how long do you have to take b12 injections Injection Frequency: Often Should Get a Shot? How Often Should You Get
Description
And here's the surprising part: it's far more common than most people think

Kopchick, J

Although their purposes are similar, their mechanisms, benefits, and usage differ

Patients report less burning with a subcutaneous administration, which gives it a slight advantage over an intramuscular injection, according to the CDC
