Are you juicing or what cause ther is no possible way you can gain 12 lbs in one month, that is solely muscle, you would be hard pressed to put on 6. think about though if you put on let's say 10lbs of LBM a month then in 2 months you put on what many can't even do in a year. Congrats with the hard lifting but check you bf% or just say you are on the sauce, don't want you confusing people thinking there's some miracle supplement out there.