Dear Dr. Donohue: I have a problem with high potassium. My test came back as 6.2, which the lab called “critically high.” My doctor says not to worry. He said the lab must have shaken the blood sample ...

Most of the potassium in the body is stored inside cells. Typical potassium concentrations in the blood range from around 3.6 to 5 millimoles per liter. Blood potassium levels can indicate potassium ...

Low potassium levels can cause symptoms like fatigue and frequent urination. Increasing your intake of potassium-rich foods, like fruits, vegetables, beans, and nuts, may help. Potassium is an ...