I was a bit skeptical at first when a friend of mine recommended me Muscle-Rx as a pre workout supplement. After trying it, it definitely shocked me with the results I’ve experienced, as I was able to push harder and stronger in my workouts even on the first dose. I’ve also noticed I have increased in vascularity ever since I started using it. It is definitely one of the best pre workout supplements I’ve ever used, even better than most nitric oxide out there.