A mineral essential for bones, muscle, and nerve signalling.
Calcium is the most abundant mineral in the body. Most of it is stored in bones and teeth, but a small, tightly controlled amount circulates in the blood, where it is essential for nerve signalling, muscle contraction, blood clotting and heart rhythm.
This test measures total calcium in serum. The value reflects calcium in the extracellular fluid, the compartment outside your cells that includes blood, which is the standard sample used to assess calcium status.
The body keeps blood calcium within a narrow range using parathyroid hormone, vitamin D and the kidneys. Measuring it shows whether that balance is holding.
A high level can point to overactive parathyroid glands, certain cancers or too much vitamin D. A low level can signal low parathyroid activity, vitamin D deficiency or kidney problems, and may cause cramps or tingling.
Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.
| Measure | Adult range (SI) |
|---|---|
| Total calcium, serum | 2.20 to 2.60 mmol/L |
Ranges are guidance and vary by lab. Calcium results are best corrected for albumin. Cite your laboratory's reference interval.
Low albumin lowers total calcium without changing the active free fraction, so albumin correction matters. Prolonged tourniquet application, high vitamin D intake, thiazide diuretics and lithium can shift results. Haemolysis can interfere.
Read with albumin (for corrected calcium), phosphate, parathyroid hormone (PTH) and vitamin D.
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