Calcium
Test code: BCM0137
- Sample
- Blood
- Preparation
- Fasting preferred
- Report
- Within 3 Hours
- Processed
- Mon to Sun, by 06:00 PM
About this test
The Calcium test measures the total calcium in your blood. Calcium keeps your bones and teeth strong and is essential for muscles, nerves and the heartbeat. The test helps detect bone, parathyroid, kidney and vitamin D problems.
Preparation & sample
Overnight fasting is preferred. You can drink plain water. Tell us if you take calcium or vitamin D supplements, antacids or water pills (diuretics).
What does this test measure?
It measures total calcium in your blood (mg/dL). About half of this calcium is attached to a protein called albumin, so doctors sometimes calculate a "corrected calcium" if your albumin is low.
When should you get this test?
- Muscle cramps, spasms, or tingling around the mouth, hands or feet (possible low calcium)
- Excessive thirst, frequent urination, constipation, tiredness or confusion (possible high calcium)
- Kidney stones
- Bone pain, low bone density or fractures
- Kidney disease, parathyroid problems or vitamin D deficiency
- While taking calcium or vitamin D supplements
Understanding your results
- Low calcium can be caused by vitamin D deficiency, low albumin, kidney disease, low magnesium or underactive parathyroid glands.
- High calcium is most often due to overactive parathyroid glands. It can also be caused by too much vitamin D or calcium, some cancers, or dehydration.
- Because calcium is linked to albumin, your doctor may look at albumin or order an ionized calcium test for a more exact picture.
Your doctor may also check vitamin D, phosphorus and parathyroid hormone (PTH) to find the cause of an abnormal result.
Frequently Asked Questions
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How Home Collection Works
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- 2
We come to you
A trained phlebotomist collects your sample at home.
- 3
Tested at our trusted labs
Your sample is processed at one of our trusted labs.
- 4
Get your Smart Report
Easy-to-read results on WhatsApp and email.
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