Staying Healthy
Ask the doctor: Why do I need shots for low vitamin B12?
Image: Thinkstock |
Q. My doctor told me my B12 is extremely low, at 106, but he said I didn't have anemia. He prescribed monthly shots and told me he would test my vitamin B12 levels again in two months. If my B12 level is so low, can you please tell me how only two shots can help?
A. The human body needs vitamin B12 to make oxygen-carrying red blood cells and nerves, but it can't manufacture its own supply. Instead, we get it through our diets, primarily through meat, fish, poultry, eggs, and dairy products. People who are vegans or vegetarians may not get enough vitamin B12 in food and their levels may drop. And older people may have trouble absorbing B12 from food.
To continue reading this article, you must log in.
Subscribe to Harvard Health Online for immediate access to health news and information from Harvard Medical School.
- Research health conditions
- Check your symptoms
- Prepare for a doctor's visit or test
- Find the best treatments and procedures for you
- Explore options for better nutrition and exercise
I'd like to receive access to Harvard Health Online for only $4.99 a month.
Sign Me UpAlready a member? Login ».
Disclaimer:
As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review or update on all articles.
No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.