jack3d endurance

[eliteathlete]

does jack3d kill your endurance if you are a sprinter..
cause ive taken it before and performance felt down effected.. just wondering what you guys think..
maybe to take it during just training and not on competition days??

[Ashop]

I think it could just depend on the individual. I know sprinters who use jack3d's active
ingredient. For myself I think it would be a little too strong.

[Naturall]

cause i used jack3d for a while and my performance was going downhill not sure as of why.. but i went off it for a month and im gunna give it one last try and see how things go.. im hoping for the best.. cause i got a biggg meet in aprilll