Why the current Recommended Daily Allowance for vitamin B12 may be insufficient, and what the optimal dosage is. Subscribe to NutritionFacts.org’s free e-newsletter and receive a recipe from Dr. Greger’s brand-new cookbook, The How Not to Diet Cookbook: This is…

Taking too much vitamin B12 can lead to side effects. Knowing the facts before you begin vitamin B12 supplementation can help you to make informed health decisions about the vitamins you choose to take. Consult with your physician before taking…