4 Gauge


Last modified: November 5, 2022

  • Value for money
  • Ingredients
  • Effectiveness
  • Testimonials

4 Gauge Overview

4 Gauge pre workout is a new supplement released by Roar Ambition who are the makers of other well-known supplements, such as Instant Knockout and TestoFuel.

1 round of explosive and focused pre-workout 4 Gauge. 6 weeks (approx) supply of the safest and strongest pre-workout on the market.

Calling upon decades of research, journals and clinical studies, 4 Gauge is considered to be the most potent, natural supplement for both physical and mental performance allowing you to work harder than ever before.

It’s a game-changing 4-in-1 pre workout formula that enhances every aspect of what makes a workout great; raw strength, strong focus, long-lasting energy, and intense muscle pumps.

It’s perfect for anyone who wants to see faster results in the gym, perform better at their sport – or just feel incredible while exercising.

Buy our #1 pre-workout now

Do you need help choosing the right supplement for you, call us today on 0800 080 7887 and one of our team will be happy to help!

  • £25.00 $34.50

    x1 4 GAUGE SHELL

  • £50.00 $69.00


  • £75.00 $103.50


What does 4 Gauge do?

4 Gauge Pre workout Supplement

Explosive Power/ Increased Energy

Form a stronger connection between your body and brain to lift more weight, and build more muscle.

Extended Stamina

Train for longer and with improved endurance and focus, helping you to be stronger for longer and be more productive during your workouts.

Concentrate more on your session, fade out the rest of the world and give 110% dedication to whatever you’re doing.

Incredible Muscle Pumps

Feel more blood pumping to your muscles when training. Gain muscle size and endurance, while looking thicker and tighter at the same time.

Supplement review overview

  • L-Theanine & Rhodiola Rosea for improved focus and reduced mental fatigue, helping you to push harder in the gym.
  • L-Citruline DL Malate & Red Beetroot for more blood pumps and better muscle recovery.
  • Creatine provides you with a boost of energy for your workouts. Caffeine also gives you an extra boost of energy.
  • L-Carnitine reduces fatigue and helps recovery from muscle damage.
  • Only one flavor is available.
  • Premium pricing.

Manufacturer Description

Calling upon decades of research, journals and clinical studies, 4 Gauge is considered to be the most potent, natural supplement for both physical and mental performance allowing you to work harder than ever before. It’s a game-changing 4-in-1 pre-workout formula that enhances every aspect of what makes a workout great; raw strength, strong focus, long-lasting energy, and intense muscle pumps.


  • Great blood pump during workouts.
  • Good quality ingredients.
  • Trusted company.
  • Suitable for vegans and vegetarians.
  • Only one flavour.
  • Premium product, so premium pricing.
  • Only available through their website.

Consumer Testimonials

Michelle, UK

“What can I say, 4 Gauge blew me away. I felt so energized and powerful, but not shaky and itchy, it made me go a few extra sets in the squat rack that’s for sure!

It’s helped me with both HIIT training and weight training and even powered me through a couple of gym classes.

I’m not normally one to write reviews online but ladies, this pre workout rocks and is now an essential part of my stack.”

Ryan, US

“Since I have been using only 4 gauge as my pre-workout I have definitely made mass gains on all lifting and physical sports I do. It gives me a totally smooth and energizing power shortly after I take it.

I lost 30 lb and I have cut my body fat in half and finally can be confident at the beach with no shirt on.

I’ve been taking it for 5 months now. Thanks to 4 Gauge I have more confidence and more power doing bodybuilding.”

Video Testimonials



Well, we could say that you’ll love it, but then what would you expect us to say?

But are you sure you really don’t like them? First of all, how long ago was it that you tried a pre-workout powder? Over the past few years, the taste and texture have been greatly improved. The taste isn’t as strong, and it leaves your gag reflex alone.

For many brand names, the days of closing your eyes and chugging it down are long gone.


Good question! For best results, we recommend taking a week off from it every 6-8 weeks. That way it will help to keep your body more sensitive to it.

Do this during the time you are giving your body a little bit of a break every couple of months


This can vary from person to person. Some guys start their workout 15 minutes after taking 4 Gauge, while others wait 30-45 minutes. See how it works for you, and then send us an e-mail letting us know.


Our goal is to keep things simple and offer you the best.

We spent months testing flavor combinations. We found that our unique fruit blast flavor was the best tasting by far. It beat many of the leading brands on the market. It tastes so great, which is why we only offer one flavor.


Yes, one serving of 4 Gauge is the equivalent of 2 scoops… The real question you should be asking, is ‘Can I take 2 servings at the same time?’

And the answer is still yes.

We’ve designed 4 Gauge for those who feel that they want more of the product can safely do so. However, we first advise that you try the standard 2 scoop serving and assessing your tolerance, before taking it to the next level.


Results can vary, obviously, but on average this Smart Caffeine can last between 2 – 4 hours.

Try 4 Gauge to see how long it lasts for you. Experiment with it. See if you can go for 5 hours.


What's in 4 Gauge

top 10 supplement reviews caffeine anhydrous

What’s in 4 Gauge?

Caffeine Anhydrous – 150 mg

Caffeine is easily the world’s most recognized and popular stimulant, being present in coffee, tea, colas, and energy drinks. Its main source is coffee beans (and tea leaves). Anhydrous means it has no water so it provides “pure hit” of caffeine. Studies have shown that caffeine increases fat oxidation, so basically instead of your body solely using glycogen for energy, it’ll also use fat stores so you can last longer.

[7. A.E. Jeukendrup & R. Randell, Fat burners: nutrition supplements that increase fat metabolism, Obesity reviews, Vol. 12, issue 10].

Caffeine also increases the production of heat and increases your concentration to help you focus on your workouts.

top 10 supplement reviews  L-TheanineL – Theanine – 200 mg

An important amino acid, L-Theanine elevates levels of dopamine and serotonin which control the brain’s reward and pleasure centers, apparently, L Theanine is anxiety relieving ingredient, that is in tea and green tea. Data suggests L-theanine combined with caffeine improves mental state and cognitive ability, which is just what you need in the gym!

top 10 supplement reviews  CreatineCreatine Monohydrate – 1000 mg

Creatine Monohydrate is always an excellent workout supplement, it increases the amount of water in muscles to promote protein synthesis. However, rather than being used to make gains it has been included in this supplement because creatine in low doses improves muscle regeneration and lower muscle fatigue, keeping you fresher and ready to get some more gains!

top 10 supplement reviews  WatermelonL – Citrulline DL Malate – 6000 mg

This amino acid has been extracted from watermelons, with the aim of your muscles more of that good blood pump. It works by dilating your blood vessels allowing more blood to pass through. Apart from the obvious benefit of bigger, vein-filled muscles it also allows your muscles to have more strength. The optimal dosage for L Citrulline Malate is 6-8 g for people who exercise meaning that this pre-workout allows you to get the optimal level for this nutrient for better workouts.

top 10 supplement reviews  Beetroot ExtractBeetroot Extract – 300 mg

This antioxidant supplement is a brilliant source of vitamins and nutrients. Usually, used by athletes and bodybuilders to increase their workout performance. It increases the amount of plasma nitrate which works to have a similar effect as Citrulline Malate by improving blood flow in the body.

top 10 supplement reviews  Rhodiola RoseaRhodiola Rosea – 100 mg

This supplement has been included in 4 Gauge as it is said to help you stay focused and improve your mood essentially getting you in the zone for a workout session. It is traditional Chinese medicine and has had studies on it that support the claims of it helping fatigue and psychological well-being.

Acetyl – L – Carnitine – 500 mg

top 10 supplement reviews  Carnitine

Another amino acid, L- Carnitine helps you in two ways, firstly it provides you with energy that helps you to feel energized both physically and mentally for your workouts. The second way Carnitine helps you is by reducing the muscle damage on your body after a workout, allowing for a quicker muscle repair time.  Additionally, is within the optimal level for users who exercise.

Coconut water powder – 300 mg

top 10 supplement reviews Coconut powder

Coconut water is known to be a massive electrolyte booster, it probably even gives Powerade a run for its money. It hydrates, provides and even gives you potassium which helps lower your blood pressure.

Our Verdict

We have reviewed this supplement and believe it to be the best pre-workout available on the market. Furthermore, It comes with essential ingredients that you want in a pre-workout as well as a good range of additional ingredients that come with additional benefits such as improved blood flow. Additionally, these ingredients have been chosen to work well with each other and boost the effectiveness of the other ingredients in this supplement. On a final point, we can say from personal supplement usage that the combination of caffeine and L-theanine works brilliantly, providing you with the energy and the calmness/ focus needed to blast through your workout.

Can 4 Gauge be improved?

Firstly, we think more could be done for cognitive improvement factors in the product since it specifically lists laser focus as one of the key benefits of the product we do think it’s odd that there could be more cognitive improving/ calming ingredients I.e. Rhodiola Rosea. Additionally, the length of the effects felt from the ingredients within this pre-workout can be improved. So that the blood pump and the calming aspects from the supplement last longer after workouts.

Is it just a hyped supplement or the real deal?

Though we do think there are areas for improvement in the cognitive function ingredients and the longevity of the ingredients. We do still think this is a powerful pre-workout supplements with a good focus on blood flow improving ingredients to allow for higher power output and blood pump when working out. Additionally, for what you get it is great value for money, especially considering that Transparent Labs pre-workout is priced £35 which is £10 more than 4 Gauge. Still not sure 4 gauge is the one for you? Take a look at our top 10 pre-workout supplements for alternatives.

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