Show Sources
Cleveland Clinic: “Anemia,” “Vitamin B12 Deficiency.”
Harvard Medical School: “Ask Dr. Rob About Vitamin B12 Deficiency.”
Johns Hopkins Medical: “Vitamin B12 Deficiency Anemia.”
Content independently created by WebMD and supported by our partners. Learn More
Visit Your Doctor When You Notice These Symptoms
Medically Reviewed by Brunilda Nazario, MD on January 23, 2023
