Discover Optimum Nutrition Gold Standard Pre Workout Powder. This ready-to-mix energy drink is designed to improve your focus, power, and performance* before and during your workout. ON Gold Standard food supplement is Informed Choice Certified and contains a carefully-selected list of ingredients. Its packed with 175 mg of caffeine from natural sources to help increase alertness and focus before training*. Each serving provides 3.4 g of creatine monohydrate that helps support your power,and performance,. This great-tasting sports drink also contains Vitamins B 1, B 3, B 5, B 6, and B 12, which all contribute to normal energy-yielding metabolism**. On top of that, it also includes Beta-Alanine (Carnosyn), Citrulline, L-Carnitine, and N-Acetyl-Tyrosine.