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Everything else was alright
Tang, Z
PMC 6793970
So injecting beyond a certain point may cause your cells to fight off the excess B12 so hard that it might reduce the amount of active cellular B12 - probably not to dangerous levels, but possibly sufficient to trigger some symptoms
Regular consumption of these foods or supplements is essential, especially for vegetarians and vegans, to maintain adequate B12 levels and support energy, red blood cell production, and nerve function
The root cause of a vitamin B12 deficiency can be one of several things
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