b12 injections called Sandoz Vitamin Injectable Solution - 1000 mcg/10 mL Vitamin B12 Shots NAD+ Injections-
Description
& Mullin, G

This leads to a lower red blood cell count and iron deficiency
For adults, its usually 2.4 micrograms (mcg)

Information for Patients Inform patients that use of local anesthetics may cause methemoglobinemia, a serious condition that must be treated promptly
German vegan study: diet, life-style factors, and cardiovascular risk profile

StatPearls (US source) states, Patients generally receive lifelong intramuscular (IM) injections of vitamin B12 (typically 1000 g per month)
