GAT Nitraflex Review: Supplement Expert Says “It’s just Okay”

Written by Gudmundur Gudmundsson

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Fact Checked

It claims to be both a powerful pre-workout and a potent testosterone booster—this GAT Nitraflex review reveals the shocking reality.

The best supplements can take our training performance and results to the max. But, consuming numerous products for different aspects of our bodybuilding regime can prove inconvenient and time-consuming.

You know exactly what I’m saying.

So, if there’s a booster available that can cover two of the most important bases—performance and muscle building—it has to be worth a serious look.

This GAT Nitraflex review lifts the lid on this dual-purpose product. Leaving no stone unturned, it exposes the reality behind its ingredients, the effects (if any) they have, and whether it works.

Get ready bro’ because this article is gonna raise a few eyebrows.

GAT Nitraflex Review

GAT Nitraflex Review

Marketed mainly as a pre-workout, GAT Nitraflex declares it will enhance testosterone levels and create a state of hyperemia (increased blood delivery to the muscles).

It comes from the guys at GAT Sport, a Connecticut-based company which has been manufacturing nutritional products for over 20 years. At least, that’s what their blurb states.

Supplied in powder form, GAT Nitraflex is designed for use on both training and non-training days. It’s consumed before workouts to heighten performance and on rest days to boost testosterone levels and elevate muscle growth.

The manufacturer’s claim that using this product will:

  • Magnify energy levels.
  • Deliver fast and explosive training results.
  • Heighten free-testosterone levels.
  • Boost stamina, pumps, strength, recovery, and alertness.

Indeed, these are the results that the best pre-workouts can deliver.

But, stick with me bro’, and let’s delve a little deeper into this GAT Nitraflex review to see if it ranks among them.

How Does GAT Nitraflex Work?

It’s important to note in this Nitraflex GAT review that this product includes three proprietary blends—each targeting different aspects of training.

Later in this article, I’ll give you a detailed Nitraflex ingredients breakdown—but for now, here are the three blends and how they claim to work.

Vasoactive Arginase-Regulating NO Precursor Complex

This mix is designed to elevate blood supply by dilating the blood vessels. In doing so, greater levels of nutrients and oxygen are delivered to the muscles.

Theoretically, this should result in impressive pumps, heightened stamina, and faster muscle growth.1 2

Acute Energy, Focus, Intensity, Neuromodulating, Endurance Complex

A blend which has been formulated to boost performance by:

  • Elevating energy levels.
  • Reducing the build-up of lactic acid.3
  • Heightening focus and concentration through the inclusion of nootropics.4
  • Improving mood.

Clinically-Studied Testosterone-Enhancing Complex

Let me make something clear in this GAT Nitraflex review. This supplement, although claiming to be a testosterone booster, doesn’t include any of this hormone, nor will it increase its production.

Instead, it acts to decrease levels of SHBG (sex hormone binding globulin)—which can “tie up” testosterone rendering it unusable. Hence, existing stores of this important anabolic hormone are set free and allowed to promote anabolism.

GAT Nitraflex Ingredients

GAT Nitraflex Ingredients

Time to get down to the serious business in this GAT Nitraflex review—the ingredients.

As you can see from the above label, all of the 13 compounds are spread across three proprietary blends. Let me break them down into the individual ingredients found in this GAT pre workout testosterone booster.

Citrulline, Citrulline Malate, L-Arginine Malate, and L-Arginine Alpha-Ketoglutarate

These ingredients all act to boost levels of nitric oxide. This gas, sometimes referred to as NO, is a vasodilator. That is, it elevates oxygen delivery to the muscles by opening up the blood vessels.5 6 7

In doing so, stamina is increased and muscle protein synthesis is elevated.8


A phenolic compound, occurring naturally in plants, which research has indicated can reduce inflammation in muscle. This may result in improved recovery times and less soreness post-exercise.9

Furthermore, like citrulline and arginine, there’s some evidence that resveratrol can heighten nitric oxide production.10


A relation of resveratrol which exhibits antioxidant behaviors. This may improve recovery allowing you to hit the gym again sooner.11


During exercise, lactic acid can build up in the muscles—causing pain, fatigue, and ultimately failure.12

Beta-alanine supplementation promotes the production of carnosine—a molecule which lowers muscle acidity allowing you to complete your sets.13 14


I’m pleased to report in this GAT pre workout review that this compound is included.

Caffeine is a powerful stimulant found in the very best pre-workout supplements. It has the power to increase strength, raise focus, and boost energy alleviating fatigue.15 16 17

DMAE Bitartrate

There’s limited evidence that this compound can increase focus and memory. However, research has also indicated it’s teratogenic—that is, it can cause defects in embryos.18 19

Hence using Nitraflex for females as a training enhancement may not be a good idea.


An amino acid which can lower stress levels and increase vitality and energy.20


Another amino acid, found in tea. It has the ability to lower stress without causing drowsiness.21

Furthermore, it has the powerful effects of increasing alertness, lowering inflammation, and improving sleep quality.22 23 24

Rauwolfia Extract

A plant extract which research has shown can improve memory and concentration—in rats at least.25

Calcium Fructoborate

The only ingredient in the supplement designed to heighten free testosterone levels. This compound, found in fruit, contains boron—an element which research has shown can improve T-count.26 27

GAT Nitraflex Ingredients Breakdown

GAT Nitraflex Ingredients Breakdown

As shown in this GAT Nitraflex Review—it contains compounds which may work to improve stamina, strength, energy, focus, and recovery.

But are they the zenith of training-boosting ingredients?

The really effective pre-workouts on the market contain only the most potent and scientifically proven performance enhancers.

Let me show you in this GAT Nitraflex pre workout review what the best training supplements should contain, and how Nitraflex measures up.

  • ✓Caffeine
  • ✓Beta Alanine
  • ✓Citrulline Malate
  • ✘Betaine Anhydrous
  • ✓L-Theanine
  • ✘Acetyl-L-Carnitine
  • ✘Black pepper extract (Bioperine)
  • ✓L-Arginine

Here’s the positive. With five out of the eight best training boosters, it initially appears to be more than just an average supplement.

However—that doesn’t tell the whole story.

As you’ll recall from earlier in this GAT Nitraflex review, it contains three proprietary blends. Meaning, none of the ingredients are quantified. It’s impossible to know whether they’re in sufficient quantities to be effective.

Yet, we can make two educated deductions. Firstly, manufacturers usually hide ingredient volumes away for one simple reason—they’re too weak to have any noticeable effect.

Secondly, let’s look at the overall dose of 7240 mg. The most effective pre-workouts have at least 6000 mg of citrulline and 2000 mg of beta-alanine. That’s 8000 mg over just two ingredients—more than GAT Nitraflex in total (which has a further 11 compounds).

GAT Nitraflex Side Effects

GAT Nitraflex Side Effects

After examining the ingredients and reading what guys have experienced on the Nitraflex review reddit and forums—it appears there are few serious adverse effects reported after using this supplement.

However, I do need to state there are some minor Nitraflex hyperemia & testosterone enhancing powder side effects you may experience.

Firstly, beta-alanine is known to cause paresthesia—an itchy or tingly feeling. This is nothing to worry about, subsides quickly, and is more of an annoyance than a danger.

Secondly, some guys react badly to caffeine, which can invoke headaches, agitation, stomach upsets, and insomnia.

There’s one extremely frustrating aspect of writing about the GAT Nitraflex Review side effects. As there are no indications of the beta-alanine and caffeine doses—I can’t give advice on the likelihood of these unwelcome reactions.

GAT Nitraflex Before After Results

We’ve seen in this GAT Nitraflex review that, although containing proven training boosters, they may be underdosed.

However, I could be wrong. Perhaps it’s more potent than the science indicates.

Here are genuine testimonials from guys who have been using GAT Nitraflex to boost their workout performance. These are the results they’ve experienced:

“I mostly gained more focus and awareness. But nothing more.”

Alex Mumez

“Think my mood might have improved a bit. Might even be concentrating a bit harder. But no energy or stamina boosts and I’ve been using it for three weeks now”.

L J Spon

I honestly do not feel ANYTHING when taking this. I have not taken a pre-workout supplement before, don’t drink caffeine (coffee, soda nothing) so having a tolerance should not be an issue…I did notice a pounding headache.”

J Mazz

“After using it for 25 days now it shows no effect, my endurance is even getting weaker.”

J Hony

Worst pre-workout I’ve ever bought. I don’t even know if I can call it a pre-workout! I literally don’t feel anything. ZERO ENERGY…a waste of money.”

P Carpo

“Get more of a kick from a cup of coffee. Tastes awful and does nothing. Cash down the drain.”

L Fiddler

“Tried for one month and the only result I experienced were constant migraines. No pumps as promised, no more focus, and definitely no more energy. Simply doesn’t work despite all its claims. I’m gonna try something different.”

A Barl

Where to Buy GAT Nitraflex?

Despite this GAT Nitraflex review indicating that it appears mostly ineffective, you may still want to try it.

If that’s the case, it can be obtained from the official GAT sports website, Amazon, and

GAT Nitraflex Review Conclusion

GAT Nitraflex Review Conclusion

I was hoping this GAT Nitraflex Review would illustrate it’s both an effective T-enhancer and performance builder. Unfortunately, it lacks on both counts.

What’s most disappointing, is that the guys behind it have taken the time to ensure it contains some of the most potent training boosters, yet, they’ve then hidden their quantities away in a proprietary blend.

The overall dose of 7240 mg simply cannot contain sufficient amounts of the ingredients for them all to be effective. Furthermore, this supplement lacks the powerful and proven pre-workout staples of carnitine, theanine, and Bioperine.

Here’s the bottom line.

If you’re looking for a pre-workout—forget this product. Instead, search for one which includes the eight powerful training-enhancing ingredients listed earlier.

What’s more, if boosting T-levels is your goal, choose a supplement designed purely for that purpose.

GAT Nitraflex Review FAQ

“How to Take GAT Nitraflex?”

On training days, mix one scoop with 10 ounces of water and consume 30 minutes prior to the commencement of your workout. On rest days, take one scoop with water when you wake up.

It’s advisable to allow at least five hours between taking the product and sleep time.

“How Much Does GAT Nitraflex Cost?”

One container of GAT Nitraflex (300 grams-30 servings) costs $33.99 when purchased from the official GAT Nitraflex website.

“Is GAT Nitraflex Safe?”

All the ingredients in GAT Nitraflex are natural and shouldn’t cause any serious health issues.

However, none of the ingredients are quantified. This may be an issue with the caffeine content, which can cause adverse reactions in some people.

Additionally, the beta-alanine compound is known to cause an itchy feeling—while harmless, it may be annoying.

“Where Can You Buy GAT Nitraflex?”

This supplement can be purchased from the official GAT Sports website, Amazon, and

“Does GAT Nitraflex Really Work?”

Some users have indicated that this supplement has raised their concentration and focus levels. However, many more guys report that it has done little to increase their training performance.

Although containing some scientifically proven enhancers, it seems they’re too underdosed to have any effect.

“Is There a Money Back Guarantee?”

If the product is returned unopened within 30 days of purchase, then a full monetary refund is offered.

However, if the supplement has been opened, a credit against other GAT Sports merchandise is provided.

“How Long Do You Have to Take GAT Nitraflex Before Seeing Results?”

Probably a long time.

While some users did experience more mental cognition after one weeks’ use, improvements to training seem rare. Even after 30 days of consumption, many users witnessed no noticeable performance benefits.

“Does GAT Nitraflex Work for Weight Loss?”

As a pre-workout, this product is not designed for shedding pounds. There’s another product from GAT Sports called Burn—designed as a lean muscle builder and cutting aid.

However, every GAT Nitraflex Burn review that I’ve read has illustrated it’s not very effective.

“Do They Ship Worldwide?”

When purchasing this supplement from the official GAT Sports website, there’s no international availability. Free shipping is offered within the USA when the purchase exceeds $40.00.



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