Office of Dietary Supplements • National Institutes of Health
Table of Contents
IntroductionRecommended IntakesSources of Vitamin B12Vitamin B12 Intakes and StatusVitamin B12 DeficiencyGroups at Risk of Vitamin B12 DeficiencyVitamin B12 and HealthHealth Risks from Excessive Vitamin B12Interactions with MedicationsVitamin B12 and Healthful Diets References