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This product is intended exclusively for in vitro laboratory research
Therefore, assay for reduced activity of this enzyme, in red blood cell lysates, is highly diagnostic in cases of suspected thiamine deficiency
Pattou F et al
However, for B12, if any part of that complex digestive process is compromised especially the intrinsic factor or the absorption sites in the intestine then a significant portion of the B12 from a tablet might never reach your bloodstream
New England Journal of Medicine, 375(19), 1834-1844
134 , 3213S3214S (2004)
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