Dr. Michael Greger
October 21, 2020

** A highly-informative, 4-minute video. Directly below the video, click button to read "transcript," instead of viewing video.

Before getting into the nitty gritty of how much to take, how frequently, and which type is best, what are the symptoms of B12 deficiency?
What aren’t the symptoms of B12 deficiency? It’s known as “The Great Masquerader.” It can cause everything from abdominal distention and chronic diarrhea to shortness of breath and swollen red painful feet. It can also cause Parkinson’s syndrome-like symptoms, skin darkening that resolved with supplementation, and something I had never heard of before—bilateral useless hand syndrome.

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