Potassium
What It Is
Potassium is an electrolyte essential for nerve signals, muscle contractions, and maintaining heart rhythm.
Why It Matters
Both high and low potassium levels can be dangerous, particularly for the heart.
If Levels Are High
High potassium can cause dangerous heart rhythm disturbances and may indicate kidney disease.
If Levels Are Low
Low potassium can cause muscle weakness, cramps, and heart rhythm abnormalities.
Preparation
No special preparation required. Avoid clenching the fist during blood draw.
How Often to Test
Annually, or more often if on medications affecting potassium.
Panels Including This Marker
Important Disclaimer
This information is for educational purposes only and does not constitute medical advice or diagnosis. Results should be interpreted in clinical context by a qualified healthcare professional. If you have severe symptoms or urgent concerns, seek urgent medical help.