Test guide
Potassium Blood Test
A potassium blood test measures the amount of potassium in your blood. Potassium is a type of electrolyte . Electrolytes are electrically charged minerals that help control the amount of fluids and the balance of acids and bases (pH balance) in your body. They also help control muscle and nerve activity and perform other important functions.
What it is for
A potassium blood test measures the amount of potassium in your blood. The test is often part of a group of routine blood tests called an electrolyte panel . It may be used to monitor or diagnose conditions related to abnormal potassium levels. These conditions include kidney disease , high blood pressure , and heart disease . Source: MedlinePlus, National Library of Medicine. Medical test information is public domain. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Limitations
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
Also known as
- potassium serum, serum potassium, serum electrolytes, K
Reviewed products
Curated product links for this test are still under editorial review. Meanwhile, browse the product directory or request a supplier match below.