how long does it take vitamin b12 injections to work Shots at Home: How, Where & Often Inject Yourself Vitamin B12 Injections vs Supplements:

Beyond 12 Weeks: Limited Evidence Territory No controlled human trial has tested AOD-9604 beyond 12 weeks

Possible B12 injection side effects tend to be mild and short-lived, and may include: Injection site pain, redness, or swelling Mild itching Brief diarrhea (less common) A feeling of warmth after the injection Serious side effects are rare

And they dish it out in cosmetic clinics now

Lipotropic injections usually sold as MIC injections, MIC B12 injections, or simply lipo shots are compounded blends of methionine, inositol, and choline, often combined with vitamin B12

Still, it is worth being aware of the possibilities, especially if you have certain pre-existing conditions