Odd, most pre workouts supplements include caffeine. I use a pre-workout from a very famous supplement brand which includes 175 mg of caffeine and I can defini

Odd, most pre workouts supplements include caffeine. I use a pre-workout from a very famous supplement brand which includes 175 mg of caffeine and I can definitely tell the difference. I can't tell how much of that is because of the caffeine, because it has more stuff like creatine and L-carnitine among other things, but I cant I feel like I last more doing this and I have more energy.