NITRAFLEX® Hyperemia & Testosterone Enhancing PWD - Blue RaspberryBlue Raspberry | GNC

GAT™ NITRAFLEX™ Hyperemia & Testosterone Enhancing Pwd


Item # GATNITRAFLEXHyperemiaandTestosterone
Note: This product cannot be sold in Canada

Product Information



PHYSIOLOGICAL BASIS: “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™ pre-training 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.*

  • 1-SCOOP POTENCY*: NITRAFLEX is so potent, only 1 scoop (1 serving) is necessary. Do not exceed 1 scoop in a single 24-hour period. Do not take NITRAFLEX with 5 hours of bedtime.
  • HIGH CITRULLINE: ARGININE RATIO: Arginine is a proven precursor to nitric oxide (NO), a vasodilator. 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 ratio of citrulline to arginine may reduce this risk by avoiding overstimulation of arginase*.
  • 6 WEEKS OF TESTOSTERONE: Calcium fructopyranose borate (CFB) has been shown to increase testosterone in healthy 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 only 3 hours after a single dose of CFB.
  • EFFECTIVE DOSES OF BETA-ALANINE: The clinically-proven performance enhancer beta-alanine was not “fairy dusted” in this formula. Rather, we added an exceptionally powerful dose that you will feel working following your very first serving. (May promote slight, tingly-cerebral sensation)
  • CREATINE-FREE: Creatine causes water retention, which can make achieving a dry, hard muscular look even more difficult. Sometimes creatine is added to products precisely for this reason. (When you see yourself getting bloated, you may be fooled into thinking the product is “working.”) We left it out of NITRAFLEX precisely for this reason. Thus making NITRAFLEX ideal for pre-contest prep.
  • COGNITIVE ENHANCERS: 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 dilated and muscles pumped to the extreme. (DMAE)


Nutrition Facts
Serving Size  1 Scoop
Servings Per Container  30

Amount Per Serving     % DV

Vasoactive Arginase-Regulating NO Precursor Complex  0   **
Acute Energy, Focus, Intensity, Neuromodulating, Endurance Complex  0   **
Clinically-Studied Testosterone-Enhancing Complex  0   **
   Calcium fructopyranose borate (CFB) US Patent #5,962,049   **

** Daily Value (DV) not established.
Other Ingredients
Sodium Citrate, Sucralose, Natural & Artificial Blue Raspberry, Acesulfame-K, Silica, Alum Lake Blue #1
Label (click image to enlarge)

How To Use

Training days: Day 1: Begin by assessing your tolerance with half a scoop (½ scoop) of NITRAFLEX™ mixed with 6-8 oz of cold water. Days 2 and beyond: Depending on tolerance, mix 1 serving (1 scoop) of NITRAFLEX™ with 6-8 oz of cold water and consume within 30 minutes before working out.

Non-training days: Take 1 serving (1 scoop) upon arising in the morning or before any physical activity. Do not take more than 1 serving in a single 24-hour period. Do not take within five hours of bedtime.

Optional - Stack NITRAFLEX™ “Tablets”: Take 3-4 NITRAFLEX Stimulant-Free Tablets with 1 scoop of NITRAFLEX Powder 30 minutes before training for more dramatic effects.
This product is strictly intended for use by healthy persons 18 years of age or older. Each serving (1 scoop) contains 325 mg of caffeine. Do not combine with other caffeine or stimulant-containing products. Follow the instructions for assessing your tolerance. Do not use if you are pregnant, nursing or trying to become pregnant. Do not use if you are currently unaware of your health status or if you have a medical condition including but not limited to heart, liver, kidney, or thyroid disease, psychiatric or epileptic disorders, high or low blood pressure, cardiac arrhythmia, recurrent headaches, enlarged prostate or glaucoma. Do not use if you are taking prescription or non-prescription medication of any kind including but not limited to MAO inhibitors, anti-depressants, aspirin. Do not use if you are prone to overheating or dehydration. After 8 weeks of use, take 1 week off before resuming use. Discontinue at least 2 weeks prior to surgery or if you experience rapid heartbeat, dizziness, severe headache or shortness of breath.



4.9 / 5.0
13 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
The first time I tried this product someone gave me a sample pack, I held on to it for over a week until I remembered I had it and tried it and to my surprise, I went 2 hours extra/over my normal time of working out! The feeling was super good too. I finally bought a full size container and I'm enjoying it!
This stuff keeps you pumpin' and ready for hours, that's why it is a very valuable product for weight lifters, especially if/when you work during the day; I'd advise you to take it moments before clockin' out!
February 24, 2018
Good stuff
No such thing as too much good stuff. My workouts were starting to drag as my trainer added more strength and cardio intervals to my routine. What was taking 90 minutes off Nitraflex takes me 60 minutes on Nitraflex.
October 5, 2015
Works Fine
Works as directed, tastes fine. No issues with use at all
October 4, 2014
Love it !
This product is awesome. I have tried similar products from other companies and some some success and some not so much but GAT seems to price their items fairly and every product from GAT that I've tried has been outstanding ! !
February 4, 2014
Insane pumps !
This gives me insane pumps. I love it!
February 4, 2014
Great Pre-workout
Great tasting Pre-workout witout a crash
August 28, 2013
Worth every penny
The best preworkout product ive ever used
July 29, 2013
awsome product
everything about this product rocks, meets up to the label standards and exceeds !!!!!!
March 18, 2013
Works very well!!!!
surpasses Jack3d and C4
January 1, 2013
Good stuff
I was building a tolerance with C4 so I decided to cycle onto this. The first time taking this I took a full scoop, I could feel the intensity of the 300mg of caffeine almost right away, I had a killer workout. The next time I only took 3/4 of a scoop, which turned out to be just perfect for me (6'00" @ 185lbs).

Overall, this is a good Pre-workout drink, gives you great energy and pump. It has a good taste. No itchy affects. You can feel the testosterone boosts after only a couple of day of use.

There was only 2 major side effects that I found that kept me from giving this 5 stars. First, I found myself struggling to fall asleep at night when I would take this at around noon that day, due to the large amounts of caffeine per serving (325mg). Second, it gives me acne. It will probably effect everyone different, but those were mine.
November 29, 2012
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I have Chronic Myliod Lukemia , And take Glivac 400 mg ,have been on this for 15 years , but feel no negitive reaction when taking Nitraflex ! what do you think ?
John A on Mar 1, 2018