b12 injection last How Long Does a Shot In Your Body? B12 Shots for Weight Loss:
Description
The injector makes a V-shape with their thumb and forefinger to create a triangle for the insertion

References Beaudart, C

Medical intake

In Brazil, the overall prevalence of B vitamin deficiencies remains unclear, but a recent study identified a higher prevalence among pregnant and lactating mothers ( 12 , B 1 , and B 6 deficiencies are increasing over time
Guaranteed analysis: each Kg contains: Vitamin B12 (minimum) 110,000 mcg

This means that there is no risk of overdosing when you get a vitamin B12 shot.