Grenade 50. calibre is a hard-hitting, pre-workout detonator designed to make every workout an explosive energy fuelled assault. Explosive Energy, Strength and Endurance Contains, Citrulline Malate, Creatine, Amino Acids and Caffeine Consume 30 mins prior to training for the ultimate pre-workout ammunition Powered by grenade, the multi award winning sports nutrition specialists, 50 Calibre combines full potency dosages of research-validated ingredients so as to deliver devastating energy levels and incredible pumps! 50 Calibre also contains MDS (Muscle Defence System) - anti catabolic support designed to help avoid excess muscle breakdown.