DiscoverNutritionFacts.org Video PodcastThe Best Way to Test for Vitamin B12 Deficiency
The Best Way to Test for Vitamin B12 Deficiency

The Best Way to Test for Vitamin B12 Deficiency

Update: 2025-11-17
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A diagnosis of B12 deficiency should not be dismissed based solely on a single measurement of B12 levels in the blood.
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The Best Way to Test for Vitamin B12 Deficiency

The Best Way to Test for Vitamin B12 Deficiency

Michael Greger, M.D. FACLM