b12 injections

I've been prescribed b12 injection every 2 weeks. Ask i have are the insulin pins I use for my test cyp. Is there any reason I can do my b12 shot shadow IM/subq? Also, I'm supposed to use a full mL, is that too much to do subq?

I wanted to see how many guys were doing B12 shots. I've done them over the past year and don't really see a difference. What's your experience been?

Was just wondering if anyone knew where to find affordable b12 injections without a script. I'm deficient in b12 and get once monthly injections but my levels are still low. My primary doc told me to start supplementing with otc b12 in addition to the shot but numbers are still low. Was...