This topic will help you understand the Vitamin B12 test and how to prepare for it.

What Is the Vitamin B12 Test Procedure?

Vitamin B12 is an essential vitamin for producing red blood cells and repairing cells, and tissues. It is also crucial for nerve health. The Vitamin B12 test is an analysis used to determine the level of the vitamin in the blood.

When Is the Vitamin B12 Test Conducted?

The Vitamin B12 test is not routinely requested, but your doctor may order this test if:

You suffer from anemia (a deficiency of red blood cells), or have an abnormal blood test result.

You experience symptoms of neuropathy (tingling or numbness in your hands and feet).

It is needed to help assess your nutritional status if you begin to show symptoms of anemia, especially if you are vegetarian.

It is required to help diagnose the cause of changes in your mental state or behavior.

How Do You Prepare for the Vitamin B12 Test?

You may need to fast for 8 hours before giving the blood sample. While the test itself does not require fasting, there might be other tests required from the blood sample that do need fasting.