Tuesday, March 15, 2011

More About Potassium Iodine

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Amplify’d from www.health.harvard.edu

The small, butterfly-shaped thyroid sits just below the voice box. From this perch, it controls how fast every cell in the body changes food into energy. The gland’s main product, thyroid hormone, governs the function of the digestive tract, brain, heart, nerves, muscles, bones, skin, and more.

Iodine is a key ingredient that goes into making thyroid hormone. We get this element from ocean-caught or ocean-farmed fish and shellfish, milk, cheese, yogurt, eggs, and fruits and vegetables grown in iodine-rich soil.

Iodine-131 gets into the body several ways. A person can breathe in radioactive steam released by a nuclear power plant. Fallout—radioactive particles that fall out of the atmosphere and settle onto plants, soil, and water—further adds to the burden when a person eats iodine-131 enriched fruits and vegetables or drinks water containing the isotope. Milk is another vehicle—cows that eat grass sprinkled with iodine-131 make milk that contains it.

As my colleague Peter Wehrwein describes in a related post, taking potassium iodide pills can help keep iodine-131 from taking up residence in the thyroid gland. The seafood-rich Japanese diet provides an abundance of iodine. Because the thyroid glands of those affected by fallout from the failing nuclear power plants may be “full” of natural iodine, iodine-131 may not be able to get into the gland, giving them natural protection against radiation-induced thyroid cancer.

Harvard Health Publications
See more at www.health.harvard.edu
 

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