A potassium blood test measures the potassium level in your blood to check your general health and diagnose conditions.

Potassium is a key nutrient that you can get from eating foods that have it, such as bananas, oranges, and broccoli. This nutrient is also called an "electrolyte" -- a mineral that helps your muscles ...

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 ...