b12 injection how many days to take Often Should You Get Injections? The Timing of B12 Injections:

For multi-dose vials where you draw from the vial over days or weeks, bacteriostatic water is the only safe choice

A Although the substances in the injections may play important roles in fat metabolism, researchers are still unclear whether higher doses are beneficial for weight or fat loss and lipotropic injections may not be effective for weight or fat reduction

Alleviates Symptoms of Anemia By boosting red blood cell production, B12 injections help reduce common symptoms of anemia, including weakness, dizziness, and shortness of breath

It is assists DNA replication and blood formation

With b12 levels your low I wouldn't advise stopping the injections