Hormone Health Hub: Expert Insights on Testing, Balance & Better Living — iodine and fertility

Nearly 2 billion people worldwide are iodine deficient — and many don't know it. Discover why iodine is critical for thyroid health, who is most at risk, and how a simple at-home urine test can reveal your levels.

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.

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.

Infertility affects 1 in 8 couples worldwide — yet many are rushing into expensive IVF without first addressing the hormonal imbalances that may be silently undermining their chances. In this wide-ranging clinical discussion, Dr. Alison McAllister of ZRT Laboratory shares her expertise on the hormonal causes of infertility in both men and women, the key tests that are too often missed, and the complementary strategies that can dramatically improve outcomes.