Potassium is a mineral found in all cells of the body, and is very important for normal function of skeletal and heart muscles. Low potassium blood levels can be caused by steroids which causes the kidneys to remove more potassium from the blood which can result in heart rhythm problems. Low urine potassium levels are seen in people with vomiting and diarrhea that leads to dehydration, poor absorption of potassium from food, poor diet, or Addison's disease. High urine potassium levels are seen in people with Cushing's syndrome, excessive intake of licorice, diuretics (water pills), or kidney failure. Urine potassium levels are dependent upon diet; high urine potassium levels are the result of a high dietary intake of potassium.
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