doi: 10.1136/pn-2022-003631
The strongest evidence is in animal research
All formulations are prescribed after medical evaluation and administered intramuscularly or dispensed through a licensed pharmacy
Low levels could be caused by pernicious anemia, not consuming enough vitamins through your diet, or as a side effect of some medications
These injections deliver concentrated doses of essential vitamins directly into your bloodstream, offering several benefits to enhance your immune response
Anyway, the fact is that some people manage perfectly well on a 1mg injection every three months but others, and the vast majority of the PA Society do not, and they feel a return of their symptoms, or their family and friends notice a return of their symptoms long before their next injection is due