Powerful sugar free pre workout shot 3000mg beta alanine 200mg caffeine 300mg sustamine also available in a 12 pack vmx2 shot is an ultra powerful pre workout formulation in a convenient shot format containing beta alanine arginine citrulline malate and sustamine as well as vitamins b6 and b12 to help reduce tiredness and fatigue vmx2 shot is the ideal formula to help maximize your training vmx2 shot is sugar free and suitable for athletes on a low carbohydrate diet seeking only