Optimum Nutrition Gold Standard Pre-Workout is comprised of the highest quality ingredients which are certified by Informed Choice to be free of contaminants. Optimum's mix of aminos, creatine, caffeine and beta-alanine are blended to give you the energy and focus you need for the toughest workouts.
This formula raises the bar by providing you with only what you need to achieve your goals —made with select banned substance free ingredients, including caffeine from only natural sources (tea and coffee bean) to help dial in intense energy, mental alertness, and sharp focus before you hit the gym. Optimum Nutrition Gold Standard Pre-Workout is also made with only premium ingredients including CarnoSyn Beta-Alanine, which supports your intramuscular buffering system to help you train harder, longer and German-engineered Creapure Creatine Monohydrate — one of the industry's most well-known providers of high purity creatine monohydrate.* Finally, the Gold Standard of pre-workouts includes L-Citrulline Malate — a precursor to Nitric Oxide (N.O.) synthesis and other ingredients such as AstraGIN and Acetyl-L-Carnitine HCI to round out this powerful formulation.