Biochemical Reaction of Iodine in Human Body-Part 2

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.