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Vitamin B12


By undergoing a Vitamin B 12 test, you can know if there are abnormal vitamin B-12 levels causing health problems.

What is Vitamin B 12?

A vitamin B 12 test detects its required level in the blood to measure the body’s total vitamin B 12 stores.

The primary health concern linked with lower B 12 level is a condition called pernicious anemia. Deficiency of vitamin B12 can also affect the nervous system.

The test is performed if you have an abnormal Complete Blood Count with a blood smear presenting sizeable red blood cells or abnormal (hypersegmented) neutrophils.

Why is Vitamin B 12 Suggested?

A Vitamin B 12 test can be suggested if a person is experiencing the following symptoms:

  • Racing heart
  • Difficulties with balance
  • Dementia
  • Loss of appetite

How is Vitamin B 12 Performed?

The test process for Vitamin B 12 is as follows

  • A plastic band wrapped on your upper arm for filling the vein with blood.
  • Cleaning of the area with an antiseptic.
  • Blood is drawn in a tube with a needle.
  • A bandage applied to the spot which stops the bleeding.

What are the Vitamin B 12 Parameters?

Levels of Vitamin B 12 are low when they are under 200 ng/mL and abnormally high if more than 900 ng/mL.

Preparation Before Performing Vitamin B 12

The preparation for Vitamin B 12 test includes:

  • Inform the doctor about medications and underlying medical condition.
  • Do not eat or drink for 6 – 8 hrs. before the test.

Post-care After Vitamin B 12

Vitamin B 12 test is an easy lab test so, no specific post care needed after the process.

Sample Types in Vitamin B 12

A blood sample is collected in a Vitamin B 12 test.

Risks of Vitamin B 12

No particular risks associated with Vitamin B 12. You may undergo:

  • Redness
  • Mild pain at the area.

Other Specialities

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