JNX Sports’ Original Pre-Workout Formula The Curse! Pre-Workout Powder – for more energy, more stamina and more results. Scientifically formulated with a powerful blend of ingredients engineered to amplify strength and performance. Powerful Ingredients for Real Results The Curse! is formulated with Caffeine to get you energized and locked in, so you can zero in on your goals and smash them;* while Beta-Alanine and Creatine enhance endurance and explosive power.* Nitric oxide boosters L-Citrulline and L-Arginine stimulate blood flow, improving oxygen and nutrient delivery to working muscles.*