F9 gives you an explosive boost of energy which will enhance your stamina and make your workout sessions more productive as it contains ingredients such as Beta-Alanine and Betaine Anhydrous. F9 boosts your focus as it contains L-Tyrosine and Caffeine which boosts mental alertness and helps you enhance the intensity of your workout. The L-Citrulline present in F9 gives a monstrous boost of blood to your muscles.