Vitamin B12 Deficiency Diagnosis

Patient : Why would I have low b12 but normal rbcs? what is considered very low b12?
Symptoms:  Fatigue, lack of concentration, poor sleep
Doctor :   Thank you for your question. Low vitamin B12 can be due to a type of anemia called pernicious anemia which is the decrea sed absorption of B12 in the terminal ileum of the intestine, or due to decreased dietar intake of B12. As a result, there would be a decrease in red blood cell quantity and remaining RBCs would be larger in morphology referred to as megaloblastic. It is possible that you may have a subclinical form of B12 deficiency, which produces symptoms, but not severe enough to show morphological changes in your RBCs. The diagnosis of B12 deficiency is using a combination of your symptoms, B12 levels, and other laboratory findings. The range of B12 can vary depending on one's diet or if there is a history of chronic illness. Thank you for consulting

Related Q&A

Q: Hello Doctor, Good Day! Age: 3o Years, Female (Lab report from: Yenepoya Specialty Hospital, Mangalore) V...

Q: For about 5 days now I have been experiencing an burning sensation in my left ankle. At times I will feel it in both ...

Q: Hi Guys, I have been looking for answers for the last 3 years on this problem- but have failed at every...

Q: For a few months now, I have experience an odd but mild burning sensation in my groin and upper thigh area. I thought...

Q: I just took too much metronidazole by accident. is there anything I can take to dissipate the antibiotic? I just took...


Dr. James Obaji M.D.

  • 247 Reviews
  • Family Physician

Dr. Suneel Sharman M.D.

  • 190 Reviews
  • Family Physician

Dr. Pat Golden M.D.

  • 169 Reviews
  • Cardiologist

Dr. Kunaal Jindal M.D.

  • 112 Reviews
  • Plastic Surgeon