The thyroid gland is like a precision instrument that requires the right amount of iodine to function properly. Excessive iodine intake can lead to the Wolff-Chaikoff effect, causing a temporary shutdown of hormone production. Influences promoting high-dose iodine supplementation may be counterproductive, and the solution may be to take less iodine. The importance of proper testing and a balanced approach to iodine intake is emphasized.TakeawaysWolff-Chaikoff effect causes temporary shutdown of hormone productionHigh-dose iodine supplementation may be counterproductiveBalanced approach and proper testing are crucial for iodine intakeChapters