when b12 injections don't work Not Working? Your Cofactors Might Be the Problem : r/B12_Deficiency Why Your B12 Shots Are
Description
Athletes and Fitness Enthusiasts : Whether youre training for a marathon or hitting the gym regularly, B12 injections can support your physical performance and recovery

A single injection helps, but for a depleted person the effect may not last long
FAQ Vitamin B12 Injections: Good or Bad
Sympathectomy under anesthesia may be used to manipulate certain nerves to stop excessive sweating

Neither is a reason to avoid B12, just a reason to be aware
