deficiency is more common than many realise. This guide walks through how to assess iodine status using dietary recall, symptom profiling, and a three-part laboratory panel — including thyroid function, thyroglobulin, and urinary iodine and bromine testing.
