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Source-backed patient guide
A vitamin B12 test measures cobalamin in a blood sample.
These operational details come from the laboratory catalogue. Confirm current availability and preparation with the laboratory before collection.
Patient education
A vitamin B12 test measures cobalamin in a blood sample.
It may be requested with folate or other tests when evaluating certain types of anemia, nerve-related symptoms, or risk of vitamin B deficiency.
Preparation depends on the test and any other tests ordered at the same time. Follow the instructions from the requesting professional and laboratory, tell them about medicines and supplements, and do not stop medicines unless a qualified professional tells you to.
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Need this test? Contact our laboratory team to confirm current availability or referral options.
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