What is Jack3D?
Jack3D was a pre-workout which USP Labs created years ago. It was one of the most intense, and most popular pre-workouts on the market, especially amongst bodybuilders and power lifters. A few years back it was taken off the market and it's now back with a new and improved formula. Jack3d is an intense pre-workout formula and a powerful training aid to help you take your gym sessions to the next level.
