Peak Performance Labs Nuclear Pump (440g) - Mega Dosed Stim Free Pump Pre Workout PEAK PUMPS. PEAK PERFORMANCE.Nuclear pump is more than just a "pump" product but a complete and comprehensive stim free pre workout that is extremely versatile. A stimulant free pre workout is a great option for those wanting everything in a pre workout without the accelerated heart rate and side effects of jitters and anxiety which is a common occurrence in higher stimmed pre workouts. This could be particularly useful for those wanting to cycle off stims to give there adrenals a break or even using it in prep or a cutting phase where fat burners are used as most traditional fat burners do not contain anything for pump and performance. Nuclear Pump Highlights: Intense, Skin-Tearing Pumps Stim-Free Science-Backed Pre Workout Razor-Sharp Focus Without The Crash Delicious flavour How to use Nuclear Pump: First Directions:Mix 1 scoop with 450-500ml (15-17 oz) of water approximately 20 minutes before training. Regular Directions:Mix 2 scoops (1 serving) with 450-500ml (15-17 oz) of water approximately 20 minutes before training.