Natural Iodine (Kelp / Potassium Iodide)
Thyroid & energyFunction & benefits
The essential building block of the thyroid hormones (T4 and T3); iodine contributes to normal thyroid hormone production and thyroid function, normal energy-yielding metabolism and normal functioning of the nervous system (EFSA).
Dosage & how to use
| Recommended dose | 150–225 µg daily (adult requirement 150 µg, 200 µg in pregnancy and breastfeeding according to EFSA) |
| Best time to take | With breakfast |
| Frequency | Once daily |
Best forms to choose
Precisely dosed potassium iodide, or organic kelp extract that is standardized and tested for a consistent dose and freedom from arsenic.
Important warnings
The EFSA upper limit for adults is 600 µg a day
Excess is dangerous with autoimmune thyroiditis (Hashimoto's) and nodular goitre, as it can suppress the gland or trigger overactivity
Unstandardized kelp products can contain widely varying amounts of iodine
Drug interactions
It interacts with antithyroid drugs, lithium, potassium-sparing diuretics and ACE inhibitors; consult your doctor.
Related supplements
- Daily MultivitaminsGeneral health & immunity
- Omega-3 Fish OilGeneral & heart health
- Vitamin D3 (Cholecalciferol)General health & bones
- Magnesium (Glycinate/Citrate)General health & nerves
Scientific references
- EFSA Journal 2014;12(5):3660 (Dietary Reference Values for iodine)
- NIH Office of Dietary Supplements (ODS): Iodine Fact Sheet
- WHO: Assessment of iodine deficiency disorders and monitoring their elimination
Content last updated: 17 October 2026 · Based on published sources and research (EFSA / NIH / PubMed)
⚖️ Medical disclaimer: The information and data provided here are for health education and nutritional guidance only. They are not a medical diagnosis and never replace a direct consultation with your doctor or pharmacist. Always consult your doctor before starting any supplement, especially during pregnancy or breastfeeding or when taking long-term medication.