The best information that I have found is from the American Civil Defense Association website (www.tacda.org). Here is an exerpt:<br><br>It appears that the "correct" form of iodine is potassium iodide. The iodine tablets in your PSK are NOT suitable, as there is not the correct amount of iodine, nor is it the correct form.<br><br>Hope this helps. Their reference to "RadBlock" is their proprietary product. It is not expensive. There has been enthusiasm in North Carolina to stockpile and/or distribute KI to people living within a certain radius of the state's nuclear power plants. Seems like sound preventive medicine to me. I have mine!<br><br><br>Certain forms of iodine help your thyroid gland work properly. Most people get the iodine they need from foods like iodized salt or fish. The thyroid can “store” or hold only a certain amount of iodine. In a radiation emergency, radioactive iodine may be released in the air. This material may be breathed or swallowed or ingested with food and drinks. It may enter the thyroid gland and damage it. The damage would probably not show itself for years. Children are most likely to have thyroid damage. If you take Potassium Iodide, it will fill up your thyroid gland and block the uptake of dangerous radioactive iodine. This greatly reduces the chance that harmful radioactive iodine will enter the thyroid gland. <br>RAD BLOCK™ Tablets are packaged in bottles of 200 tablets. Each yellow/white, round, scored tablet contains 65 MG potassium iodide (that yields 50 MG of ingestible iodine). The slightly yellow surface is caused by a “clear” coating to prevent any bitter taste. <br>In the aftermath of the Chernobyl nuclear power plant disaster, many children most likely developed thyroid cancer or thyroid abnormalities because they did not receive the protection afforded by radiation blocking pills, such as RAD BLOCK ™, prior to exposure to even small amounts of nuclear fallout. The World Health Organization said this of the Chernobyl disaster: <br><br>"The result, less than fifteen years after the accident, is more than 1000 cases of thyroid cancer, most probably solely attributable to this single release of radioactivity to the environment … In the most affected area in Belarus, the yearly incidence (of thyroid cancer in children) has risen … more than 100-fold compared to the situation before the accident. … This increase in incidence has been documented up to 500 km from the accident site". <br>If the countries that surround the Chernobyl nuclear power plant had not given out millions of doses of KI pills (like RAD BLOCK ™), thousands of more cases of cancer may have developed. [Note: As of the year 2000, while recommended by the U.S. government and many research groups, the U.S. still does not widely stockpile KI pills as in done in many other countries.] Please see our article on Nuclear Power Plant Hazard Issues for reasons why this is a major problem in the U.S. today. <br><br>The US Food and Drug Administration (FDA) recommends taking Potassium Iodide only when public health officials tell you to do so during a radiation emergency (such as a major nuclear power plant disaster or with an explosion either involving nuclear materials or an actual nuclear fission or fusion bomb detonation). In a radiation emergency, radioactive iodine could be released into the air and cause potential health risks for up to hundreds or even thousands of miles (in the case of large nuclear weapons explosions). <br><br>Potassium Iodide (KI), a form of Iodine that is quite different than that used to purify water, used to formulate Rad Block tablets, can help protect you by preventing the uptake of radioactive iodine into your thyroid. note: the thyroid, as opposed to the rest of the human body, is extremely vulnerable to even low levels of radioactive iodine. <br><br><br>Directions for Use / Daily Dose:<br><br>Use as directed by a physician and as directed by public health authorities. <br>Adults - 2 tablets taken once per day <br>Children 3 to 12 years of age - 1 tablet taken once per day<br>If a child cannot swallow this pill, the pill should be crushed and administered in milk, juice, jam, soda, etc. – to eliminate the bitter taste – taken once per day. <br>Children 1 month to 3 years of age - One-half (½) tablet crushed and stirred into solution with juice, milk, jam, or formula . taken once per day <br>Neonates (birth to 1 month of age) - Only a single administration of one-quarter (¼) tablet crushed and stirred into formula, breast-milk, milk, or water should be given to neonates who are in their first week of life outside of the womb, even for premature babies, unless otherwise specified by a physician. If approved by a physician, subsequent doses of one-quarter (¼) tablet crushed and stirred into formula, breast-milk, milk, or water may be given to neonates after their first week of life if there is a continuing hazard. <br><br>Pregnant and nursing women may take this product (although be sure to refer to the WARNING section that follows) but should consult a physician prior to continuing daily dosages after the second day. Adults and older children should take this tablet preferably with milk or food to limit any potential adverse gastrointestinal response. If only a limited number of RAD BLOCK ™ or similar pills are available, these should be given to infants, children and young adults first as its effectiveness (and also the risk of thyroid cancer) drops off with adults over 40 years of age. Adults 40 and over should not take KI beyond 1 day unless directed to do so by a physician (or unless the adult is continuing to be exposed to high levels of radioactive iodine that threaten thyroid function). <br><br>Potassium Iodide (KI) should be taken as soon as possible after public health officials tell you and if at all possible, prior to or shortly after radiation exposure. Dangerous radioactive iodine can be blocked by nearly 100% if taken prior to radiation exposure and can still block 50% even hours after exposure. You should take one dose daily (per the preceding paragraph’s guidelines). More will not help you because the thyroid can “hold” only limited amounts of iodine. Larger doses will increase the risk of side effects. You will probably be told by health authorities not to take the drug for more than 10 days after the end of exposure to nuclear radiation (but note the Daily Dosage section above and the Warning section below for pregnant and nursing women and for neonates and for those 40 years of age and older). In the case of a nuclear power incident, this may be less than two weeks total dosage time. In the case of a major nuclear war (even if overseas) or with nuclear materials terrorism incident, authorities may recommend taking KI for 100 or more days for children and young adults.