Met-Rx Isotonic Drink Mix is a technically advanced drink designed to support optimum functioning of mental & physical performance. The blend of beneficial ingredients, including amino acids & vitamins, helps to maintain mental focus, stamina & aler This product cotains caffeine, avoid additional consumption of caffiene. Contains Phenylalanine. Add one scoop (42.5g) to 500 ml of cold water to make a drink. Drink 250-300ml 3-5 minutes before exercise. After exercise, drink 250-500 ml.