Pre-Training Formula for Bigger, Better Workouts*
Helps Promote Energy, Strength, and Testosterone and Reduce Feelings of Fatigue*
9.1  out of 10  (560 Reviews)
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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
560 Ratings
Verified Buyer Rating
305 Ratings
Average Flavor Rating
13 Flavors
Top Rated Flavor
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.
Mar 17, 2020
Verified Buyer
  • 8 Peach Ice Tea

My favorite "middle of the road" (in strength) pre workout. A good kick start that wont keep me up all night if my workout gets cut short and the only pre workout that doesn't give me heartburn for the rest of the night after drinking it.

Nov 23, 2019
Verified Buyer
  • 10 Grape

The flavor is just amazing. It gives me great pump to, great job GAT! Wold buy this product again and try other flavor.

Nov 16, 2019
Verified Buyer
  • 1 Peach Ice Tea

Showed a 10/10 rating but tastes AWFUL. Worst tasting pre I’ve ever tried.

Oct 17, 2019
Verified Buyer
  • 10 Peach Ice Tea

The peach iced tea tastes great, only flavor I've tried so far so I don't know about any other ones. As for results I experience zero fatigue working out so I really know where I'm at with weight , rep, and set amounts, and what I can do. As for a pre-workout I like it more than energy drinks plus its cheaper than other energy drinks I've been using as a pre-workout. I take this in combination with Nitra flex pump as well as the multi-vitamin with test, only been taking for three weeks a few times a week and I have seen results. Works for maximizing gains when I workout. It helps my cardio's both and my workouts. This is a product that I always talk about with people I love it and will buy again and again. It has so many flavors to choose from as well. I've taken medication with this and it says not to on the labeling, just drink water if that happens to anyone else. It helps if you actually workout when you take it so you can kind of metabolize it faster. Just set a time of day to take it and workout. No crash as well as will give you energy to do other things that day too.

Oct 01, 2019
Verified Buyer
  • 10 Grape

I've taken different pre-workout supplements. I will say the grape Nitea-flex is by far the best tasting I've tried. Decent pump. Lots of energy. Read the warning on the label! Do not consume more caffeine for around 8 hours. I'm a truck driver, & wanted to THROW my rig at someone after a small cup of coffee an hour after drinking this.

Sep 24, 2019
Verified Buyer
  • 9 Black Cherry
  • 5 Green Apple
  • 9 Orange

They changed something, new proprietary is not as effective

Aug 18, 2019
  • 10 Pink Lemonade
Jun 16, 2019
Verified Buyer
  • 10 Fruit Punch

Take this with NitraFlex Pump. Very good results of energy and more pumps when it comes to reps. Use these for early morning workouts to start the day.

Jun 02, 2019
Verified Buyer
  • 10 Black Cherry
  • 10 Watermelon

very good stuff . give good boost and focus . if it was with creatine & BCAA it could be the best !

May 14, 2019
Verified Buyer
  • 6 Watermelon

Gives a good boost of energy and focus, plus a pretty decent pump. Only thing I can complain about is it seems inconsistent. Might be just me but some days it feels really strong, other days I don't feel much at all. Watermelon flavor is drinkable but not delicious by any means.

Apr 22, 2019
  • 9 Orange

Try the tolerance dosage today for the first time and I got a pretty decent pump out of it. I slept like crap last night but still had a great workout. Started feeling it in my hands first, tingly feeling, then the face about 5 min later. At the gym, an itchy face which is pretty standard for me when I use pre-workouts so it really didn't bother me. The only reason I didn't give it a perfect 10 was because of the flavor. Don't get me wrong its good, it's just not great. Still, a solid product and will purchase again.

Apr 20, 2019
  • 9 Black Cherry

This is a **** never wrecking product, it gives you the pump you are dreaming off but downside no sleep plus very less amount of citrulline malate leaves you with soreness. PS:Tried on Indian genes here

Apr 12, 2019
Verified Buyer
  • 4 Pina Colada

Product is great, good energy boosting supp, but I wasn’t a fan of pina colada flavor, I’ll try a different flavor next time

Apr 01, 2019
Verified Buyer
  • 10 Black Cherry

This is the best pre I have used. Very easy to mix. No clumping and fast to mix. This flavor is great. Fast acting and lasts the workout. Very much worth it.

Apr 01, 2019
Verified Buyer
  • 10 Black Cherry

Eh, doesn’t work.

2 Sizes
12 - 10 Fl. Oz. Bottles
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2 Flavors
Orange Ice
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Price: $24.49  ($2.45 / Serving)
Flavor Rating:
Helps Promote Energy, Strength, and Testosterone and Reduce Feelings of Fatigue*

What's in GAT NITRAFLEX Pre Workout

Serving Size: 10 fl. oz. (295.74 mL)
Servings Per Container:12
Amount Per Serving % DV
Calories 10       
Carbohydrate 2 g 1%
Niacin (as Niacin) 75 mg 375%
Sodium 25 mg 1%
Vasoactive Arginase-Regulating No Precursor Complex RTD       
Citrulline Malate, L-Arginine Malate, L-Arginine, Alpha-ketoglutarate
Acute Energy, Focus, Intensity, Neuromodulating, Endurance Complex       
Beta-Alanine (as Carnosyn®), Caffeine, N-Acetyl-L-tyrosine
Clinically-Studied Testosterone-Enhancing Complex       
Calcium Fructopyranose Borate (CFB) FruiteX-B® US Patent #5,962,049
** Daily Value not established
Other Ingredients:
Water, Natural and Artificial Flavor, Potassium Sorbate, Malic Acid, Sodium Benzoate, Sucralose, Acesulfame-K.

Directions For NITRAFLEX Pre Workout:


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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