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Vitamin B12 Test
Vitamin B12 Test
Measure the level of vitamin B12, an essential vitamin that is necessary for making red blood cells, maintaining a healthy nervous system, and creating DNA. Read moreTest details
Sample type:
Blood
Preparation:
You do not need to do anything special to prepare for the sample collection.
This panel does not require fasting.
$49.00
+ $6.00 Physician Service Fee
What
Measures the level of vitamin B12 (also known as cobalamin) in your blood.
Who
Must be 18+ years of age to purchase.
How
Blood
Schedule an appointment, then visit a Quest Diagnostics patient service center location.
About the Test
Vitamin B12 is an essential nutrient and is necessary for producing and maintaining nerve and red blood cells, supporting the nervous system, and helping to create DNA, the basis of all cells. Vitamin B12 must be supplied by the diet or through supplementation because the body is not able to produce it. Vitamin B12 deficiency (low levels of vitamin B12) may be due to limited dietary intake, poor absorption, advanced age, certain medical conditions, or some medications. Low levels of vitamin B12 can lead to anemia, nervous system conditions and a variety of health issues. This test can help determine whether you have a vitamin B12 deficiency.
How Does it Work?
Take an in-person test at a Quest Diagnostics location.
Over 2000+ locations focus on your safety, confidentiality and convenience.
1. Purchase your test
Schedule your appointment after purchasing a test to minimize wait time.
2. Visit a location
Enter your zip code to find a Quest Diagnostics location closest to you.
3. Get results online
We will email you when your confidential results are available.
Take an in-person test at a Quest Diagnostics location.
Over 2000+ locations focus on your safety, confidentiality and convenience.
1. Purchase your test
Schedule your appointment after purchasing a test to minimize wait time.
2. Visit a location
Enter your zip code to find a Quest Diagnostics location closest to you.
3. Get results online
We will email you when your confidential results are available.
What to expect with Quest

Health insights, on your terms
Get lab work without having to wait and pay for an appointment with a doctor. Shop questhealth.com and choose from 75+ tests – the same quality tests that doctors use and trust, but no doctor visit required for purchase.

Easy to buy & simple to schedule
After your purchase, schedule an appointment at a nearby Quest Diagnostics location and have your specimen sample collected by a trained healthcare professional.

Fast online results, with support
Access test results from your phone as soon as they’re available, with the option to discuss your results with an independent physician at no extra cost.
FAQs
Vitamin B12 deficiency anemia is a condition in which your body does not have enough healthy red blood cells, due to insufficient amounts of vitamin B12. This vitamin is needed to make red blood cells (RBCs), which carry oxygen to all parts of your body. Your body cannot function normally without an adequate supply of oxygen-rich RBCs.
Vegetarians and vegans who want to increase their vitamin B12 intake may consider fortified foods such as nutritional yeast, cereal grains, and plant-based milk, or taking a B12 supplement to replenish the body's stores of this essential vitamin.