Dear Dr. Roach: I have had pernicious anemia for about eight years and must have an injection of vitamin B-12 every three weeks to stay alive. I am also a diabetic for over 10 years, with my A1C ...

IN 1959, Li et al 1 reported a case of pernicious anemia due to the presence of an in vivo intrinsic factor inhibitor, diagnosed in childhood, with a twenty-five-year follow-up. Since then, "defective ...

Vitamin B12 is needed to produce an adequate amount of healthy red blood cells in the bone marrow. Vitamin B12 is available only in animal foods (meat and dairy products) or yeast extracts (such as ...