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For many, these signs might lead them to their GP, seeking answers and perhaps, a solution like a vitamin B12 injection
The human liver stores enough vitamin B12 in the body to last for up to two years in most cases
Community sources commonly describe cycles of 4-8 weeks on, 2-4 weeks off, citing the desire to assess off-cycle effects and the absence of long-term safety data as the rationale
Typically, B12 can be administered either intramuscularly or subcutaneously
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