House AA, Eliasziw M, Cattran DC, Churchill DN, Oliver MJ, Fine A, Dresser GK, Spence JD
JAMA303p1603-9(2010 Apr 28)
A high level of blood serum homocysteine (known as “homocysteinemia”) is associated with pernicious anemia. Because supplementation of the B vitamins lower levels of homocysteine, one common intervention for altering this risk factor is to supplement patients at risk for cardiovascular disease with folic acid (B9), pyridoxine (B6), and cyanocobalamin (B12). In fact, interventions designed to lower levels of homocysteine with high-dose supplementation of the B vitamins been equivocal, in some cases, seeming to exacerbate disease.
Marino et al. showed that eradication of Helicobacter pylori associated with gastritis reduced abnormally high levels of homocysteine.3)
Given the fact that the B vitamins probably interfere with the immune response to microbes, MP patients should avoid taking supplemental doses of vitamin B12.
Sample PubMed cite4)
— Sallie Q 10.22.2016 removed ref to curemy
Lots of discussion about PA and B12 deficiency here: http://curemyth1.org/view_topic.php?id=2626&forum_id=2
Lots of content here: http://www.curemyth1.org/forum2/2626.html