TargetedFoundationsVegan form available
Iodine
The building block of thyroid hormone; mild deficiency is common in Europe, especially without dairy or iodised salt. Too much harms too.
4/5Ā· RCTs / large cohortsEstimated monthly cost: ā 2 ā¬
Dose
150 Āµg potassium iodide daily if diet falls short.
Timing
Any time.
ā Cautions
With Hashimoto's or hyperthyroidism ask a doctor; kelp extracts can deliver milligrams of iodine ā avoid.
What it is
Need is 150 Āµg/day, 220ā250 in pregnancy. Main sources: sea fish, dairy, iodised salt, seaweed (the last can be too much).
What the evidence shows
WHO/IGN: 30ā40% of European adults fall short; over 80% of vegans. Deficiency raises TSH and fatigue; in pregnancy it affects the child's IQ.
Goals
Energy, fatigueHealthy years
Last reviewed: 6 September 2026
This site is educational and does not replace medical advice. Start any supplement or drug only after consulting a doctor or pharmacist.