Fast Five Quiz: Vitamin B12 Deficiency Key Aspects

Romesh Khardori, MD, PhD


January 17, 2023

In Western populations, vitamin B12 deficiency occurs in up to 40% of diets because people often consume a low quantity of vitamin B12–rich foods. In extreme cases, this deficiency can produce neurologic and hematologic signs and symptoms. However, low or marginal vitamin B12 levels (200-300 pg/mL [148-221 pmol/L]) in asymptomatic individuals is far more common. Do you know key risk factors for vitamin B12 deficiency as well as clinical manifestations and best practices for management? Test yourself on this common nutritional deficiency with this short quiz.


Comments on Medscape are moderated and should be professional in tone and on topic. You must declare any conflicts of interest related to your comments and responses. Please see our Commenting Guide for further information. We reserve the right to remove posts at our sole discretion.