GAT Sport NITRAFLEX Pre-Workout Review – Is It Safe To Use?

If you're looking for a thorough review on GAT Sport Nitraflex, we've got everything you need to know and more.

GAT Sport NITRAFLEX is a powerful formula known to be excellent for both physical performance and endurance.

To produce this Nitraflex review, we've spent a good amount of time testing the formula and have everything you need to know its ingredients, how good it is, if it's suitable for those with a medical condition, and more.

GAT NITRAFLEX is produced by GAT (German American Technologies), a company that has been around for over 20 years.

NITRAFLEX is one of their best known pre-workouts, and it's strong, with each dose containing 325 milligrams of caffeine, equivalent to under 3.5 cups of coffee.

While there has been confusion as to whether or not this pre-workout is a steroid, it isn't a steroid and is just a pre-workout supplement.

Steroids are man-made versions of chemicals, and this pre-workout supplement only contains natural ingredients and not free testosterone.

Even though NITRAFLEX can boost testosterone, it won't replace natural testosterone boosters or compete with a prohormone.

So, while it may benefit you when it comes to your exercise performance, it won't make a significant change in testosterone levels, making GAT NITRAFLEX suitable for both men and women.

Learn More - Is Pre-Workout A Steroid?








Overall Score


Our Expert Opinion On NITRAFLEX Pre-Workout

Here, we've got everything you need to know in our Nitraflex review.

We've had the opportunity to both taste and compare this pre-workout to other pre-workout supplements to ensure that this GAT Nitraflex review is thorough and accurate. 

1. Flavor

When it comes to the different GAT NITRAFLEX flavors, I was pleasantly surprised to see that they had quite a long list of flavors - making it less likely to get bored of the same one.

As a bonus, they also taste pretty good.

Here's a list of the flavors available:

  • Blue Raspberry
  • Pina Colada
  • Fruit Punch
  • Grape
  • Green Apple
  • Black Cherry
  • Watermelon
  • Patriot Blast
  • Lemon Tea
  • Beach Blast
  • Blood Orange
  • Blackberry Lemonade
  • Strawberry Mango
  • Guava Dragonfruit

I had the chance to experience the GAT NITRAFLEX taste of the Blue Raspberry and Fruit Punch.

They both tasted sweet, but the Blue Raspberry was slightly tangier. It also wasn't too strong or overpowering. The Fruit Punch had flavors of cherry, strawberry, and citrus all mixed together well.

When it comes to the mixing, GAT NITRAFLEX dissolved quickly in a shaker, so you don't have to worry about clumps. I also tried mixing it with a glass of cold water, and it worked well.

Learn More - What Causes To Pre-Workouts Clumping?

2. Performance Increase

I have to admit that GAT NTIRAFLEX definitely gave me a good performance increase. I've been able to wreck my gains week after week, and I do feel noticeably more powerful.

With this pre-workout, I was able to lift heavier weights and do more reps in comparison to when I consumed other pre-workouts.

I also felt that it worked great for blood flow and provided me with better muscle pumps.

3. Pump

The pump that I got from GAT NITRAFLEX was solid, but it didn't come close to the other pre-workouts that have blends with nitric oxide.

Those pre-workouts are meant to be a nitric oxide booster and will provide you with those vein-popping pumps - something that GAT NITRAFLEX doesn't quite provide.

That being said, I did still get a good pump and was able to still get a great workout in 20-30 minutes after consumption.

NITRAFLEX Pre-Workout Key Compounds

4. Focus

When it came to mental focus, my GAT Nitraflex review is that it provided me with a good amount of focus. I was fully focused on my reps and was hardly distracted by other gymgoers.

Perhaps the only thing that distracted me when I first took this pre-workout was the itchiness and tingly feeling that I got from the beta-alanine.

Over regular use, however, the itchiness and tingly feeling dissipated.

Learn More - Too Much Pre-Workout (Is It Bad?)

5. Energy

To boost energy, GAT NITRAFLEX comes with a good amount of caffeine (325mg, to be exact), and it sure does provide some great energy throughout the workout.

Even though I've got a high tolerance for caffeine, I have to say that this particular pre-workout provides me with huge energy boosts and is one of the strongest and most effective pre-workouts out there.

What's great about the energy build is not only the fact that it does increase blood flow but also the fact that it's gradual and long-lasting.

6. Side Effects

When I first started consuming this pre-workout, I did get a bit of beta-alanine itch along with a tingly feeling. As time went on, however, the itch and tingly feeling became significantly better.

While I didn't get the jitters, this is a strong pre-workout with a good amount of caffeine, so you'll want to make sure you're easing into it if you're caffeine sensitive.

Learn More - How To Get Rid Of Pre-Workout Itch?

7. Post-Workout

I didn't experience any crash when consuming this pre-workout. It also hardly affected my sleep, and I found that it left me feeling pretty good throughout the day.

If you're sensitive to caffeine, however, you might find this pre-workout a tad strong due to the caffeine content, and it's recommended that you consume half a serving instead of the full scoop to see how it makes you feel.

8. Cost & Availability

In comparison to the other pre-workouts out there, this particular one comes with the best price. It's around $30 and will provide you with about 30 servings - a pretty good deal.

While you can purchase NITRAFLEX on both Amazon and GNC, quite a few of its flavors are currently sold out on both platforms. 








Overall Score



  • Great overall blend that comes with a testosterone booster.
  • Inexpensive in comparison to some of the other pre-workouts out there.
  • Gives great energy, endurance, and strength.
  • Has a wide array of flavors to choose from.


  • It consists of a proprietary blend, so you may not know the exact amount of ingredients within NITRAFLEX.
  • Comes with a high amount of caffeine, so not suitable for caffeine-sensitive individuals.

NITRAFLEX Pre-Workout Formula (Ingredients Explained)

NITRAFLEX Pre-Workout Supplement Facts

When it comes to NITRAFLEX, it comes with a proprietary blend with the ingredients listed below.

GAT mentions that this is the most scientifically advanced NITRAFLEX formula to date, and this new blend can help with muscle growth and improve blood flow.

As part of the GAT Nitraflex review, here are some of the science-backed ingredients to highlight in this updated formula:

Patented Nitrosigine

Patented Nitrosigine helps to boost energy while promoting blood flow.


More Citrulline, which results in increasing nitric oxide levels to enhance the pump.


There is a high dose of beta-alanine, and clinical research states that beta-alanine helps with preventing fatigue in muscles.[1]


A high amount of caffeine. More so than most pre-workouts available. NITRAFLEX contains 325mg of caffeine anhydrous when the caffeine content is usually between 150 and 350mg.

Learn More - How Much Caffeine In Pre-Workout?

Elemental Boron

More Elemental Boron is a testosterone-boosting ingredient that increases testosterone levels naturally.

Amino Acids

Amino acids can help with recovery and reducing muscle fatigue.[2

An example of an amino acid in the blend includes Theanine as well as the amino acid Citrulline. The synergistic effect of amino acids shows they are good fat burners.

No Artificial colors

NITRAFLEX previously had complaints in regards to the artificial colors and dyes within its formula.

However, taking note of customer comments, NITRAFLEX has now completely removed both artificial dyes and colors from the formula. 

Stabilized Arginine Silicate

Stabilized Arginine Silicate benefits recovery, muscle pump, bone health, and cognitive function.


L-Theanine helps with better mental focus and increased cognitive performance.

Full NITRAFLEX ingredients list for this new formula:

  • Niacin - 25 mg
  • Sodium – 82 mg
  • Calcium - 35mg
  • Vasoactive Arginase-Regulating NO Precursor Complex - 3700mg consists of
  • L-Citrulline
  • Inositol - Stabilized Arginine Silicate
  • Resveratrol
  • Pterostilbene
  • Acute Energy, Focus, Intensity, Neuromodulating, Endurance Complex - 2621mg consists of
  • Beta-Alanine
  • L-Tyrosine
  • Caffeine Anhydrous (325mg)
  • Dimethylaminoethanol (DMAE) Bitartrate
  • L-Theanine
  • Rauwolfia Vomitoria Root Extract
  • OTHER INGREDIENTS: Malic Acid, Natural and Artificial Flavors, Silicon Dioxide, Citric Acid, Sucralose, Natural Sweetener Blend.

Who Should Consider GAT Sport NITRAFLEX?

Having taken GAT Sport NITRAFLEX, I feel that this formula is great for both beginners and advanced athletes looking to increase their natural testosterone levels and want an all-rounded formula for healthy persons that's great for their exercise program.

It's good for beginners as it comes with a decent amount of caffeine and has plenty of ingredients that are particularly good for focus and endurance.

For hard-training athletes, the testosterone-enhancing ingredient can help with those that have hit a training plateau.

Since this formula is also creatine free, it's also ideal for pre-contest prep and lean muscle physique.

If you're on a budget, you'll also want to consider GAT Sport NITRAFLEX, as it's relatively affordable.

Who Should Avoid NITRAFLEX Pre-Workout?

If you're sensitive to caffeine, it's best not to consume NITRAFLEX as it comes with a good amount of caffeine, and you may experience rapid heartbeat.

The high amount of caffeine also makes this not a suitable product for those with psychiatric or epileptic disorders along with those with thyroid disease.

If you do want to try this proprietary blend, however, start with a smaller scoop.

If you have low blood pressure, it's possible that the nitric oxide booster within NITRAFLEX may also lower your blood pressure and cause temporary dizziness, so that's something to consider.

While generally safe, the free testosterone booster within NITRAFLEX may cause a range of side effects, from body hair growth to other reproductive harm.

If you're trying to have a baby, it's best to avoid the blend, as it may cause birth defects and other issues.

If you're not a fan of the tingly feeling, you'll also want to avoid NITRAFLEX, as it comes with a decent amount of beta-alanine that can cause tingling in the body.

While there are no harmful effects associated with this tingling sensation, and it will not affect your health status, some individuals may not be a fan of it.  

Of course, we always advise that those who are taking prescription or non-prescription medication speak with their doctor before trying any new supplement.

Learn More - Can Pre-Workout Affect Birth Control?

How Does NITRAFLEX Compare Vs Other Pre-Workouts

GAT Sport NITRAFLEX Vs C4 Pre-Workout

When it comes to caffeine, GAT Sport NITRAFLEX has a higher caffeine content in comparison to C4, so it's ideal if you're looking for something with a higher caffeine boost.

In addition, GAT also seems to give more of a pump than C4, and C4 also doesn't contain testosterone boosters compared to GAT Sport NITRAFLEX, which can boost natural testosterone levels. 

With C4, however, they're a bit more transparent with the ingredients that they've got, so you won't feel as left in the dark.

It also comes with a good amount of flavors and will provide you with a good buzz during your workout; its formula can get clumpy, however, and doesn't mix as well as NITRAFLEX.

Related Article - Cellucor C4 Pre-Workout Review

GAT Sport NITRAFLEX Vs Total War Pre-Workout

Both Total War and GAT Sport NITRAFLEX are great, especially if you're looking for endurance and focus.

With Total War, however, it's definitely up there with the performance aspect and will provide you with great energy.

Both formulas also don't contain any artificial flavors, which is always a nice bonus.

Like GAT Sport NITRAFLEX, Total War also comes in a wide array of flavors but is chunkier when you're mixing the formula.

It's also not creatine free like GAT Sport NITRAFLEX, and is more expensive.

Ingredients between the two formulas are relatively similar, but Total War isn't known to be a testosterone booster.

It also contains other ingredients, such as juniper extract and green tea extract.

Related Article - Total War Pre-Workout Review

Frequent NITRAFLEX Pre-Workout Questions

Does Nitraflex pre-workout have testosterone?

NITRAFLEX doesn't have testosterone, but it comes with ingredients and other stimulants that are a testosterone booster.  

Is Gat Nitraflex banned?

No, NITRAFLEX doesn't come with banned substances. It's just a workout stimulant containing products that aid your overall workout.

Will Nitraflex pre-workout show up on a drug test?

No, NITRAFLEX does not test positive in a drug test, so you can use it in sporting events and competitions with ease.

Learn More - Does Pre-Workout Show Up On Drug Test?

Does Nitraflex pre-workout have creatine?

No, NITRAFLEX does not contain creatine to avoid water retention, making it great for individuals that want to consume it for bodybuilding competitions and the like.

Final Verdict

As seen from this Nitraflex review, NITRAFLEX is a great all-around formula that's perfect for both beginners and advanced athletes alike.

Not only is it excellent for workouts, but it may also boost testosterone. In addition, it also comes with a good amount of ingredients, from beta-alanine to amino acids and more.

We recommend this instead!

Transparent Labs BULK Pre-Workout







Overall Score



  • Cleanest and best tasting formula
  • Sustained energy and pump for workouts
  • Clinically dosed time-tested ingredients 
  • No artificial flavors or sweeteners 


  • Slower delivery time due to high demand




Last Updated on February 21, 2023