The headache of gathering all these materials is admittedly a drawback for some researchers, as there are not many quality vendors that carry them
If it has been longer, skip it and resume the regular weekly day
[1] Other causes include autoimmune conditions, certain infections, and inflammatory states that alter B12 metabolism or binding protein production
Gastrointestinal surgery can also affect B12 absorption
Resultantly, bacteriostatic water will not remain homogeneous, as an uneven concentration of bacteriostatic preservative will be present throughout the vial
Non-clinical only: Not intended for diagnostic, therapeutic, or clinical use