[1] [2] However, longstanding neurological complications, such as peripheral neuropathy or cognitive changes, may require three to six months of consistent treatment before significant improvement occurs, and some damage may be irreversible if treatment is delayed
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How to Administer Vitamin B12 Injections Vitamin B12 injections are usually administered intramuscularly, meaning the injection is given directly into a muscle
B12 injections allow for easy absorption, a rapid increase of B12 levels within the bloodstream, and restoration of B12 levels within cells
The limited human data available has not shown significant safety concerns, but long-term human safety data is still being established