Gauge Pre Workout is the one of the best pre-workout formulas on the market, giving you serious energy without the jitters. 4Gauge uses recent scientific discoveries to unlock energy that comes from all natural ingredients for lasting energy without a crash. And that tingly feeling that comes from Beta-Alanine? Nope. Not in this formula. On top of that they use the gold standard for vasodilation, Cirtrulline, which comes from watermelon. This opens those blood vessels, providing nourishment and power to those working muscles so you can go the distance without hitting the wall.