Calcium

About This Test
Calcium is a key mineral for strong bones and teeth, proper nerve signals, and normal heart and muscle function. Most calcium is stored in bone, but the blood level must stay within a narrow range controlled by parathyroid hormone and vitamin D. Abnormal results can point to problems in the parathyroid glands, kidneys, bone health, or vitamin D balance. This test is commonly included in routine check-ups to screen for potential problems early.

Patient Preparation
No fasting needed

Best Time to Test
Anytime

Tests Included
Calcium

Why is it done
Evaluation of tingling, muscle cramps, weakness, or irregular heartbeat; work-up of kidney stones, bone pain, or frequent fractures; screening and monitoring of parathyroid or vitamin D disorders; follow-up of abnormal calcium on prior tests; monitoring medicines or supplements that affect calcium (e.g., diuretics, vitamin D, calcium tablets).