- Inadequate intake or metabolism of iodine.It directly affects thyroid secretions, which influence heart action, nerve response, growth rate, and metabolism. Simple goitre, the most frequent result, is most common in areas without access to salt water and is rare along seacoasts. Severe, prolonged deficiency can cause hypothyroidism. Eating seafood regularly or using iodized table salt will prevent iodine deficiency. Some countries have made dietary iodine additives mandatory.
* * *condition in which iodine is insufficient or is not utilized properly. Iodine is an element that directly affects thyroid gland secretions, which themselves to a great extent control heart action, nerve response to stimuli, rate of body growth, and metabolism.A simple goitre (enlargement of the thyroid gland) is the most common form of iodine deficiency illness and is found particularly in mountainous regions and areas far from salt water. The lowest incidence of this disease occurs along seacoasts. When the supply of iodine is only moderately deficient, the thyroid gland works harder to synthesize hormones in normal quantities, but the affected individual may continue in general good health despite the possible presence of goitre. In cases of severe and prolonged deficiency, however, there may be a deficit of thyroid hormones, resulting in hypothyroidism, a condition characterized by dry skin, loss of hair, puffy face, weakness, weight increase, fatigue, and mental sluggishness.Prevention of iodine deficiency is most simply accomplished by eating seafood regularly or by using iodized table salt. To overcome natural iodine deficits, government health officials in Canada and other countries have made dietary iodine additives mandatory.
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Iodine deficiency — Iodine is an essential trace element; the thyroid hormones thyroxine and triiodotyronine contain iodine. In areas where there is little iodine in the diet mdash;typically remote inlandareas where no marine foods are eaten mdash;iodine deficiency… … Wikipedia
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Iodine — (IPAEng|ˈaɪədaɪn, ˈaɪədɪn, or IPA|/ˈaɪədiːn/; from el. ιώδης iodes violet ), is a chemical element that has the symbol I and atomic number 53. Naturally occurring iodine is a single isotope with 74 neutrons. Chemically, iodine is the least… … Wikipedia
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iodine — /uy euh duyn , din/; in Chem. also /uy euh deen /, n. Chem. a nonmetallic halogen element occurring at ordinary temperatures as a grayish black crystalline solid that sublimes to a dense violet vapor when heated: used in medicine as an antiseptic … Universalium
deficiency — /di fish euhn see/, n., pl. deficiencies. 1. the state of being deficient; lack; incompleteness; insufficiency. 2. the amount lacked; a deficit. [1625 35; < LL deficientia, L deficient (s. of deficiens). See DEFICIENT, ENCY] Syn. 1. shortage,… … Universalium
Iodine — An essential element in the diet used by the thyroid gland to make thyroid hormones. The two most important thyroid hormones are thyroxine (T4) and triiodothyronine (T3). Thyroxine (T4) has four iodine molecules attached to its structure, while… … Medical dictionary
iodine — n. an element required in small amounts for healthy growth and development. An adult body contains about 30 mg of iodine, mostly concentrated in the thyroid gland: this gland requires iodine to synthesize thyroid hormones. A deficiency of iodine… … The new mediacal dictionary
iodine-127 — Stable, nonradioactive iodine, the most abundant iodide isotope found in nature; dietary deficiency causes simple goiter; used to block thyroid uptake of radioactive … Medical dictionary