Electrolytes

... Why get tested?
To detect a problem with the body''s fluid and electrolyte balance

When to get tested?
As part of routine health screening, when your doctor suspects that you have an excess or deficit of one of the electrolytes (usually sodium or potassium), or if your doctor suspects an acid-base imbalance

Sample required?
A blood sample drawn from a vein in the arm
...

An electrolyte is a substance containing free ions which behaves as an elect ...