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Vitamin B12 injections are fast-acting because they bypass the digestive system and deliver the nutrient straight into the bloodstream
People who have difficulty processing vitamin B12 may develop anemia
Injection Therapy Outcomes Research indicates B12 injections rapidly restore serum levels and reverse neurological symptoms in most patients
Results can vary, but many individuals notice positive effects within the first 2448 hours
No official human safety or efficacy data
Throw away any unused medicine after the beyond-use date
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