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Vitamin B12 is a cobalt-containing, water-soluble, essential vitamin and can be absorbed into the dogs body only through food or supplements

PMC Franklin CC, et al

Research labs need this level of purity to minimize variables that can affect the results

Huang PH, Xirasagar S, Chen JH, Cheng YF, Kuo NW, Lin HC

Serine 408 phosphorylation is a molecular switch that regulates structure and function of the occludin -helical bundle
