Johnny Gringo
New member
For awhile now, I have been doing some seriuos cardio and training as I have been returning back to boxing after a while off. I was thinking about adding winstrol, but got to thinking B-12 injections may be a better alternative for me at this time. I know that B12 is known to increase endurance and how all that works, but does anyone think it would be that beneficial?? Any help would be much appreciated. I've taken B12 before and didn't notice much of anything, but then I wasn't doing any cardio or concerned with endurace either.