Pre-Training Formula for Bigger, Better Workouts*
Helps Promote Energy, Strength, and Testosterone and Reduce Feelings of Fatigue*
9.1  out of 10  (546 Reviews)

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
546 Ratings
Verified Buyer Rating
294 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.
Feb 24, 2019
  • 10 Blue Raspberry

Great product, I only use half a scoop and it is enough for me. If I take it after 6, I am up till 2 in the morning. Highly recommend

Feb 21, 2019
  • 10 Fruit Punch
Jan 07, 2019
Verified Buyer
  • 9 Orange
  • 10 Pineapple
  • 9 Green Apple
  • 8 Blue Raspberry

I love this product the boost it gives me before the gym is amazing i get in there and max out all the time and still have energy after to go home and do family thing. (2-4 hr. Workout)

Dec 21, 2018
Verified Buyer
  • 10 Blue Raspberry

Love this product in the gym. Best I’ve taken in reguardless to both flavor and effect. Stay away if you frequently finding yourself in bed lol. This product is not you little guys best friend

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

3 Sizes
30 Servings
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12 Flavors
Peach Mango
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Price: $29.99  ($1.00 / Serving)
Flavor Rating: 7.5


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, Natural And Artificial Flavors, Acesulfame Potassium, Sucralose, FD&C Yellow #5 (Dye), FD&C Red#40 (Dye.)
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.


WARNING: 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. 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 dtugs. 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. This product contains a chemical known to the state of California to cause birth defects or other reproductive harm. KEEP OUT OF THE REACH OF CHILDREN.


* 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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