Ask the doctor: Is high potassium a problem?
Q. You have written about low potassium in the blood and ways to improve it, but I never read about too much potassium in the blood. Can you tell me why it happens and what is done about it?
A. Relatively few people develop high levels of potassium in the blood, since the kidneys are normally quite effective in clearing this mineral from the bloodstream. A normal blood potassium measurement is 3.7 to 5.2 milliequivalents per liter.