Nitrix Core 360 Tabs

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Fight Series Pre-Workout Stack - The Ultimate Pre-Workout Experience!

K.O Knock Out & Pre-Workout are each great products even when taken on their own, but stack them together & you have the ultimate pre-workout stack. These two products were designed to go hand in hand and help you destroy each workout & smash your goals. Viper Pre-workout is more stimulant heavy, delivering massive amounts of raw energy & power, while Knockout is the more scientific formula aiding with mental focus, nutrient delivery and extreme pumps.


Stack Features

  • Viper Nutrition K.O Knock Out 30 Serve 
  • Viper Nutrition Pre-Workout 30 Serve
  • Viper Nutrition Shaker


K.O Knockout By Viper Nutrition - Pre Workout Amplifier!

K.O Knockout By Viper Nutrition is a Pre-Workout Amplifier formulated to help you get the most out of each training session. With ground-breaking ingredients designed to fight fatigue increase muscle size and strength as well as deliver massive pumps KO really covers all bases. KO Knockout is perfectly designed to stack with VIPER Pre-Workout to give an even more explosive pre-workout experience.

Key Points:

  • Increased Energy
  • Increased Focus
  • Skin Splitting Pumps
  • No Crash
  • Delicious Flavours
  • Natural Flavours


Pre Workout by Viper Nutrition - Next Level Pre-Workout!

Our pre-workout is designed to pack a knockout punch and keep you pushing your limits with one of the most powerful formulas on the market. Every 2 scoop serving delivers a massive 500mg of caffeine, 2000mg of Carnosyn® beta alanine, 2000mg L-Arginine, 1000mg L-Ornithine, 2000mg of betaine, 3000mg of creatine, in addition to vitamin C, B6, l-glutamine and BCAAs. The result is a product that will exceed your preconceptions of what a preworkout supplement should be, and keep you amped and focused through the toughest of workouts.

  • No Proprietary Blends
  • Zero Sugar
  • 500mg of Caffeine Anhydrous
  • 2000mg Carnosyn® Beta Alanine
  • 2000mg Betaine
  • 3000mg Creatine Monohydrate
  • 2000mg L-Arginine
  • 1000mg L-Ornithine
  • 1100mg of BCAAs in 2:1:1 ratio
  • Delicious, all-natural, fruit-based flavoring system
  • No banned substances – 2016 WADA compliant



Mix 1 scoop of Pre and 1 scoop of K.O. together, drink and get ready come out fighting. 

Like a lethal left right combination FIGHT SERIES is going to hit you hard.

K.O Knock Out Nutritional Info

KO Knockout

Pre-Workout Nutritional Info

Viper Nutrition Pre-Workout