Iodine

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<p>The phrase 'essential 'element' is often incorrectly used to describe the nutrients we need, but can aptly be applied to iodine - without it we would suffer severe developmental problems. Iodine is a key component of thyroid hormones, responsible for the regulation of our metabolism. And yet most of us have no idea how much we need, nor where it comes from. </p><p>In her research, Margaret Rayman, Professor of Nutritional Medicine at Surrey University, has found pregnant women in particular are at risk of iodine deficiency - and there's a lack of iodine in what many consider healthy diets.</p><p>As well as looking at contemporary issues with iodine, Margaret explores the legacy of past iodine deficiency - the word cretin, was coined to describe someone living in the Alps with such a condition. We learn why you might find iodine in British milk - but not necessarily elsewhere in the world, and we discuss the consequences of exposure to radioactive iodine isotopes - both good and bad.</p><p>Picture: Pregnant woman with milk, Credit: Arief-Juwono/Getty Images</p>