b12 injection safe in pregnancy are injections during The Advantages of B12 Injections Versus Oral Supplements: Shawn Veiseh Vitamin B12 Injection Sites: All
Description
No, this isnt necessary as you cannot overdose on vitamin b12, the body will store what it needs and get rid of the rest

Not sure if B12 injections are right for you
Researchers at Monash University, Australia, identified the C-terminal fragment as the region responsible for the Lipolytic properties of the intact hGH molecule

B12 injections are quick and easy to receive, typically injected into the thick muscle of the upper arm