hehe.....One thing I want to use instead of injectable is the pill form of methylcobalamin because it's even cheaper,but haven't tried it.
It should work.Had a hard time breaking 193 at 5'8" and then with the B-12 injections,I went to 203 without breaking a sweat a little over 2 weeks.Had plenty of energy.At 193 I was feeling heavy.At 203,I still feel I could have put more pounds on.
I got this information from the Steroid handbook that said Bodybuilders were going to mexico for the B-12 shots back in the 90's.