Pernicious Anaemia/B12 Deficiency Support Group - Page - Small Intestinal Bacterial Overgrowth and B12 Deficiency Bacterial Overgrowth Bacterial overgrowth occurs when there is a significant increase in the bacterial population in the
![Brigham and Women's Medicine Residents on Twitter: "Consider the various parts of the GI tract that can be implicated in B12 deficiency & test PRN. While we commonly think of vegan as Brigham and Women's Medicine Residents on Twitter: "Consider the various parts of the GI tract that can be implicated in B12 deficiency & test PRN. While we commonly think of vegan as](https://pbs.twimg.com/media/EiH1PjWVgAE8aB6.jpg)
Brigham and Women's Medicine Residents on Twitter: "Consider the various parts of the GI tract that can be implicated in B12 deficiency & test PRN. While we commonly think of vegan as
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