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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.
They are used as nutrition supplements to prevent goitre and other iodine deficiency in human body. They are used in organic synthesis as well. Potassium iodide has been used as a mucolytic agent. Potassium iodide is used as a heat stabilizer and a catalyst in synthetic fiber manufacturing.