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Therefore, B12 from food or oral supplements will be poorly absorbed if: There is low stomach acid due to use of a Proton Pump Inhibitor (PPI) There is low intrinsic factor
Frequency of injections: Consistent, scheduled injections produce more noticeable and lasting results
In rare cases, allergic reactions like difficulty breathing, swelling of the face or throat, or a fast heartbeat may occur
The blood level of methylmalonic acid increases when a person has B 12 deficiency
These products are not intended for human or animal consumption, medical, diagnostic, therapeutic, or any non-research use
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