how to give subcutaneous b12 injections Shots at Home: How, Where & Often Inject Yourself Injecting B12 into fat: 4

This bypasses the digestive system entirely, which matters for anyone with absorption issues

Are there any side effects

Note: long-term use of drugs that affect stomach acid production such as H2 blockers and proton pump inhibitors can worsen B12 deficiency

Ill include a pic, some things to note after reading the injection pain sticky and some other stuff: I dont have a fever the knot doesnt have edema it is kind of warm to touch but not extremely hot theres no red streaks running from it its not painful to touch Is it possible its just hematoma from me quite obviously hitting the vein which bled like crazy (and then injecting the same muscle again on another spot) Can it be an infection despite me lacking the aforementioned symptoms

Biologically-speaking, vitamin B12 is vital yet what are the main effects that it has on the body