do vitamin b12 injections work Best Injection Sites B12 shots for weight loss:

I read a report of an assessment of medicines and expiry dates a couple of years ago

[4] In differentiated 3T3-L1 mouse adipocytes, 5-Amino-1MQ lowered intracellular 1-MNA in a concentration-dependent manner with an EC 50 of 2.3 1.1 M (R = 0.94)

Cyanocobalamin Injection, USP is a sterile solution of cyanocobalamin (vitamin B) intended for intramuscular (IM) or subcutaneous (SC) injection

They work by alleviating nerve pain and reducing associated inflammation and discomfort

Thats not me denying it definitely doesnt cause an issue in some people, but right now we dont have evidence to support a mechanism in which it would happen