how often are vitamin b12 injections administered Shots in Friso, Sherman, Anna. and Sunnyvale, TX B12 Injection Dosage and Frequency:
Description
In a rat model of hyperhomocysteinemia induced by a folate-free diet, glomerular sclerosis, mesangial expansion, podocyte dysfunction and fibrosis occurred due to enhanced local oxidative stress

And like you say, the B12 might not be the cause

B12-related acne typically develops within one to four weeks of initiating supplementation or receiving injections

How do I know if I have a vitamin B12 deficiency
