Optimum Nutrition Gold Standard Pre-Workout Advanced 420gOptimum Nutrition, the World’s 1 sports nutrition brand*, brings you the intense and dialled-up version of our core pre-workout powder. Meet the ON Gold Standard Pre Workout Advanced sports food supplement designed for high-performance athletes and true sports enthusiasts. This intense pre-workout formula supports energy and focus to support your peak training.When compared to the Gold Standard pre-workout powder, this advanced powder contains 8x more L-Citrulline and 2x more Beta-Alanine per serving. The ON formula contains 200 mg of caffeine from natural sources per serving, making it a great energy and focus drink that increases alertness and improves concentration***, helping you achieve your fitness goals.The ON Advanced pre-workout supplement contains vitamins B6, B12, niacin, and pantothenic acid, which aid in the maintenance of normal energy-yielding metabolism and the reduction of tiredness and fatigue**. Designed for the goal-focused athlete, the ON pre-workout come in 3 great-tasting flavours – Tropical, Sour Gummy and Fruit Punch– and are an easy and convenient addition to your daily protein snacks.