Hormone Health Hub: Expert Insights on Testing, Balance & Better Living — thyroid hormone production

Many patients produce sufficient thyroid hormone yet still suffer from classic hypothyroid symptoms. Why? Because standard TSH testing misses the full picture. In this clinical guide, Jim Paoletti explains the functional approach to thyroid assessment — examining T4 production, TBG binding, T4-to-T3 conversion, cortisol interference, ferritin and vitamin D — and outlines exactly which tests are needed for a complete analysis.

Environmental pollutants are in the food we eat, the air we breathe and the water we drink — and in excess, they can profoundly disrupt thyroid hormone synthesis and action. This article explains how iodine and selenium deficiencies develop, how antagonists like bromine, arsenic and mercury exacerbate thyroid dysfunction, and why urine testing for these five elements can reveal the hidden environmental drivers of thyroid symptoms that standard blood tests miss.

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.

Iodine is an essential component of thyroid hormones T3 and T4, and plays a broader role in antioxidant defence and breast health. Yet many people are unknowingly deficient. This guide covers the recommended daily allowances for different life stages, the best dietary sources of iodine — from kelp to cod — and when testing your iodine and thyroid levels may be warranted.