Hormone Health Hub: Expert Insights on Testing, Balance & Better Living — selenium and thyroid health

Selenium is an essential trace element with a critical role in immune function, antioxidant defence, and thyroid health. Research links selenium deficiency to increased viral replication, more severe infection outcomes, and a higher likelihood of viral mutation into new strains. Heavy metal exposure from mercury and arsenic can further deplete selenium, compounding the risk. This article explains the science behind selenium’s role in viral protection, the geographical link between selenium-deficient soils and emerging infectious diseases, and how at-home ICP-MS testing can confirm whether your selenium levels are adequate.

Normal thyroid blood tests don’t always explain why patients still suffer from fatigue, cold intolerance, brain fog and weight gain. In this in-depth clinical article, ZRT Laboratory explains the critical role of selenium in thyroid hormone synthesis and T4-to-T3 conversion, how heavy metals like mercury and arsenic sequester selenium and inactivate protective antioxidant enzymes, and why this can trigger Hashimoto’s thyroiditis — even when TSH, T4 and T3 appear normal.

Selenium is an essential trace element required for thyroid hormone activation, antioxidant defence and selenoprotein synthesis — yet it is one of the most commonly overlooked nutrients. Too little increases cancer risk; too much is toxic. This article explains the different forms of selenium found in food and supplements, which forms are best absorbed, their anti-cancer properties, and how to determine whether your selenium status is optimal.

Thyroid cancer is now among the top 10 most common cancers worldwide, with incidence rising by an average of 5.5% per year. But experts are divided: is this a genuine epidemic, or an epidemic of diagnosis driven by more sensitive imaging? This article reviews the evidence on both sides, explores the role of iodine deficiency, radiation exposure and environmental factors, and explains why thyroid awareness — and monitoring — matters year-round.

The thyroid gland is under constant threat from modern life — oestrogen dominance, chronic stress, iodine and selenium deficiency, heavy metal toxicity and xenoestrogen exposure all suppress its function. This article outlines 7 key action steps you can take to protect your thyroid, from hormone rebalancing and stress reduction to targeted nutritional support and testing.