ON Optimum Nutrition Gold Standard Pre Workout packs 175mg of two forms of caffeine (tea and coffee bean) plus beta alanine and 3g of creatine. It doesn't stop there, using the hottest ingredient in AstraGIN, all the ingredients in GS PRE will hit your system hard due to a higher bio availability (ability for the body to absorb). This formula raises the bar by providing you with only what you need to achieve your True Strength —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. 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.