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DESCRIPTION: Based on two biomarkers of functional vitamin B12 (cobalamin) status, B12 recommendations formulated more than a half century ago may need to be updated. Have a question about this video? Leave it in the comment section at and I’ll try to answer it! This is the first of a five-part video series on B12, similar to the series I did on vitamin D ( where I delve into the derivation of my recommendations, found here for B12 ( and here in general ( To put vitamin B12 in context, please check out Vegan B12 Deficiency: Putting It into Perspective ( Tomorrow I’ll identify the safest sources of B12. If you can’t wait until tomorrow for your NutritionFacts.org ( video-of-the-day fix, please feel free to check out videos on 1000+ other topics (
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