While some products may cause the excitation you need to get motivated to get into the gym and move weight around, but unless you also have some "energy in the tank" you're not going to perform your best. Yet, with USPlabs Jack3d, you'll not only have to force yourself to get out of the gym, but you'll get more repetitions in while you're there. More repetitions will ultimately lead to more muscle mass. USPlabs Jack3d has a precise blend of compounds that will not only get you flying through your workouts like a mad man, but will allow you to have hours upon hours of energy without a harsh crash at the end. In essence, this product hits both angles, allowing you to increase strength, power, focus and stamina, while providing the motivation to get into the gym. The end result is better performance in the gym and ultimately, more muscle mass. * Picture may be of different size or flavor