How to Test for Functional Vitamin B12 Deficiency

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NutritionFacts .org
NutritionFacts .org
20 Sep 2020

Many doctors mistakenly rely on serum B12 levels in the blood to test for vitamin B12 deficiency.

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Now if you do get your homocysteine tested and despite both B12 supplementation and eating beans and greens it’s still too high (meaning double digits), I have a suggestion, as covered in the final two videos in this video series: Should Vegetarians Take Creatine to Normalize Homocysteine? (http://nutritionfacts.org/vide....o/should-vegetarians and The Efficacy and Safety of Creatine for High Homocysteine (http://nutritionfacts.org/vide....o/the-efficacy-and-s

How did we end up here? Watch the full series if you haven’t yet:
• What to Eat for Stroke Prevention (http://nutritionfacts.org/vide....o/what-to-eat-for-st
• What Not to Eat for Stroke Prevention (http://nutritionfacts.org/vide....o/what-not-to-eat-fo
• Do Vegetarians Really Have Higher Stroke Risk? (http://nutritionfacts.org/vide....o/do-vegetarians-rea
• Vegetarians and Stroke Risk Factors—Vitamin D? (http://nutritionfacts.org/vide....o/vegetarians-and-st
• Vegetarians and Stroke Risk Factors—Omega 3s? (http://nutritionfacts.org/vide....o/vegetarians-and-st
• Vegetarians and Stroke Risk Factors—Vegan Junk Food? (http://nutritionfacts.org/vide....o/vegetarians-and-st
• Vegetarians and Stroke Risk Factors—Saturated Fat? (http://nutritionfacts.org/vide....o/vegetarians-and-st
• Vegetarians and Stroke Risk Factors—Animal Protein? (http://nutritionfacts.org/vide....o/vegetarians-and-st
• Vegetarians and Stroke Risk Factors—Vitamin B12 & Homocysteine? (http://nutritionfacts.org/vide....o/vegetarians-and-st
• How to Test for Functional Vitamin B12 Deficiency (http://nutritionfacts.org/vide....o/how-to-test-for-fu

Have a question about this video? Leave it in the comment section at http://nutritionfacts.org/vide....o/how-to-test-for-fu and someone on the NutritionFacts.org team will try to answer it.

Want to get a list of links to all the scientific sources used in this video? Click on Sources Cited at https://nutritionfacts.org/vid....eo/how-to-test-for-f You’ll also find a transcript and acknowledgements for the video, my blog and speaking tour schedule, and an easy way to search (by translated language even) through our videos spanning more than 2,000 health topics.

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Thanks for watching. I hope you’ll join in the evidence-based nutrition revolution!
-Michael Greger, MD FACLM

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