Calcium is a mineral that keeps bones and teeth strong and also helps muscles, nerves and the heart work properly. The body keeps blood calcium in a narrow range with the help of vitamin D, parathyroid hormone and the kidneys. A calcium blood test shows if this balance is off. People get it checked for bone pain, muscle cramps, tingling, kidney stones, kidney disease, thyroid or parathyroid problems, or during a routine checkup. Because most calcium in blood is carried by a protein called albumin, doctors often read it together with albumin.
हिंदी में पढ़ें| Level | Value (mg/dL) |
|---|---|
| Total calcium (adults)Labs vary slightly | About 8.5 – 10.5 mg/dL |
| Ionised (free) calciumNot done by all labs | About 4.6 – 5.3 mg/dL |
| Children and teenagersChild specialist interprets | Often slightly higher |
| Low albuminDoctor may calculate corrected calcium | Total calcium may read low |
Ranges differ a little from lab to lab.
This is slightly low. It may be due to low albumin, low vitamin D or other causes; your doctor will look at albumin and may repeat the test.
This is mildly high. Causes can include an overactive parathyroid gland or too many supplements, so please show the report to your doctor.
This is clearly high and should be shown to a doctor soon, especially if you feel very thirsty, confused or have vomiting or constipation.
The test usually measures total calcium in the blood in mg/dL. Some labs also measure ionised (free) calcium, the active part. It is advised for people with bone problems, muscle cramps, tingling, kidney stones, kidney disease, low vitamin D, parathyroid problems or those taking calcium and vitamin D supplements. How often to check it depends on your condition and what your doctor advises.
Usually no special preparation is needed, though some labs prefer a fasting morning sample. Tell your doctor about any calcium, vitamin D or other supplements and medicines you take, but do not stop them without asking.
See a doctor if your calcium is outside the range printed on your report. Get urgent medical help if low calcium comes with muscle spasms, cramps in hands and feet, or tingling around the mouth, or if high calcium comes with confusion, severe weakness, repeated vomiting or a fast or irregular heartbeat. A fit (seizure) is an emergency – go to a hospital immediately.
For adults, total calcium is usually about 8.5–10.5 mg/dL and ionised calcium about 4.6–5.3 mg/dL. The range printed on your own report is the one that applies, and your doctor reads it with albumin and other results.
Not exactly. The body keeps blood calcium steady by taking it from bones when needed, so blood calcium can be normal even when bones are weak. Bone strength is checked by other tests that your doctor may advise.
Much of the calcium in blood is attached to albumin. If albumin is low, total calcium may look low even when the active calcium is fine. Doctors may use a corrected calcium value to adjust for this.
Yes. A trained person collects the blood sample at your home. It is tested at a partner lab, and the report is sent to you on WhatsApp and email.
This page is general information, not medical advice. The normal range printed on your own report is the one that applies, and only a doctor can tell what your result means for you.
5 tests covering RENAL, THYROID, VITAMINS. No fasting needed.
5 tests covering RENAL. No fasting needed.
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