Test Detail
Understanding the Test
Test Measures
Interpreting Results
FAQ's
City Price Info
Home Collection
References
Other Tests
Content created by
Reviewed by
Dr. Ashish Ranjan
MBBS, MD (Pharmacology)
Want to know more?
Read our Editorial Policy

Serum Calcium

Also known as Calcium blood test, S. Calcium, Serum Ca
219
You need to provide
Blood
This test is for
Male, Female
Test Preparation
  1. Overnight fasting is preferred but not mandatory.

Understanding Serum Calcium


What is Serum Calcium?

The Serum Calcium test, also known as a calcium blood test, measures the calcium level in the blood. Serum calcium levels are vital for various bodily functions, including maintaining strong bones and teeth, regulating muscle contractions (including the heart), transmitting nerve signals, and ensuring effective blood clotting. It is often done as part of routine health checkups.

Calcium is one of the important and abundant minerals in our body. It is essential for various bodily functions, such as nerve transmission, cell signaling, and muscle contraction. The body also needs calcium to keep the bones healthy and strong, for blood clotting, and to regulate heart rhythms.

The Serum Calcium test is performed if you experience weakness, fatigue, excessive urination and thirst, nausea, stomach pain, constipation, irregular heartbeat, brittle nails, weak and brittle bones, muscle cramps, irritability, or confusion. Furthermore, a calcium blood test aids in the diagnosis of conditions related to calcium metabolism, parathyroid disorders, kidney diseases, and bone health. 

Regular calcium testing may also help monitor the treatment response for abnormal calcium levels, especially in critically ill patients like those suffering from cancer or kidney disorders. It is particularly crucial for individuals with chronic conditions to ensure optimal health.

Low calcium levels, known as hypocalcemia, can be linked to causes such as hypoparathyroidism, kidney diseases, malabsorption disorders, or vitamin D deficiency. On the other hand, high calcium levels, termed hypercalcemia, can be associated with symptoms signaling hyperparathyroidism, certain cancers, kidney dysfunction, or excessive calcium supplementation.

Usually, overnight fasting (8-12 hours) is preferred for this test. Do not eat or drink anything except water before the test. Test result ranges are approximate and may differ slightly between labs depending on the methodology and laboratory guidelines. Talk to your doctor about your specific test results. These will help the doctor determine appropriate treatments, whether through calcium supplements, medications, dietary adjustments, or lifestyle modifications.

What is Serum Calcium used for?

The Serum Calcium test is done:

  • As part of routine health checkups.
  • If you have symptoms of abnormal calcium levels, such as excessive urination and thirst, constipation, irregular heartbeat, brittle nails, weak and brittle bones, muscle cramps, irritability, or confusion.
  • To diagnose diseases that may cause calcium abnormalities, such as thyroid and parathyroid disorders, heart diseases, kidney diseases, bone disorders, and dental diseases and disorders that affect how your intestines absorb nutrients like calcium.
  • To assess the effectiveness of treatments like calcium and vitamin D supplements in the body.
  • To monitor treatment progress in conditions associated with the kidneys, heart, bones, thyroid, teeth, and certain types of cancers that may affect calcium levels in the body.
  • To monitor calcium levels in people during and after blood transfusions or intravenous fluids, those undergoing major surgery, and those with blood protein abnormalities like low albumin.

What does Serum Calcium measure?

The Serum Calcium test measures the levels of calcium in the body. Calcium is the most abundant mineral in the body; most of it is present in the bones and teeth, and the remaining portion (around 1%) is found in the blood. It is usually present in two forms in blood in about equal amounts: "bound calcium," which is attached to proteins in the blood, and "free calcium or ionized calcium," which is not attached to any protein. 

The Serum Calcium test cannot be used to check for lack of calcium in your diet or osteoporosis (loss of calcium from bones) as the body can have normal calcium levels even in dietary calcium deficiency. Moreover, the body can normalize mild calcium deficiency by releasing the calcium stored in bones.

Interpreting Serum Calcium results


Interpretations

Normal range: 8.5 to 10.5 mg/dL (2.2 to 2.7 mmol/L approx.)

Hypocalcemia: Below 8.5 mg/dL (Below 2.2 mmol/L approx.)

Hypercalcemia: Above 10.5 mg/dL (Above 2.7 mmol/L approx.)

Calcium concentration in the body is maintained within a narrow normal range between 8.5mg/dL and 10.5mg/dL.

Hypocalcemia or low blood calcium is indicated if calcium concentration lies below the normal range.

Hypercalcemia or high blood calcium is indicated if calcium concentration lies above the normal range.

Answers to Patient Concerns & Frequently Asked Questions (FAQs) about Serum Calcium


Frequently Asked Questions about Serum Calcium

Q. Are there any risks associated with the Serum Calcium test?

There is usually no risk associated with this test. However, some people may feel a slight sting while the needle is pricked and may experience some bleeding that is normal and usually not bothersome. Some people may experience slight swelling or bruising at the site of the needle prick. Applying ice 3-4 times daily for about a week may help reduce swelling and bruising. If it does not get better, consult your doctor.

Q. What are the signs that indicate you are not getting enough calcium in the body?

Brittle nails, tooth troubles, sleep problems, numbness and tingling in hands and feet, and muscle cramps are some of the signs that you are not getting enough calcium.

Q. Should I take calcium supplements if my test results show low calcium levels?

Always consult your doctor before taking calcium supplements. However, a healthy diet including milk, cheese, yogurt, green leafy vegetables, and almonds can support your daily calcium needs.

Q. What is hypocalcemia and its associated symptoms?

Hypocalcemia is a condition where the blood calcium levels are below the normal range. Symptoms associated with hypocalcemia include weak and brittle hairs, brittle nails, thin and brittle bones that fracture easily, numbness and tingling sensation, muscle spasms and cramps, confusion, memory loss, hallucinations, and seizures.

Q. What is hypercalcemia and its associated symptoms?

Hypercalcemia is a condition where blood calcium levels are higher than the normal range. The symptoms associated with hypercalcemia include headache, weakness, fatigue, excessive urination and thirst, nausea, stomach pain, constipation, irregular heartbeat, weak and brittle bones, muscle cramps, irritability, confusion, and coma, which can be potentially fatal.

Q. What is osteoporosis, and how is it related to calcium deficiency?

Bones are the primary reservoirs of calcium in our body. The body needs a constant level of calcium for the functioning of various parts, such as the heart, muscles, and nerves. When these body parts need calcium, they take it from the calcium stored in the bones. Over time, when the body depletes calcium stores in the bones, it leads to osteoporosis, characterized by fragile bones and an increased risk of falling.

Q. What other tests can be performed if my test results are abnormal?

Other tests that may be performed if your test results are abnormal include an ionized calcium test, urine calcium test, vitamin D test, electrolyte panel test, kidney function test, parathyroid hormone (PTH) test, PTH-related peptide test (PTHrH), and electrocardiography (ECG).

Q. What is the difference between the Serum Calcium test and a Calcium Score test?

The Serum Calcium test is a blood test that analyzes the amount of calcium in your blood, whereas a Calcium Score test is a CT scan that checks how much calcium is in your coronary arteries since this score can indicate if there is plaque accumulation in your arteries, which can narrow or block them.

Q. When can false results appear in the Serum Calcium test?

False results may appear in newborns, showing hypocalcemia. This is usually due to the immature parathyroid gland. False results may also appear after a large volume of blood transfusion. Additionally, some medications can elevate or lower blood calcium levels.
+ more

Serum Calcium test price for other cities


Price inBangaloreRs. 219
Price inNew DelhiRs. 219
Price inMumbaiRs. 219
Price inKolkataRs. 219
Price inHyderabadRs. 219
+ more

Book a Serum Calcium test at home near me

Easy online booking
Search for tests and packages, book a time and select address for seamless at-home lab tests.
Live tracking of phlebotomist
Stay informed with live tracking of our phlebotomist's location for seamless sample collection.
Safe collection
Our phlebotomists follow strict safety protocols to collect samples at home on time.
Sample received at lab
Your sample is bought to our laboratory for testing by our qualified experts.
Quick reports, free follow up
Reports are sent to your email. A free doctor follow up is provided to understand the report better.
Test conducted by
Tata 1mg Labs (Tata 1mg Technologies Private Limited )
CAP accredited, ISO certified
Know more

INDIA’S LARGEST HEALTHCARE PLATFORM

260m+
Visitors
31m+
Orders Delivered
1800+
Cities
Get the link to download App
Reliable

All products displayed on Tata 1mg are procured from verified and licensed pharmacies. All labs listed on the platform are accredited

Secure

Tata 1mg uses Secure Sockets Layer (SSL) 128-bit encryption and is Payment Card Industry Data Security Standard (PCI DSS) compliant

Affordable

Find affordable medicine substitutes, save up to 50% on health products, up to 80% off on lab tests and free doctor consultations.

Know more about Tata 1mgdownArrow

Access medical and health information

Tata 1mg provides you with medical information which is curated, written and verified by experts, accurate and trustworthy. Our experts create high-quality content about medicines, diseases, lab investigations, Over-The-Counter (OTC) health products, Ayurvedic herbs/ingredients, and alternative remedies.

Order medicines online

Get free medicine home delivery in over 1800 cities across India. You can also order Ayurvedic, Homeopathic and other Over-The-Counter (OTC) health products. Your safety is our top priority. All products displayed on Tata 1mg are procured from verified and licensed pharmacies.

Book lab tests

Book any lab tests and preventive health packages from certified labs and get tested from the comfort of your home. Enjoy free home sample collection, view reports online and consult a doctor online for free.

Consult a doctor online

Got a health query? Consult doctors online from the comfort of your home for free. Chat privately with our registered medical specialists to connect directly with verified doctors. Your privacy is guaranteed.