Aetna Intelihealth
Aetna: Inteli Health: Vitamin B12 Deficiency
Thorough overview of vitamin B12 deficiency. Includes information on symptoms, treatment, prevention, and much more.
National Institutes of Health
Facts About Dietary Supplements: Vitamin B12
This website answers several questions about vitamin B12 such as, "What foods provide vitamin B12?" and "When is a deficiency of vitamin B12 likely to occur?" Here, you will also find information on the health conditions prevented and...
US National Library of Medicine
Medline Plus: Pernicious Anemia
This site contains details of pernicious anemia, alternative names, definition, causes and risks, prevention, symptoms, signs and tests, treatment, and complications. It also includes a picture of pernicious anemic red blood cells.
Mayo Clinic
Mayo Clinic: Vitamin B12
In addition to providing information on the functions and food sources of vitamin B12, this website includes a chart of usage and dosage.
Other
International Health News Database: Vitamin B12
At this website, there are several summaries of medical studies and clinical trials on vitamin B12 and its role in preventing and treating various health conditions. Read about vitamin B12's role in fighting such conditions as...
Healthline Media
Medical News Today: What Is Vitamin B12?
A look at the causes, symptoms, effects, and treatment of Vitamin B deficiency.
US National Library of Medicine
Medline Plus: Vitamin B12
This is a very brief write-up on vitamin B12, which is organized into several sections including, "Function," "Food Sources," and "Recommendations." Though not containing detailed information, this website serves as a good source of...