Pre-Training Formula for Bigger, Better Workouts*
Helps Promote Energy, Strength, and Testosterone and Reduce Feelings of Fatigue*
9.1  out of 10  (542 Reviews)
4 Sizes
30 Servings
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10 Flavors
Pink Lemonade
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Price: $29.99  ($1.00 / Serving)
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Product Overview

Testosterone Supporting Pre-Workout*
GAT Nitraflex. Hyperemia and Testosterone Enhancing Powder*


TeamGAT Athlete 2015 Arnold Champion

Citrulline Malate

The Most Seething Intensity

The Most Seething Intensity. GAT Sport Nitraflex bottle image
New Instant Exhilarating RTDs
12 Pack Case - 10 oz. Single Serving Bottles
The NITRAFLEX Advantages:
  • highly Concentrated
  • More than 3X Strength
  • Clinically Studied CFB+ Vascoactive Compounds
  • Amazingly Delicious Flavors
  • 1 Scoop Potency

NITRAFLEX is a clinically tested, high-intensity pre-training formula with potent ingredients to help magnify energy, alertness, strength, stamina, pumps and enhance Testosterone during workouts.*

GAT Sport Nitraflex. Same level potency on key ingredients!

Ratings & Reviews

Overall Rating
542 Ratings
Verified Buyer Rating
292 Ratings
Average Flavor Rating
10 Flavors
Top Rated Flavor
Pina Colada
By clicking the button above, you agree to entering the Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Dec 13, 2018

I have diabtes can I use it ? Type two

Dec 04, 2018
Verified Buyer
  • 1 Black Cherry

Product is ok. Black Cherry is identical to Nyquil cough medicine. The flavor gets a 0/10. Its disgusting unless you like taking meds before you work out.

Nov 03, 2018
Verified Buyer
  • 10 Pina Colada

Good pre-workout for any occasion. Pros: Good pump lasting ~1.5 hours Moderate paresthesia - Not too much like old Cellucor C4 but definitely noticeable Great flavor - Could drink this everyday and not hate myself Cons: Noticeable crash after workouts Definitely worth a try.

Nov 02, 2018
Verified Buyer
  • 10 Black Cherry

I cycle through my Preworkouts and Nitraflex is always the #1 go to!

Aug 24, 2018
  • 10 Blue Raspberry
  • 8 Green Apple

GAT Nitraflex is an excellent pre workout, it gave me a lot of energy when i didn't want to go to the gym and gave me a lot of energy when i was lifting heavy, on the other side it made me a little bit anxious and kind of felt nervous, it also made my arms a bit itchy for a very short period, but after starting to workout it went away. I find this product very efficient, it definitely gave me an amazing pump. Instagram: Iron_nephilim

Aug 15, 2018
Verified Buyer
  • 10 Pineapple
  • 10 Black Cherry
  • 6 Blue Raspberry

LOve this Pre Work

Jul 22, 2018
Verified Buyer
  • 9 Orange

I've just started using this so my thoughts are limited to time factors. I'm in my 60s but this product so far has been VERY helpful. I not only get fired up after taking it, I've notice a good pump during the workout. It has stuck w/me as well. I'll use it again when this is gone.

Jul 21, 2018
  • 10 Pina Colada

Nitraflex didn't necessary blow me away, but it was a solid product overall. Taste isn't a huge factor to me when it comes to a product, but the pina colada flavor is pretty much dead nutz on. It was a pre-workout treat, no doubt. Could feel the beta-alanine kicking in with each and every serving I took, so that was a welcomed plus, as it never seemed to diminish over the course of time. Pumps we're decent and for the money I'd say it's a good value as well. A solid 8 in my book. Just my 2 cents..

Jul 19, 2018
Verified Buyer
  • 10 Peach Mango

I've been using GAT Nitraflex for a few years now and I have yet to come across a flavor that I don't like, but Peach Mango has taken the trophy. Tastes just like the peachy-0's candy that I grew up on. I hope they never stop making this flavor.

Jul 16, 2018
Verified Buyer
  • 9 Black Cherry
  • 9 Green Apple

Every Person Is Different But While Using This Product I Get The Energy And Focus I Need. I’ve Used Other Pre Work Outs And This Is The One I Constantly Keep Buying. I Always Take Half A Scoop, I’m Usually In The Gym For 3-5 Hrs So This PWO Definitely Helps. I Recommend To Try This Product!!!

Jul 12, 2018
Verified Buyer
  • 9 Fruit Punch
  • 9 Pina Colada
  • 5 Peach Mango
  • 10 Blue Raspberry

It’s not rage workout educingbit it by no means a weak pre-workout. I used to come way down after my workouts with those vein exploding preworkouts and couldn’t get through the rest of my day. This is the perfect balance between the two. On another note regarding flavor. Some of the best tasting preworkout I’ve had so far. For those looking into the peach mango, it tastes just like you’re drinking peach -Os. I don’t taste any mango. Take that however you want

Jun 26, 2018

They are literally advertising how under dosed this supplement is. Absolute trash

Jun 17, 2018
  • 10 Pina Colada

Best tasting preworkout I’ve ever tried. I actually look forward to drinking it every morning. Gives me that nudge to hit th gym

Jun 11, 2018
Verified Buyer
  • 1 Black Cherry

Horrible after taste from the sucralose, not only is excessive but it lasted hours in spite of brushing my teeth and downing a liter of water. Trying to get healthy and this is loaded with sucralose, red 40 and blue 1? is it necessary for it to be so darn sweet? Yikes. The effect was no different than any other pre workout for me. I felt like i needed a bucket of salty movie theater popcorn to remove the fake sweetener from my mouth. I don't drink anything with sugar so it was particularly unbearable and overwhelming. I will return it and hopefully by the end of the day this hideous taste will be gone.

May 24, 2018
  • 10 Black Cherry
  • 9 Pina Colada

I’ve tried a lot of pre since I started working out years ago and this is honestly the best one yet. The product mixes extremely well and the flavor is phenomenal. I wasn’t sure at first I’d like the pina colada but if I didn’t know it was a pre I’d think it was juice. For someone who is highly sensitive to caffeine this product didn’t give me any adverse side effects that others do. I was able to maintain my energy levels for longer then usual and even found myself putting up weight I haven’t in a long time. Considering I need a shoulder replacement I thought I’d be struggling still with yet another pre, but it gave me the pump and boost to put up 10-15lbs more then before. I’ll be sticking with this company for a long time!

7 Servings
7 Servings
$1.57 Per Serving
8 Packets
8 Packets
8 Servings | $1.53 Per Serving
Variety Pack
12 - 10 Fl. Oz. Bottles
12 - 10 Fl. Oz. Bottles
10 Servings | $2.65 Per Serving


Serving Size: 1 Scoop (10 grams)
Servings Per Container:30
Amount Per Serving % DV
Niacin (As Nicotinic Acid) 25 mg 125%
Vasoactive Arginase-Regulating NO Precursor Complex       
Citrulline, Citrulline Malate, L-Arginine Alpha-Ketoglutarate, Resveratrol, Pterostilbene
Acute Energy, Focus, Intensity, Neuromodulating, Endurance Complex       
Beta Alanine (as CarnoSyn®), Caffeine, DMAE Bitartrate, N-Acetyl L-tyrosine, Theanine, Raulwolfia Canescenes (Extract)
Clinically-Studied Testosterone-Enhancing Complex       
Calcium fructopyranose borate (CFB) US Patent #5,962,049
** Daily Value not established
Other Ingredients:
Citric Acid, Pineapple Fruit Powder, Calcium Silicate, Silicon Dioxide, Acesulfame Potassium, Pink Himalayan Salt, Sucralose, Natural Flavors, Beet Root Powder (color).
One serving contains 325 MG Caffeine, 1500 MG of Carnosyn® Beta-Alanine, and a clinically researched dose of CFB (Calcium fructopyranose borate - US Patent #5,962,049)*
Beta-alanine is licensed under one or more US patents (#5,965,596; 6,426,361; 7,504,376; and 8,067,381) owned by Natural Alternatives International, Inc. (NAI). NAI also owns the registered trademark CarnoSyn®. Calcium fructopyranose borate is manufactured under US Patent #5,962,049 and licensed exclusively from VDF FutureCeuticals, Inc.

Directions For NITRAFLEX:


Training days: Day 1: Begin by assessing your tolerance with half a serving of NITRAFLEX™ mixed with 6oz of cold water. Days 2 and beyond: Depending on tolerance, mix 1 serving (1 scoop) of NITRAFLEX™ with 10oz 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.


Consume one 10 fl oz bottle of NITRAFLEX® within 20-30 minutes prior to working out. DO NOT CONSUME with any other products containing CAFFEINE with this product.

Warnings: 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 or non-steroidal anti-inflammatory drugs. 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 rior to surgery or if you experience rapid heartbeat, dizziness, severe headache or shortness of breath. Do not take within five hours of bedtime.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
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