Electrolytes
Sodium, potassium, chloride, calcium, phosphorus and magnesium.
Sodium
A mineral that regulates body water and blood pressure. Preparation: no fasting.
Potassium
A mineral essential for heart rhythm and muscle function. Preparation: no fasting.
Chloride
Helps keep fluid balance and blood acidity in check. Preparation: no fasting.
Calcium
A mineral for bones, nerves and muscles. Preparation: preferably 8 hours of fasting.
Phosphorus
Works with calcium in the bones; checked in kidney or bone problems. Preparation: preferably 8 hours of fasting.
Magnesium
A mineral important for muscles, nerves and heart rhythm. Preparation: preferably 8 hours of fasting.
Before your test
Fasting means no food or sugary drinks; plain water is fine. Bring an ID and, if you have one, your doctor’s order. Tell us what medications you take. Don’t see your test? Call us and we’ll tell you if we offer it and how to prepare.