An essential electrolyte that helps your nerves, muscles, and heart work as they should.
Potassium is an electrolyte found mostly inside your cells. It is essential for steady heart rhythm, healthy nerve signals, and muscle contraction, including the heartbeat itself.
Your kidneys keep blood potassium within a tight range. Even small shifts up or down can affect how your heart and muscles work, which is why potassium is one of the most carefully watched blood values.
A potassium test helps spot problems before they cause symptoms. Low potassium (hypokalemia) can come from diuretics, vomiting, diarrhoea, or some hormone conditions, and may cause weakness, cramps and irregular heartbeat.
High potassium (hyperkalemia) is often linked to reduced kidney function or certain blood pressure medications and can be dangerous for the heart. Because potassium has such a narrow safe range, accurate measurement matters.
Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.
Ranges are guidance and vary by laboratory and method.
| Group | Reference range (SI) |
|---|---|
| Adults | 3.5 to 5.1 mmol/L |
Aligned to German laboratory practice (DGKL). Always interpret against your own lab's range.
Potassium leaks out of blood cells if the sample is shaken, chilled, or left too long before processing, which raises the result (pseudohyperkalemia). A tight tourniquet or clenching the fist during the draw can also raise it. Diuretics and some blood pressure medications shift true levels.
Usually read together with sodium, chloride, and kidney markers such as creatinine and eGFR.
What does my potassium result mean? It shows the amount of potassium in your blood. Levels outside the usual range can affect nerves, muscles, and heart rhythm.
Do I need to fast for this test? No. Fasting is not needed for a standard potassium test.
What can affect my potassium level? Medicines (diuretics, ACE inhibitors, ARBs), supplements or salt substitutes, dehydration, vomiting/diarrhea, strenuous exercise, and sample handling can all influence results.
How often should I test potassium? If healthy, it’s usually checked in routine panels. If you use certain medicines or have kidney, heart, or digestive issues, your clinician may monitor it more often.
How long do results take? Results are usually ready in about 7 days.
What should I discuss with my clinician? Share all medicines, supplements, and salt substitutes. Ask whether any changes, a repeat test, or an ECG are recommended.
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