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GAT Sport Nitraflex®

German American Technologies has taken Nitric Oxide, Vasodilating Preworkouts to the next level by adding powerful Testosterone enhancers to provide the strongest pumps and hormonal support in Nitraflex.

Reactive hyperemia describes the increase in muscle blood flow that occurs during high-intensity resistance exercise and produces the "pump" associated with increases in muscle size. The Nitraflex pretraining formula contains ingredients that in vitro, animal and clinical studies suggest possess properties that may help advanced athletes maximize energy, intensity, vascularity and reactive hyperemia (pumps) during their workouts, and provide long-term support of testosterone and nitric oxide levels in the healthy range when used as directed.


Arginine is a proven precursor in nitric oxide (NO), a vasodialator. What most people don't know is that Arginine supplementation stimulates the activity of arginase, an enzyme that breaks down Arginine. Over time, this may actually result in reduced Arginine and NO levels in turn causing your preworkout formula to stop working. Research suggests that supplementing with a high ration of citrulline to Arginine may reduce this risk by avoiding overstimulation of arginase.

Hormone Support

Calcium fructopyranose borate (CFB) has been shown to increase testosterone in health subjects. The average increase in total and free testosterone in a 6-week study was 56% and 29.5% respectively. In a second study, total and free testosterone increased on 3 hours after a single dose of CFB.

Acute Performance Increase

The clinically-proven performance enhancer beta-alanine was not "fairy dusted" in this formula. Rather, we added an exceptionally powerful does that you will feel working following your very first serving.

Nitraflex contains unique ratios of scientifically validated compounds that help you remain alert, intense and focused while you're flying from set to set with veins fully dialated and muscles pumped to the hilt.

Highlights of GAT Sport Nitraflex®:

  • Powerful Energy: Contains 325mg Caffeine
  • Highest Concentration (More than 3x Strength)
  • Boost Testosterone
  • Break Strength Barriers
  • Massive Muscle Pumps
Customer Reviews
4.9 Based on 45 Reviews
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Trev P.
United States

Good pre workout

Overall good pre workout. Pumps were good and focus was great! Will buy again

A Tiger Fitness Customer
Amanda R.
United States United States

rocket fuel

this is like rocket fuel . my goto pre since clash has been our of stock

Anthony M.
United States United States

Awseome Pre Workout

Strong and gives great pump! Makes you feel focused and ready to do and get through hard workout! Highly recommend!

Michael C.
United States United States

Great stuff

Gat is an awesome product great pump no jitters would highly recommend it. Will definitely buy it from tiger fitness they sent it when they said they would and I got a tracking number with it so I could keep up with it.

Hunter H.
United States United States

Excellent product, excellent company

I had previously tried a sample of Nitraflex and enjoyed it, so I pulled the trigger on a full tub. It was an excellent choice! Great quality of ingredients and flavor was adequate. My workouts are consistently supercharged without the crazy crash or jitters that come with other heavier stem pre’s. Ordering was simple and my product arrived in just a few days. Will be ordering again! 

Nutrition Info

Warning Concerning California Residents: This product may contain chemicals known to the State of California to cause cancer and birth defects or reproductive harm.