Potassium is a mineral found in all cells of the body, and is very important for the normal function of both skeletal and heart muscles. Low blood levels are seen in people with burns, trauma or surgery, cystic fibrosis, Cushing's syndrome, diarrhea and vomiting, the use of diuretics (water pills) or steroids, excessive ingestion of licorice, and not enough potassium in the diet. Low blood levels can cause heart rhythm problems. High blood levels are seen in people with crush injuries, infection, dehydration, kidney failure, or too much potassium in the diet.
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