Excretion of Iodine
Almost all iodine(~80%-90%) is excreted in the urine because kidneys have no mechanism to conserve iodide. Therefore, iodine deficiency can be identified by urine test. There is about 20% of iodine secreted in feces.
To calculate daily iodine intake :
urinary iodide(mg/dl) x 0.0235 x body weight (kg)
Groff J., Gropper S., and Smith J. (2009). Advanced Nutrition and Human Metabolism.(5th Edition). Belmont, Ca: Wadsworth.
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