There’s a long list of pre-workout products available so we decided to take aim at one of the most popular pre-workout supplements in our 4 Gauge review. We’ll take a closer look at what effects you can expect, the ingredients, safety & price.

Pre-workout supplements are designed to help you get the most out of every session. Whether that’s lifting weights, cardio, or team sports; a high-quality pre-workout can provide a number of benefits.

Choosing the right pre-workout for you will depend heavily on your goals. When cutting-edge ingredients are available via an accessible supplement, athletes and everyday people can find the energy, drive, and motivation to get the best from their specific workout.

After reviewing numerous supplements, 4 Gauge is definitely one of the most impressive we’ve come across. Throughout the entire test process, it scored highly time and time again, showing itself to be one of the pack leaders of the pre-workout world.

When most settle on one aspect of improving a workout, 4 Gauge tries to hit them all.
Not only does this 4 Gauge promise energy, but it’s sure users will feel:

  • Improved mood and motivation
  • Increased focus alongside energy
  • Reduced muscle soreness
  • Heightened stamina
  • Improved hydration
  • No jitters
  • Impressive muscle pumps

4 Gauge focuses on; “Delivering the most effective, explosive and focused workout experience possible.” They also claim that their supplement is the strongest-working and also the safest pre-workout on the market.

A range of clean, all-natural ingredients only helps support the supplement’s supposedly premium status. If the contents of the bottle aren’t impressive enough, the bottle itself is a real eye-catcher and is unlike anything we’ve seen – we’re huge fans of the packaging.

However, we have to reign in the love for the branding, we can’t just base this 4 Gauge review off looks. Instead, we must take a look at the ingredients and their effectiveness, what you can expect to get out of 4 Gauge and whether it’s worth the money.

Benefits of 4 Gauge

4 Gauge’s main objective is to supply the tools you need to get the most out of your sessions.

A complete, full-spectrum support compound should allow you to gain an advantage in almost every physical and mental aspect.

Key 4 Gauge benefits:

  • Enhanced energy
  • Improved focus
  • Extended stamina
  • Impressive muscle pumps

Enhanced energy

4 Gauge should provide its users with a strong sense of increased energy. Looking at the ingredient profile, this may manifest itself in both physical performance and improved mental focus.

Improved focus

The inability to engage your mind during your workouts can make exercise hard. It can also make working out unproductive and setting new personal bests feel impossible.

Extended stamina

Heightened endurance should allow for increases in overall workout volume. Simply put – if you can do more, you may gain more.

The likes of Creatine and Caffeine have been shown to directly influence output and endurance and 4 Gauge have nailed the dosages here.

Impressive muscle pumps

Most bodybuilders look to achieve muscle pumps in almost every session. When this occurs muscles will look noticeably bigger during and shortly after a session.

Is 4 Gauge safe?

As previously mentioned, 4 Gauge features a completely natural formula. Each of its suggested serving sizes have been created in accordance with scientific guidelines, which means they should not pose an unnecessary risk or dangerous side effects.

4 Gauge is also free from proprietary blends, meaning there are no hidden fillers/ingredients and you know exactly how much of each ingredient you’re getting.

4 Gauge ingredients

4 Gauge contains eight natural ingredients. Having taken a closer look at the ingredients, we believe that each ingredient and their effects are suited to a pre-workout supplement. The are no superfluous ingredients in this mix.

Not only did we find the right ingredients in this compound, the servings of each product were spot on too. Every single element should help the user achieve a specific pre-workout goal, without risking negative side-effects.

Caffeine Anhydrous

Caffeine is a commonly used pre-workout ingredient, which some athletes also use on its own. Studies have shown that it can improve physical output AND hold cognitive benefits too.

According to current research, Caffeine can improve the perception of alertness and wakefulness, which may help gym-goers stay engaged [1].

The International Society of Sports Nutrition claims the Caffeine Anhydrous form found in 4 Gauge is superior to others, such as that contained in coffee or tea [2].


Commonly consumed within tea, L-Theanine has been shown to positively influence brain function. It can significantly increase activity in the alpha frequency band, which helps to relax the mind, without making users feel drowsy [3] [4].

However, L-Theanine’s place in a pre-workout comes to light when combined with Caffeine. Often dubbed ‘Smart Caffeine’, this blend allows users to experience a smooth, clean, and controlled energy boost [5] [6]. It should keep gym goers firmly focused on the task at hand for a bigger, better workout [7].


Creatine is one of the most heavily researched supplements on the planet. Time and time again is has been shown to improve physical performance, as well as holding certain cognitive benefits.

According to the ISSN, Creatine works as an ergonomic aid that allows athletes to perform more work, while being proven to improve power and strength in responsive athletes [8]. Other studies also confirm creatine can help reduce fatigue [9].

This intelligent addition should improve your workout results by reducing fatigue, facilitating better water intake, and enhancing focus.

L-Citrulline DL-Malate

Once absorbed by the body, L-Citrulline boosts blood nitric oxide (NO) levels. This dilates the blood vessels to allow for better flow, which should result in increased muscle pumps. Not only that, but NO is also a potential modulator of muscle energy metabolism, alongside mitochondrial respiration.

According to researchers, L-Citrulline can enhance athletic performance while also relieving muscle soreness [10]. This should allow 4 Gauge users to train harder for longer, recover sooner and feel less exhausted after their workout [11].

How to take it

This may be the section that explains itself but it wouldn’t be a 4 Gauge review if we didn’t cover it. A pre-workout is specifically designed to be taken close to your workout. A good manufacturer will have developed a formula that works synergistically to provide support from the first rep. For optimum results, it is always recommended to follow the product guidelines. Following manufacturer suggestions should allow for correct, planned supplementation. By taking the recommended amount at the proposed times, you can a create an ideal scenario for each ingredient to take effect as planned. Failure to consume a pre-workout as suggested may alter its potency, power, and effectiveness. 4 Gauge, for example, advises supplementation 30-minutes before exercise. This should allow enough time for its formula to be absorbed by the body and start to work while training begins. To create the best possible environment for experiencing 4 Gauge we suggest you:
  • Mix two level scoops of 4 Gauge formula in 300 – 350 ml / 10 – 12 fl. Oz of water
  • Drink the mixture 20 – 30 minutes before exercise
  • Safely increase the serving size up to four scoops if you build up a tolerance
As this supplement includes caffeine, we do not advise you take it close to sleep. It is also recommended that you reduce your overall caffeine intake throughout the remainder of the day.

How much does it cost?

A complete container of 4 Gauge contains 280 grams of powder, which amounts to 20 servings. However, if you are looking to supplement with 4 Gauge for an ongoing period, there are multi-buy options that may save you a lot of money. For those wishing to purchase two shotgun shells, free US and UK shipping is included in the price. Additionally, when three containers are bought together, a fourth is also added to the order at no extra cost.


It was clear from the start that this is a clean cut, intelligent and natural formula. We saw nothing but essential ingredients, included for a specific purpose and in optimal serving sizes. We discovered no filler compounds, nor did we find any undisclosed blends.

Due to the transparency and natural profile of 4 Gauge, we were able to say this pre-workout should be safe to use.
Yet we cannot give a fair 4 Gauge review without commenting on cost. It’s evident that 4 Gauge clearly sits in the premium product price range, especially when compared to lower-tier, cheaper alternatives.

However, we do believe 4 Gauge is worth the extra money. While we understand it may be too expensive for some, we feel 4 Gauge’s price tag fairly reflects its premium quality. In terms of value for money, we always recommend a reputable, premium product over lower-quality alternatives.


  • Multi-buy offers and free shipping deals
  • Increases blood flow
  • Improved stamina
  • Uses ‘Smart Caffeine’ to improve energy and focus
  • Reduces muscle soreness
  • Optimal levels of caffeine
  • Better muscle pumps
  • 100% natural, clinically-served formula
  • Elevates mood and motivation
  • No proprietary blends – transparent ingredient profile


  • Can only buy direct
  • Premium price
  • One flavour option

If you enjoyed this 4 Gauge review be sure to check out our Instant Knockout Review.


[1]Cappelletti S, Piacentino D, Sani G, Aromatario M. Caffeine: cognitive and physical performance enhancer or psychoactive drug?. Curr Neuropharmacol. 2015;13(1):71-88.

[2]Goldstein E, Ziegenfuss T, Kalman D et al. International society of sports nutrition position stand: caffeine and performance. J Int Soc Sports Nutr. 2010;7(1):5.

[3]Nobre, A. C., Rao, A., & Owen, G. N. (2018). L-theanine, a natural constituent in tea, and its effect on mental state. Asia Pacific Journal of Clinical Nutrition,17.

[4]White DJ, de Klerk S, Woods W, Gondalia S, Noonan C, Scholey AB. Nutrients. 2016;8(1):53. Published 2016 Jan 19.

[5]Owen, G. N., Parnell, H., De Bruin, E. A., & Rycroft, J. A. (2008). The combined effects of L-theanine and caffeine on cognitive performance and mood. Nutritional Neuroscience, 11(4), 193–198.

[6]Haskell, C. F., Kennedy, D. O., Milne, A. L., Wesnes, K. A., & Scholey, A. B. (2008). The effects of l-theanine, caffeine and their combination on cognition and mood. Biological Psychology, 77(2), 113–122.

[7]Kahathuduwa, C. N., Dhanasekara, C. S., Chin, S., Davis, T., Weerasinghe, V. S., Dassanayake, T. L., & Binks, M. (2018). l -Theanine and caffeine improve target-specific attention to visual stimuli by decreasing mind wandering: a human functional magnetic resonance imaging study. Nutrition Research, 49, 67–78.

[8]Kreider, R. B., Kalman, D. S., Antonio, J., Ziegenfuss, T. N., Wildman, R., Collins, R., . . . Lopez, H. L. (2017). International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. Journal of the International Society of Sports Nutrition, 14(1).

[9]Ferreira R, Fernandes W, Barros F, Ribeiro W. Effects of 10 Weeks Swimming and Creatine Supplementation on Blood Lactate and Muscle Fatigue of Mice. Athens Journal of Sports. 2016;3(3):197-205. doi:10.30958/ajspo.3-3-3

[10]Suzuki T, Morita M, Kobayashi Y, Kamimura A. Oral L-citrulline supplementation enhances cycling time trial performance in healthy trained men: Double-blind randomized placebo-controlled 2-way crossover study. J Int Soc Sports Nutr. 2016;13:6. Published 2016 Feb 19.