Over ten years ago when I used workout in college(about 4 years straight solid experience, and yes I was pretty jacked) I would mega dose the stuff and wash it down with 100grams of twinlabs carbofuel. About 30 minutes after taking it my body would turn bright red, and burn like a sunburn. It would go away over a period of about 15 to 20 minutes, and my pumps and endurance was unreal. Obviously I wont take the stuff to the degree that I was in the past. That was just plain stupid, and possibly life threatening. But....I do wanna give it a shot again. If I remember right. With enough carbs and protein, I felt pumped all day long.