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International Journal of Biochemistry and Cell Biology , 72, 22-30.

How it Works Vitamin B12, a water-soluble vitamin that is essential for many bodily processes, including the production of red blood cells and the functioning of the nervous system, is delivered directly into the bloodstream

Madry E, Lisowska A, Grebowiec P, et al

The size of the molecules selected may permit understanding of the different routes of transport, with molecules such as inulin, polyethylene glycols (PEGs) and Fluorescein Isothiocyanate-Dextran (FITC-Dextran) being utilised for assessment of the paracellular route, whilst larger molecules such as horseradish peroxidase can be utilised for assessment of the transcellular route [21]

Technical Note : Most research protocols utilize the Iodide Salt form for stability