1. Introduction
Iodine is an essential micronutrient and an integral component
of thyroid hormones. Iodine is obtained only through
the diet and is mainly absorbed by the gastrointestinal tract
as the inorganic anion, iodide. The status of iodine nutrition
of a population is determined by measurements of iodine as
urinary iodide (UI) concentration since it is considered an
indicator of the adequacy of the iodine intake of that population.
In general, it is assumed that most ingested iodine,
such as sodium or potassium iodide, is excreted in the urine,
and that equilibrium is established between dietary iodine
intake and UI excretion. The assessment is of urinary iodide
anion concentration; nevertheless, it is common to refer to
the laboratory tests as urinary iodine tests.
1. IntroductionIodine is an essential micronutrient and an integral componentof thyroid hormones. Iodine is obtained only throughthe diet and is mainly absorbed by the gastrointestinal tractas the inorganic anion, iodide. The status of iodine nutritionof a population is determined by measurements of iodine asurinary iodide (UI) concentration since it is considered anindicator of the adequacy of the iodine intake of that population.In general, it is assumed that most ingested iodine,such as sodium or potassium iodide, is excreted in the urine,and that equilibrium is established between dietary iodineintake and UI excretion. The assessment is of urinary iodideanion concentration; nevertheless, it is common to refer tothe laboratory tests as urinary iodine tests.
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