i started to practice self injection with vit b12 (quad shoot!).
today will be the 3rd one (dosage is 1000 per 1ml).
continue to be confused about aspiratin before injecting.
some people say "if you are in a vein or other blood vassel" youll see it easely!
some other told me to aspirate and wait for "very little air bubbles" and then push the dart...
questions: isnt "air" dangerous to inject?
last shoot (2nd one ever) i pulled pulled and pulled till a "big" bubble came into the b12 solution. i think that air came from "outside" my thigh and that i pushed "too much" (i felt like i was fighting with t!).
so i decidet to repeat entire procedure and changed needle!!
IM CONFUSED!!! HELP