PHOSPHORUS, SERUM

What this test checks

Phosphorus pairs with calcium for bone strength and is essential for energy production. Levels can be abnormal in kidney disease, parathyroid disease, and certain bone conditions.

Why do people get this test?

Often paired with calcium tests when investigating bone, kidney, or parathyroid problems.

When you should consider this test

• Bone pain or weakness
• Kidney disease follow-up
• Suspected parathyroid disorder

How to prepare

Fasting preferred.