In addition to calcium and magnesium, potassium helps maintain normal Blood Pressure, and next to iron, potassium is one of the most commonly prescribed minerals, since some potassium is often lost when certain diuretics are prescribed. For the same reason, serum potassium is commonly measured as part of routine lab tests, although Lab Errors, are frequently encountered when several dozen variables such as improper fist-clenching collection technique, transport, centrifuge's spinning or g-force, hemolysis, etc, affect the accuracy of potassium measurements... Full Text