Just be careful if you are using the big blast preworkout with amp02.
I was taking both and it was total nitric oxide overload. I didn't realize what was going on at first. I kept puking during or after my workouts. I thought it was the tren... Turned out to be total overload with amp02 and big blast. Stop taking the big blast preworkout and making my own preworkout concotion that included SPP, Carbs, Fats, and Protein.