A potassium blood test measures the potassium level in your blood to check your general health and diagnose conditions.

The anion gap blood test measures the acid-base and electrolyte balance in the blood. Results can show whether there is an imbalance in a person’s pH levels, which may be making the blood too acidic ...

Magnesium, potassium, or sodium? Learn what each electrolyte does, signs of low levels, and when a supplement may help.