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5:02
YouTube
NutritionFacts.org
The Best Way to Test for Vitamin B12 Deficiency
A diagnosis of B12 deficiency should not be dismissed based solely on a single measurement of B12 levels in the blood. For classic symptoms of B12 deficiency, a therapeutic trial of B12 supplementation should be considered even if laboratory values are normal. This is the second video in a five-part series on vitamin B12. If you missed the ...
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