Vitamin B12 Deficiency Test: The 4 Labs I Actually Order
By Kulmeet Kundlas, MD — Board-Certified Internal Medicine A vitamin B12 deficiency test is one of the most misunderstood parts of a routine workup, and getting it right can change everything. Most patients who walk into my office worried about low energy expect one blood test to answer the question: is my vitamin B12 low? I wish […]
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