There is nothing quite like a high-octane training session, so it is no surprise that pre-workout supplements have become so popular. However, those long lists of ingredients in proprietary blends only create the façade of an effective supplement when all you really end up with is enough caffeine to “feel” it and little else. Until Rhino BLACK. MuscleSport International is PROUD to bring you the best that science has to offer, so there are no blends. Only efficaciously-dosed, proven ingredients that have been carefully selected to provide all that is needed from a pre-workout: energy, focus, pumps, and performance. Here are just a few of the rigorously validated ingredients in Rhino BLACK.