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iOSAT™ Maximum Strength 130 MG Potassium Iodide (KI) Thyroid-Blocking Agent for Radiation Protection (14-Unit Dose Tablet Package)


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No survival plan is complete without adequate protection against the harmful aftereffects of a nuclear or other radiological event.

Protect yourself and your loved ones with iOSAT™ — it’s the only thyroid blocking agent that’s approved by the U.S. Food and Drug Administration to protect against nuclear radiation emergencies. Potassium Iodide (KI), the active ingredient in iOSAT™, is clinically proven to protect against up to 99% of all radiation-induced thyroid damage when used as directed.

  • Over-the-counter FDA-approved thyroid blocking radiation protection
  • Maximum strength dose of 130 MG Potassium Iodide (KI) per tablet protects for 24 hours
  • Blocks up to 99% of radiation-induced thyroid damage
  • One 14-unit dose package provides thyroid blocking radiation protection for one person for two weeks
  • 7-year shelf life or longer under stable storage conditions
  • USE ONLY after a nuclear radiation emergency has been declared by public officials
  • Generally Recognized as Safe (GRAS) by the FDA
  • Manufactured according to strict FDA/GMP guidelines
  • Made in the USA

Each iOSAT™ 14-Unit Dose Tablet Package provides two weeks of thyroid blocking radiation protection for one person. Two 14-Unit Dose Tablet Packages per person (approximately one month) are recommended to maximize individual protection factor.

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SKU: IO1001 Category:


iOSAT™ received its approval from the U.S. Food and Drug Administration in 1982. It is the only maximum strength tablet for radiation blocking which may be legally sold in the USA.

How iOSAT Protects You From Radiation

Potassium iodide (KI), the active ingredient in iOSAT, is a stable iodine substance that naturally blocks the thyroid gland from absorbing harmful radioactive iodine. This method of radiation protection is extremely safe and proven effective, based on scientific study as well as real-world implementation. Up to 99% of all radiation-induced thyroid damage can be avoided by the use of iOSAT.

Is iOSAT Safe?

Potassium Iodide (KI) is Generally Recognized as Safe (GRAS) by the FDA. GRAS substances are proven safe and well-tolerated through years of common use and scientific study. Anyone who does not have a specific allergy to iodine may safely take iOSAT, including pregnant women, nursing mothers, infants and the elderly.

iOSAT Usage Instructions

Take iOSAT as soon as possible after public officials declare a nuclear radiation emergency. Do not take more than one dose every 24 hours.

iOSAT Dosage Ranges

In a nuclear radiation emergency, radioactive iodine could be released into the air. iOSAT protects only the thyroid gland from uptake of radioactive iodine. Use iOSAT along with other emergency measures to ensure maximal protection factor for you and your loved ones.

What Is The Shelf Life Of iOSAT?

iOSAT tablets expire in April 2024. According to FDA guidance on shelf-life extension, studies over many years have confirmed that potassium iodide (KI) is inherently stable with no significant chemical degradation when stored as directed on the label.