Can You Take Iodine and Selenium Together?

Dose or timing may matter

The short answer

Iodine stimulates thyroid hormone production while Selenium activates deiodinase enzymes for T4-to-T3 conversion. Combined high doses may cause excessive thyroid hormone activation.

How to arrange timing

Both are essential for thyroid health but should be dosed carefully. Consider consulting a provider for proper ratios.

Reference

Reference noted for this combination: Journal of Clinical Endocrinology & Metabolism, 2010; 95(12): 5180-5188

Important context

Whether supplements suit you together also depends on dose, product formulation, health conditions, and medication use. Ask a doctor or pharmacist first if you take medication, are pregnant or breastfeeding, or have a chronic condition.