Electrolytes and fluid balance
What is Potassium?
critical for heart and muscle
- Unit
- mmol/L
- Sample
- Serum
- Fasting
- No fasting needed
- Turnaround
- 1 day
Potassium is critical for heart rhythm, muscle function, and nerve conduction. Both high and low values can cause serious symptoms.
Potassium is affected by kidney function, certain medications (diuretics, ACE inhibitors), and hormonal disorders.
What does low Potassium mean?
Low potassium often appears with vomiting, diarrhoea, diuretic use, or adrenal disorders.
What does high Potassium mean?
High potassium appears with kidney failure, certain medications, and sample haemolysis.
Panels that measure Potassium
- Health Check Base
- Kidney Test
- Health Check Plus
- Health Check Complete
- Health Check Man
- Health Check Kvinna
More markers in the same area
Launching in Stockholm in 2026.
Want to know when you can order?
This is general information about the marker, not an assessment of your values and not medical advice. Last updated: August 2026.