4 Gauge vs Metabolic Nutrition ESP Pre Workout [One Is Brilliant!]

4 Gauge vs Metabolic Nutrition ESP Pre Workout

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4 Gauge vs Metabolic Nutrition ESP Pre Workout

A battle of the pre-workouts today, but which of our Metabolic Nutrition ESP Pre Workout comparison is going to come out on top?

They are both made by reputable companies but only one can win. What we are looking for is a product that can give us the following:

  • Increased energy
  • Enhanced focus
  • Greater muscle pumps
  • Big gains!

Anything less than this and we won’t be impressed.

So, which has come closest to giving us what we want? Let’s start by getting to know them a little better.

4 Gauge vs Metabolic Nutrition ESP Pre Workout: Who Makes These Products?

Roar Ambition4 Gauge Pre Workout Supplement

Here we have the UK based company behind 4 Gauge. They make everything by the book in facilities approved by the GMP and to FDA approval.

With a lot of 4 Gauge before and after profiles appearing online, it is clear that so many people are happy with what it does for them.

We like that they offer a money back guarantee with their products and that they review and amend their ingredient profiles regularly. This ensures the customer is always getting the most up to date version.

If you are into endorsements then Roar Ambition have some impressive names. UFC fighter Diego Sanchez puts his to their fat burner, Instant Knockout. Then there is former Mr. Universe Robby Robinson who puts his name to their T Booster TestoFuel.

Metabolic NutritionMetabolic Nutrition ESP Pre Workout Review

Our next company was founded by Dr. Cohen and have over 3 decades of experience. They employ over 60 people so they operate to a high level.

Metabolic Nutrition is another company that makes their products to GMP approval and spend a lot of time dedicated to quality according to their site.

There is also a 30-day money back guarantee with their products. Purchasing should always be risk-free in our eyes.

With free standard shipping for orders over $99 and a wide range of products on their site, they have everything from fat burners to post-workout products.

Because of the high amount of stimulants in this product, it is not recommended that you exceed one scoop every 24 hours.

According to the company themselves, this product gives more energy, drive and focus which is exactly what we are after.

Let’s see who can keep their promises.

4 Gauge vs Metabolic Nutrition ESP Pre Workout Ingredients

This is where we can really get to know the products.

The early signs aren’t great for Metabolic Nutrition ESP Pre Workout. They have a lot of their ingredients included in a proprietary blend. This means we don’t get to see the individual dosage. This makes it hard to tell if the ingredients are dosed sensibly or not.

Still, there is a lot to go on.

4 Gauge


A great start from 4 Gauge, this is certainly an ingredient we hope to see in our pre-workout supplements.

It is reliable in its results and known for enhancing blood flow. It turns into nitric oxide in the kidneys which widens the blood vessels. This is so important for the big pumps and gains – they are the name of the game here after all.

Commonly found in watermelons, it converts into Arginine in the body. Although this is useful for Creatine synthesis, 4 Gauge also gives you a good amount of that as well.

Examine.com say that anything between 6 – 8 g is optimal. 4 Gauge has included an optimal 6 g making this a very good start for them.

Creatine Monohydrate

Another very good ingredient.

It is a common inclusion for pre-workouts, but also good post workout. It has a lot to offer when it comes to lean muscle mass. With the support of numerous studies, it is a reliable, safe and effective ingredient.

Creatine aids both physical and muscular performance. When it comes to post workout, it is its ability to aid recovery that makes it so good. It’s never too early to get the recovery process going.

Actually, Creatine can benefit the body at any time. One study shows that supplementing Creatine during arm flexor strength training was found to lead to greater increases in arm flexor muscle strength, upper arm muscle area, and fat-free mass than strength training alone.

The 1 g in 4 Gauge is a really useful dosage.

Caffeine Anhydrous

An important ingredient in so many supplements, as long as it is dosed sensibly.

It is really versatile which makes it so useful. This is why fat burners can appreciate its metabolism boosting ability and nootropics can benefit from increased focus and alertness.

Of course, it is the energy boost that makes it so good for a pre-workout. By giving you a reliable energy increase it is the type of ingredient you want in your system when you walk into the gym. It can really get you ready to go from the start.

The anhydrous element basically means it is a powdered version that is easily absorbed, and fast acting.

Of course, a stimulant is only as good as the dosage. The sensible, safe and effective 150 mg will give you enough of a boost, without risking side effects.


An ingredient that can help to make sure your mind is sharp.

The better pre workouts will give you ingredients like Rhodiola. It is a Scandinavian herb and is often credited with being able to raise spirits. You need to get into the right mental shape if you want to get to the next level of your workout at the gym.

Examine.com advise that Rhodiola is popular for its adaptogenic properties (reducing fatigue and exhaustion in prolonged stressful situations).

The 100 mg is a good amount.


This ingredient really shows just how well 4 Gauge understands the importance of making a good all round formula.

As a lot of pre-workouts contain stimulants, you need ingredients that counter their negative side. L-Theanine is one such ingredient that can help you to remain calm, even when there is Caffeine in your system.

This doesn’t mean that Caffeine won’t be useful, it brings out the best in it. Derived from Green Tea leaves, Examine.com says that it helps promote relaxation without drowsiness, making it synergistic with Caffeine.

The Caffeine content in 4 Gauge is still sensible but this ingredient ensures that you are having a positive experience even if your tolerance to Caffeine isn’t very high.

Everyone has different reactions to Caffeine making the 200 mg a very useful dosage.

Acetyl L-Carnitine

Another useful one.

This is because L-Carnitine can increase energy levels but also boost your body’s fat burning. Any ingredient that can help you to squeeze a bit more out of every session, and get shredded, is one you should be grateful for.

WebMD says that Acetyl L-Carnitine helps the body to produce energy. They also tell us that it is important for heart and brain function, muscle movement, and many other body processes.

The 500 mg is another optimal dosage.

Red Beet

More blood flow is always going to be very welcome in a pre-workout.

Red Beet will get your plasma nitrate levels on the rise which will make your workout is even better. Known for increasing stamina levels and being a safe and natural ingredient.

All this means is the big muscle pumps and the gains will be easier to achieve.

The 300 mg is an optimal dosage.

Coconut Water Powder

Any pre-workout worth using will get you working up more of a sweat than usual.

The problem with that is it can mean that your body is depleted of the nutrients it needs to still be healthy. When you feel like this, you are more susceptible to injury.

Coconut Water Powder is good because it contains a load of electrolytes that are key to ensuring your body gets everything it needs.

Staying hydrated is vital and this is the type of ingredient that can help for that when your body is upping the intensity.

The 300 mg is another useful dosage.

Metabolic Nutrition ESP Pre Workout

Vitamin B3

Their first ingredient is often known as Niacin.

You do see it in pre-workouts and it has some uses. It can help you to break down carbs and then use them for energy. It can get you shredded as you’ll be burning fat as well as using it for your workout.

It’s not the most essential ingredient though and when we take on excess amounts, it passes through your urine. This makes it seem less desirable. Examine.com also tells us that in order for it to be effective you need around a gram of it.

The dosage of 20 mg falls well below.

Vitamin B6

Another ingredient that can be used to create more energy.

It converts glucose into fuel meaning it can help you to get more out of your gym time. Similar to the previous ingredient, which you will find with a lot of the B-vitamins.

It’s not the most impressive ingredient and the 4.23 mg included isn’t huge but you don’t need a lot for it to do the above.

Vitamin B12

Yet more help with energy metabolism.

Still, B12 isn’t something our bodies can create naturally. Also, the fact that some of the most prominent sources are meat, dairy, and fish, means it can be good for vegetarians and vegans to supplement it.

Sometimes linked with mental functioning, although WebMD files this trait under their possibly ineffective for section.

Linked to fighting fatigue, but the same source advises that there is insufficient evidence for this.

The 500 mcg is an ok dosage for supplements.

A lot of the following ingredients are in the proprietary blend.


A common ingredient for a pre-workout, but not necessarily a good one.

WebMD say that it is a nonessential amino acid that is produced by the body. For us though, it is the side effects that put us off.

Beta-Alanine can cause paresthesia. This isn’t the worst side effect by any stretch but it is a tingling sensation of the skin. Pretty annoying when you are trying to concentrate in the gym, also, it’s not a great look!

At least it usually passes within a couple of hours.

What is also bad when it comes to Beta-Alanine is the fact that it doesn’t get a lot of proper support. It is sometimes touted as being able to battle fatigue, but this is often disputed.

It only takes around 800 mg to cause paresthesia for some people. Because we do not have the dosage we can’t say for sure if this will be the case. More often than not, supplements include a lot more than this, it is quite common for paresthesia to be a side effect.


With names like this on their label, it can often look a bit overwhelming. Still, this is basically just Theobromine.

It is actually a mild stimulant that has a similar effect to Caffeine. Some studies will argue against its effectiveness though. The ones that support it often say that it can increase focus, energy and also mood. Similar to Caffeine basically.

What you will see is that it can widen the airways, This means you can get more air into your system. Because of this, you have more energy in the gym.

Although it is often said to be milder than regular Caffeine, the effects are thought to be longer lasting. There is a study that showed how Theobromine didn’t have any beneficial effects when it came to cognition and mood when compared to a placebo and Caffeine though.

With no dosage, it is hard to say if it will work. Also, as with any stimulant, we can’t say how safe it will be.

N-Acetyl L-Tyrosine

An ingredient that is certainly more common in pre-workouts.

It is useful as well, especially because of the stimulants in this product. N-Acetyl L-Tyrosine keeps you calm and in control during stressful situations. This is also the case for when your body consumes stimulants.

It has also been found to boost focus which is a big plus point for any pre-workout.

The blend will once again prevent us from knowing how effective it can be, but it is good to see it on the label.

Choline Bitartrate

Not a great nutrient but it can increase attention span and memory.

Choline Bitartrate is a common ingredient for a nootropic. Still, there are many great nutrients lacking for a pre-workout so far, so really it is just taking up space that could be better used.

Examine.com advises it is mostly used for either its cognitive boosting properties or as a liver health agent. They also say it is found in high amounts in egg yolks.

Calcium Gluconate

The gluconate form actually has the lowest concentration so it isn’t going to be as effective as other forms.

Even still, Calcium is an ingredient that you are probably not deficient in anyway. Common sources are easy to get into your diet. It can boost memory function and there is one study that says it can be of use.

This shows that when it was tested on a group compared to another that did not take it during resistance training, it boosted free T levels.

For a pre-workout though, that’s about as good as it gets.

Not an impressive ingredient and the dosage of 200 mg could be put to better use.

Magnesium Gluconate

Another strange ingredient to include.

It can act as a muscle relaxant so if when you consider the stimulants in this product, it might be good.

WebMD actually advise that foods high in fiber are usually high in Magnesium. So it is possible that you are covered in this area.

Really, it’s another 200 mg that we could put into something else.

Potassium Gluconate

A better ingredient, especially when it comes to bodybuilding and workouts.

Low levels of potassium can bring on fatigue as well as weak muscles – that’s the opposite of what we want! It can even restore glycogen levels post workout. By boosting muscle contractions and maintaining your blood pressure at the desired level, it is a good inclusion.

Since when you sweat you lose a lot of it, keeping it topped up is a clever idea.

The 200 mg included is going to be useful.


Another ingredient that we often lose when we sweat so restoring levels through a supplement is a good idea.

As with 4 Gauges inclusion of Coconut Water Powder, hydration is so vital. Muscles get damaged when you work out and sodium actually helps the membranes in the body by maintaining them.

Sodium can help you to absorb other ingredients making it able to bring out the best in a supplement, of course, this would be even better if their ingredients were as well.

The sort of ingredient you need after a good workout which is why you will find it in a lot of post workouts as well.

The 30 mg isn’t the biggest dosage in the world, but it will still be useful.

4 Gauge vs Metabolic Nutrition ESP Pre Workout Side Effects

The easy place to start is with 4 Gauge.

Their mix of safe and effective ingredients at optimal dosages makes it a product that should be well tolerated.

The Caffeine content in Metabolic Nutrition ESP Pre Workout is what is most concerning. At 500 mg it is around 4 cups of Coffee. This is a lot all in one go.

Side effects from too much Caffeine include nausea, jitters, headaches, rapid heartbeat, insomnia and more.

Also, Beta-Alanine can cause paresthesia. This tingling sensation does pass within a couple of hours usually, but it is still distracting.

4 Gauge vs Metabolic Nutrition ESP Pre Workout Pros and Cons

4 Gauge Pros

  • 100% natural ingredients
  • Increased energy levels
  • Enhanced performance when in the gym
  • No side effects
  • Zero artificial sweeteners
  • Low in calories
  • Great taste
  • Made in the USA
  • No energy crash

Metabolic Nutrition ESP Pre Workout Pros

  • Some useful ingredients

4 Gauge Cons

  • No choice when it comes to flavors
  • Only available from the manufacturer

Metabolic Nutrition ESP Pre Workout Cons

  • Too much Caffeine
  • Proprietary blend
  • Ineffective ingredients

4 Gauge vs Metabolic Nutrition ESP Pre Workout Conclusion

Winner: 4 Gauge

4 Gauge Review - best pre-workout - get 1 free bottle

Read our full 4 Gauge Review

Buy 4 Gauge from www.4gauge.com

(Clean Lean Machine Tip: Buy 3 bottles and get a 4th bottle FREE whilst the offer is still available!)

With so many of the top ingredients for a pre-workout, 4 Gauge is as good a product as we have seen.

Of course, this makes it hard to beat but the competition wasn’t as close as we had hoped today. 4 Gauge has a combination of the best ingredients, safe and effective dosages and it just damn works!

The evidence is there on the label but with so many people finding the results to be so good, it is no surprise that it is becoming a major player in the market.

They choose not to just overload you on stimulants and give you ingredients that will really get you the big pumps and gains that you need.

A very impressive product.

Buy 4 Gauge from www.4gauge.com

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