Vitamin B12
What To Think About
- Reference Folic acid Opens New Window levels can be high in people who lack vitamin B12. A folic acid test is often done at the same time as a vitamin B12 test. For more information, see the topic Reference Folic Acid.
- Methylmalonic acid is a substance in the blood that increases when vitamin B12 levels decrease. A methylmalonic acid (MMA) blood test may be done to help evaluate vitamin B12 test results.
- A change in homocysteine levels may also affect a change in vitamin B12 levels because of Reference metabolism Opens New Window changes. For more information, see the topic Reference Homocysteine.
| By: | Reference Healthwise Staff | Last Revised: Reference December 14, 2010 |
| Medical Review: | Reference E. Gregory Thompson, MD - Internal Medicine
Reference Brian Leber, MDCM, FRCPC - Hematology |
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