Calcium (Ca)

Critical for nerve, muscle, bone, and clotting. Interpret with albumin or ionized calcium.

Units

mg/dL

Reference (Male)

8.5 – 10.5 mg/dL

Reference (Female)

8.5 – 10.5 mg/dL

What it measures

Critical for nerve, muscle, bone, and clotting. Interpret with albumin or ionized calcium.

What a high value can mean

Hyperparathyroidism, malignancy, vitamin D toxicity, immobilization.

What a low value can mean

Hypoparathyroidism, vitamin D deficiency, kidney disease, low magnesium.

Conditions it helps assess

Bone health
Parathyroid function

Reading these numbers in context

Reference ranges describe the central 95 % of a healthy reference population — 5 % of perfectly healthy people fall outside any given range by definition. A single mildly abnormal value is rarely meaningful on its own. blood-test.life always interprets values together with related biomarkers before flagging.

Related biomarkers in Electrolytes

Sodium Na Primary extracellular cation. Dysregulation affects neurologic function. Potassium K Primary intracellular cation. Tight regulation is critical for cardiac rhythm. Magnesium Mg Cofactor in 300+ enzymatic reactions. Commonly under-tested despite frequent subclinical deficiency.