MRI Black Powder Instant Release Pre Training Formula Fruit Explosion is a convergence of Medical Research Institute patented technologies, delivered in a rapid absorption pre-workout formula. MRI Performance Black Powder will get you amped, quickly. But there are a lot of products that stimulate your central nervous system (like a cup of coffee). MRI Black Powder Instant Release Pre Training Formula Fruit Explosion goes way beyond that. It is the most complete pre-workout formula ever conceived, spiked with ACTINOS2 IR. Here's what to expect: It literally takes a few moments for Black Powder to get absorbed and get to work. Take it no more than 30 minutes before your workout. You can actually take it right before you walk into the gym and start your first set!