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CDC summarizes USP guidance: date an opened multi-dose vial at first puncture and discard it within 28 days unless the manufacturer states another opened-vial date. The dose count and 28-day window together require three vials for the 12-week protocol
Multiple Package Sizes: Available in 5ml, 10ml, 50ml, and 100ml bottle sizes for various needs
It can interfere with many other tests, as well
While all four types of vitamin B12 ultimately serve to prevent deficiency, their bioavailability and absorption rates vary significantly: Synthetic vs
Studies show that increasing B12 doses can help with neuropathyas seen in research
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