What is the benefit of taking potassium iodide during a radiological accident?
What is Potassium Iodide? (chemical abbreviation is KI)
Potassium Iodide (KI) is used by health officials worldwide to prevent thyroid cancer in people who are exposed to radioactive iodides caused by nuclear reactor accidents and nuclear bombs. It protects against radioactive iodine by preventing its absorption by the thyroid gland located in the neck. Thyroid cells are unique among all cells of the human body as they are the only cells which have the ability to absorb Iodine. The thyroid gland absorbs it from the bloodstream and concentrates it inside the cell to produce hormones. For radiation that is not immediately lethal, the thyroid is your body’s most sensitive organ to the effects of radiation. The Radioactive Iodine is absorbed by the thyroid and can cause thyroid disease and cancer later on. Sometimes it only takes a short time if the victim is a child because a child’s thyroid is very active in helping the child to grow. FDA Approved IOSAT and ThyroShield saturates the thyroid with stable iodine, shutting off its absorption mechanism, and it will remain off long enough for the radioactive iodine that you inhaled or ingested to to be safely disbursed through the kidneys. IOSAT KI is the only FDA-approved full strength thyroid blocking tablet available to the public. ThyroShield is the only liquid Potassium Iodide approved by the FDA.
What is radioactive iodine?
One of the most feared consequences of a nuclear reactor accident or nuclear bomb is the release of a radioactive iodine plume into the environment. Radioactive Iodine (I-131) is a by-product of nuclear fission which occurs only within a nuclear reactor or during detonation of a nuclear bomb. What makes radioactive iodine so dangerous is that the body cannot distinguish it from ordinary iodine. As a result, if swallowed (in contaminated food or water), or inhaled (it can remain in the atmosphere for days), it will be absorbed into the thyroid gland (only the thyroid absorbs iodine) and may lead to thyroid cancer, especially in children. The value of Potassium Iodide (KI) tablets were demonstrated following the Chernobyl nuclear accident, where authorities began mass distribution of Potassium Iodide just hours after the explosion. In the years following the accident in areas where people received the drug, the incidence of thyroid cancer has not increased. But where Potassium Iodide was not distributed, previously rare forms of juvenile thyroid cancer have begun appearing at epidemic rates, with over 11,000 known cases. This number continues to rise and is not expected to peak until 2010.
When potassium iodide is ingested, it is taken up by the thyroid gland. In the proper dosage, and taken at the appropriate time, it will effectively saturate the thyroid gland in such a way that inhaled or ingested radioactive iodines will not be accumulated in the thyroid gland. The risk of thyroid effects is reduced. Such thyroid effects resulting from radioiodine uptakes due to inhalation or ingestion, or both, could result in acute, chronic, and delayed effects. Acute effects from high doses include thyroiditis, while chronic and delayed effects include hypothyroidism, thyroid nodules, and thyroid cancer.
