Are you getting enough vitamin B12 to stay healthy?
Vitamin B12 is essential for red blood cell production, healthy nerve tissue and brain function. Vitamin B12 deficiency leads to megaloblastic anemia. It is most often caused by malabsorption from food, pernicious anemia (an autoimmune disease that affects gastric mucosa), postsurgical malabsorption, and dietary deficiency. However, for many deficient individuals the cause is unknown.
Early diagnosis and treatment of vitamin B12 deficiency is important to avoid irreversible damage associated with neurological symptoms of vitamin B12 deficiency.
Why consider this test?
- During pregnancy and while breastfeeding due to increased demands
- After gastrointestinal surgery which can affect vitamin B12 absorption
- If you suffer from a digestive disorder (e.g. Crohn’s or Celiac disease) which inhibits normal vitamin absorption
- If you suffer from pernicious anemia, an autoimmune disorder that affects vitamin B12 absorption
- Older adults due to atrophic gastritis
- If you follow a vegetarian or vegan diet which may be deficient in vitamin B12
Symptoms of vitamin B12 deficiency
Symptoms of vitamin B12 deficiency
What’s included in the Vitamin B12 Test?
Vitamin B12 is a water-soluble vitamin that is required for red blood cell formation, neurological function, and DNA synthesis. Vitamin B12 is bound to protein in food and must be released from the protein by hydrochloric acid and gastric protease in the stomach. Synthetic vitamin B12 in fortified foods and supplements is already in a free form.
Many animal products contain vitamin B12, including fish, meat, poultry, eggs, milk, and milk products, but it is generally not present in plant foods. Fortified food products include breakfast cereals and nutritional yeast. Dietary supplements containing vitamin B12 are also available, usually containing the cyanocobalamin form.
How It Works
Step 1. Order your test.
Choose the test that matches your need from our large array of tests. The kit will be delivered to your doorstep. There is no need to leave the comfort of your home.
Step 2. Collect your sample.
Collect your sample using the included instructions. Return your sample using the prepaid, pre-addressed packaging provided.
Step 3. Access your results online
Your sample will be tested as soon as it arrives at our lab. Access your results securely online via TherizonConnect.
Use TherizonConnect to view your test results quickly and easily
The results are only available through TherizonConnect, a free, secure patient portal that you can access on your smartphone, tablet, or desktop. You can also share your results with your doctor, family, or friends.
Vitamin B12 FAQ
Here are the answers to the most frequently asked questions about this test. Please feel free to contact us if you have any other questions.
How much vitamin B12 do I need?
Vitamin B12 requirements vary depending on age and pregnancy/breastfeeding status. Infants require 0.4 mcg/day (0-6 months) and 0.5 mcg/day (7-12 months). The recommended dietary allowance for children is 0.9 mcg/day (1-3 years), 1.2 mcg/day (4-8 years), and 1.8 mcg/day (9-13 years). Adults require 2.4 mcg/day, except for 2.6 mcg/day during pregnancy and 2.8 mcg/day while breastfeeding.
What vitamin B12 level is considered as vitamin B12 deficiency?
Serum vitamin B12 levels below approximately 170-250 pg/mL indicate deficiency in adults. Vitamin B12 deficiency is most often caused by malabsorption from food, pernicious anemia (an autoimmune disease that affects gastric mucosa), postsurgical malabsorption, and dietary deficiency. However, for many deficient individuals the cause is unknown.
Are there medical professionals involved in the process?
All of our tests are developed with advice and input from medical professionals.
How does the Vitamin B12 Test work?
Self-collect your sample following the detailed instructions included in the kit. Place your sample in the specimen bag provided and mail it back to the lab using the prepaid envelope inside the kit.
Our lab uses the verified and approved Alinity i B12 chemiluminescent microparticle immunoassay (CMIA) to accurately measure serum vitamin B12 levels in the sample provided. Your results are available through our online portal as soon as testing is complete.