Welcome to our comprehensive one-stop-shop GAT Nitraflex review.
Gat Nitraflex from Gat Sport is a pre-workout supplement that is also designed to help raise testosterone. Nitraflex contains 12 ingredients in the form of a proprietary blend of 10.3-grams per serving which delivers just over 6-grams of active ingredients. Nitraflex pre-workout does not reveal the exact dosage of ingredients except for caffeine 325 mg and boron 200 mg. L-Citrulline, Beta-alanine and more ingredients included in the formula er probably under-dosed.
In some ways, the world of dietary supplements can be likened to the Wild West… not entirely lawless, but ripe for exploitation and, in some instances, a little bit dangerous. Unfortunately, pre-workouts take on the outlaw role pretty seamlessly, constantly blurring the line between effective training aid and potentially harmful drug.
As a result, it is vitally important that you undertake some rudimentary research, at the very least, before purchasing one of the many pre-workout options available to you. And, that, ladies and gentlemen, is where we come in!
An in depth analysis of yet another pre-workout supplement, providing all the knowledge you need to make an informed decision about GAT Nitraflex and whether it’s the right supplement for you.
There is no hidden agenda, no marketing bullshit, just the cold hard science and what it really tells us about this product’s ingredients and their dosages!

What is GAT Nitraflex?
According to GAT Sport’s official product description, Nitraflex is a “clinically tested, high-intensity pre-training formula” with “potent ingredients to help magnify energy, alertness, strength, stamina, pumps and free testosterone during workouts.”
That’s a pretty comprehensive list of supposed benefits, even for a pre-workout! Whether or not Nitraflex can deliver on those promises depends on the ingredients included and their specific dosages. So.. let’s take a closer look!
Ingredients in GAT Nitraflex pre-workout
| Serving size: 1 Scoop (10.3 grams) | Amount Per Serving | %Daily Value |
| Calories | 5 | |
| Total Carbohydrates | 1g | 0% |
| Niacin | 25 mg | 156% |
| Sodium | 85mg | 4% |
| NITRAFLEX PROPRIECEUTICAL BLEND | 6521 mg | * |
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Vasoactive Arginine-Regulating NO Precursor Complex (L-Citrulline, Arginine Silicate Inositol (as Nitrosigine®), Resveratrol, Pterostilbene)
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Acute Energy, Focus Intensity, Neuromodulating, Endurance Complex (Beta-Alanine, L-Tyrosine, Caffeine Anhydrous, DMAE Bitartrate, L-Theanine, Rauwolfia Vomitoria Root Extract)
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Clinically-Studied Testosterone-Enhancing Complex
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| Boron Citrate | 200 mg | * |
There is one issue of huge importance to consider before we take a closer look at which ingredients make the cut in this GAT Sports manufactured pre-workout… Are there are any signs of a proprietary blend…?
For the uninitiated, that’s when the company who produce a supplement choose to group ingredients in one or more blends without listing the exact quantity of each individual ingredient per serving. This means it is nigh on impossible for you, the consumer, to work out how much of any of the active ingredients you are actually putting in your body every time you consume a scoop.
Despite what supplement manufacturers try to tell you, there is only one valid reason they do this… And that is to hide underdosed key ingredients from their potential customers.
So… what about Nitraflex? Well, it contains one giant proprietary blend named the “Nitraflex Proprieceutical Blend,” totaling 6521 mg. Under this headline, 3 component blends contain as many as 12 unique ingredients, without a single one of their dosages listed.
As a result, you as the consumer are aware of which ingredients are included and that their total combined weight per serving amounts to 7240 mg, but that is about it. Unfortunately, without a laboratory in your living room, there is no way of working out exactly how much of anything you are consuming!
NOT a great start to our GAT Nitraflex review!!
Vasoactive Arginase-Regulating NO Precursor Complex
Now there’s a long way of saying ‘pump matrix.’ But, with ingredients including citrulline and arginine, the intention of this proprietary blend is fairly obvious. It’s all about muscle pump!
There is no denying the efficacy of citrulline for achieving such effects either. It appears in pre-workout formulas with growing frequency, and there is a good reason for it. Dosed at appropriate levels, citrulline helps you to produce more nitric oxide, which in turn boosts your circulation and allows more oxygen and nutrients to reach your working muscle during training.[1]
In order to achieve these benefits, l-citrulline must be dosed at 3-6g per day for at least a week.[2] The optimal dose of citrulline malate is more like 6-8g per day.[3] Whilst it is mathematically possible for there to be 3-6g of l-citrulline and/or 6-8g of citrulline malate within this blend, it seems pretty unlikely given that there are so many other ingredients within the total weight of 7240 mg.
The inclusion of arginine is irrelevant. It has been scientifically demonstrated to be ineffective at raising nitric oxide levels in the blood because it is too readily metabolized in the liver.[4]
All in all, it is hard for us to judge whether there is enough in this NO precursor complex to generate the desired pump effect!
Acute Energy, Focus, Intensity, Neuromodulating, Endurance Complex
Another ridiculously over-complicated name for a proprietary blend containing beta-alanine, caffeine, and l-tyrosine. Now, despite the dosages of these ingredients not being listed on the ‘Supplement Facts’ label, there is a note on the official GAT Sport website which reveals how much beta-alanine and caffeine is in one serving of Nitraflex, so at least we can evaluate the efficacy of these two ingredients.
There is a whopping 325 mg of caffeine per serving which should be enough to get even the most hardened stimulant users absolutely buzzing. With plenty of scientific research to suggest that caffeine can have tangible benefits for energy and focus and fat burning, such a significant dose is a real positive. Be warned, however, if you are new to pre-workouts or generally have a low caffeine tolerance, then this dose might be too much for you! Finally, something for our GAT Nitraflex review to be positive about!
Unfortunately, the 1500 mg dose of beta alanine brings us crashing back down to earth pretty quickly! This ingredient has the potential to revolutionise your exercise performance, helping to buffer lactic acid and in turn improve endurance.[5] It can only do that, however, if it is dosed optimally, and 1500 mg just isn’t going to cut it. Most of the science suggests that 4-6g per day for a number of weeks should be adequate for you to reap the benefits.[6]
There is very little research to support the efficacy of tyrosine for exercise performance and no credible information concerning effective or even safe dosages. As a result, our GAT Nitraflex review considers its inclusion in any dose inconsequential!
Clinically-Studied Testosterone-Enhancing Complex
This final blend contains a single ingredient. Boron. There is some research available on Boron. It is a promising ingredient; however, we are not sure if a single ingredient can have a real effect on increasing testosterone.
Side effects
Pre-workout supplements often come with a list of potential minor side effects.
Most of these are associated with the consumption of high doses of stimulant ingredients such as caffeine.
GAT Nitraflex contains a fairly hefty 325 mg serving of caffeine per scoop and therefore may elicit side effects including diarrhea, vomiting, anxiety and the jitters.
If you are new to pre-workout supplements or have a particularly low caffeine tolerance, then it may be sensible to start with a half dose of Nitraflex before building gradually towards a full dose.
The only other ingredient in this pre-workout that has the potential to cause side effects is beta-alanine.
This tends to cause a tingling sensation on the skin’s surface immediately after consumption which lasts no longer than about 20 minutes.
This is in no way harmful and should instead be taken as a sign that you are consuming a worthwhile serving of this ingredient. In all honesty, the 1.5g per scoop of beta-alanine in this pre-workout is unlikely to be enough to elicit such a response anyway.
So, is GAT Nitraflex any good or just hype?
The use of proprietary blends makes it pretty difficult for our Nitraflex pre-workout review to judge whether this product lives up to the hype. However, the big dose of caffeine is certainly more than hype.
Whilst it’s mathematically possible for there to be something close to an optimal dose of citrulline included, it seems unlikely. Add to that the mediocre serving of beta-alanine, and we think it’s fair to say that this product is certainly more hype than good!
Pros and cons of GAT Nitraflex pre-workout
| Pros | Cons |
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Pricing
At $34.99 on the official GAT Sport website, Nitraflex pre-workout comes in just over a buck per serving. This puts it pretty much in the middle of the road as far as cost goes.
Summary
It’s almost impossible for our GAT Nitraflex review to look beyond the manufacturer’s use of one giant proprietary blend. Except for caffeine and beta-alanine, the quantities of which GAT Sport chooses to disclose on their website, the dosages of active ingredients have kept a mystery.
This means YOU, as a consumer, literally have no idea how much of these ingredients you are putting in your body. They could be included at ineffective levels (most likely) or even dangerously high levels. You have no concrete way of knowing. And that, my friends, is the ultimate sin for any pre-workout product.
Whilst monumental dosing of caffeine goes some way to rescuing Nitraflex, it comes crashing back down to earth fairly quickly with a pathetic dose of one of the most exciting supplements on the market in beta-alanine. And don’t even get us started wasting space in a scoop with an ingredient that has next to no scientific research to support their inclusion.
Our overall assessment…? A major disappointment!
FAQ
Does Gat Nitraflex increase testosterone?
Nitraflex pre-workout contains an ingredient called boron which is included as a testosterone booster. There is some research available on Boron as an active testosterone booster, but most great testosterone boosting supplements on the market today contain around 10 proven ingredients.
When should I take Nitraflex?
According to the official GAT Sport website, Nitraflex should be taken as such:
Training days: Day 1: Begin by assessing your tolerance with half a serving of Nitraflex mixed with 6 oz of cold water. Days 2 and beyond: Depending on tolerance, mix 1 serving (1 scoop) of Nitraflex with 10 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 servings in a single 24-hour period. Do not take within five hours of bedtime.
Resources
[1] https://www.sciencedirect.com/science/article/pii/B9780124046306000531
[2]Bailey, S. J., Blackwell, J. R., Lord, T., Vanhatalo, A., Winyard, P. G., & Jones, A. M. (2015). L-citrulline supplementation improves O2 uptake kinetics and high-intensity exercise performance in humans. Journal of Applied Physiology, 119(4), 385-395.
[3]Pérez-Guisado, J., & Jakeman, P. M. (2010). Citrulline malate enhances athletic anaerobic performance and relieves muscle soreness. The Journal of Strength & Conditioning Research, 24(5), 1215-1222.
[4]https://www.sciencedirect.com/topics/pharmacology-toxicology-and-pharmaceutical-science/first-pass-effect
[5] Role of beta-alanine supplementation on muscle carnosine and exercise performance- MSSE 2010 42:6
[6] Stellingwerff T, Anwander H, Egger A, Buehler T, Kreis R, Decombaz J, et al. Effect of two beta-alanine dosing protocols on muscle carnosine synthesis and washout. Amino Acids. 2012;42(6):2461–72. doi: 10.1007/s00726-011-1054-4 and Harris RC, Jones GA, Kim HJ, Kim CK, Price KA, Wise JA. Changes in muscle carnosine of subjects with 4 weeks of supplementation with a controlled relase formulation of beta-alanine (CarnoSyn), and for 6 weeks post (Abstract) FASEB J. 2009;23:599.4.






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