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One study found that high doses of oral B12 (1,000 mcg daily) could provide adequate absorption even in the presence of intrinsic factor deficiency
In vitamin B 12 deficiency, methionine block implies that SAM (driven by Met) is lowered as well and hence it is plausible CBS is less effective
References: National Research Council (US) Committee on Diet and Health
It is often used for medical purposes to stimulate the production of growth hormones in the body
However, vitamins influence gene expression, enzyme activity and neurotransmitter pathways
Ahmad S, Azid NA, Boer JC, Lim J, Chen X, Plebanski M, et al
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