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Potassium salt is often used as a substitute for regular sodium chloride salt (the salt you find on your kitchen table), and for good reason. Most people in the United States take in too much salt on a daily basis, which may put them at risk for hypertension, heart attacks and strokes.
Sodium iodide, as well as potassium iodide, is commonly used to treat and prevent iodine deficiency. Iodized table salt contains one part sodium or potassium iodide to 100,000 parts of sodium chloride.