Testofuel is, without a doubt, one of the most widely-used testosterone boosters in the world. It was launched a few years ago, but it has remained trendy since the first day it hit the shelves. This is enough to set it apart from most other testosterone boosters out there, most of which gain serious traction in their first few months and then swiftly disappear when people realize they’re bogus. TestoFuel has definitely stood the test of time!

So why has TestoFuel remained so popular among weightlifters and bodybuilders?

What does it claim to offer, and how does it work?

TestoFuel is principally designed for use by young bodybuilders, fighters, physique competitors, and athletes of just about every kind.According to the website, users of TestoFuel can expect the following core benefits within just a few weeks of starting to use the product:

Enhanced muscle growth

Faster recovery after training

A rapid increase in strength

Significantly increased libido

Greater energy levels

Improved mood

Obviously, these benefits all result from one central promise of TestoFuel – a real increase in free serum testosterone levels.

If TestoFuel can really bring about a significant rise in test levels, then all of these benefits will follow (and many more besides).

So, does TestoFuel really work?

How does it compare to other products today making the same claims?

Find out by reading our full TestoFuel review below. We’ll put the formula under our microscopes and see whether it really stands a chance of doing any of the things it says it can. We’ll talk about the side effects and health risks too. Have you used TestoFuel? How did you find it? Let us know in the comments!


Let’s take a look under the hood and see if TestoFuel backs up all its big talk:

TestoFuel ingredients

Right away, we can tell that TestoFuel is a top-quality testosterone booster.

We see an excellent range of top-quality ingredients.
There’s a good diversity of ingredients here; TestoFuel clearly targets several different pathways through which you can elevate serum testosterone levels. This is ideal because few men can accurately identify the leading cause of low testosterone – it’s always best to just hit them all at once!

The quality of the ingredients in TestoFuel is also excellent.

There’s no waste in the TestoFuel formula. No fillers, no over-hyped garbage, and nothing dangerous. Every TestoFuel ingredient has a place, and they all really affect testosterone levels, sleep quality, and libido.

There are some problems with TestoFuel, however. We think some well-proven ingredients could be included to improve this supplement. For example, there’s no natural aromatase inhibitor. We also believe the doses could be more generous in places.

Overall, we see why TestoFuel has remained so popular among bodybuilders all these years!

Let’s go through the main strengths of this stack, as well as the principal weaknesses.


Solid dose of D-Aspartic Acid

Good diversity of ingredients

Extra focus on libido and energy

There’s a lot that we like about this testosterone booster. Undoubtedly, the most significant strength is the good diversity of ingredients.

D-Aspartic Acid (D-AA)?

First of all, do we have an excellent serving of D-Aspartic Acid (D-AA)?

D-AA is probably the most reliable natural testosterone booster we know of. It works by stimulating the release of Luteinizing Hormone (LH) from the pituitary gland. When the Leydig cells in your testes sense the presence of LH, they begin to create and release large quantities of testosterone. You can think of LH as the “trigger” for your body’s testosterone release system, and D-AA is the finger that pulls that trigger!

This is no doubt why D-AAA supplementation has been shown to have such a massive effect on serum LH and testosterone levels (ref).

We think every single testosterone booster needs to contain plenty of D-AA. It is so cheap and readily available – and so damn effective – that leaving it out is never a good idea!

Each daily serving of TestoFuel contains 2,300mg of D-AA. This is all we need to stimulate LH’s release, which causes testosterone release from the testes. It is sufficient to see benefits without causing side effects; a serious selling point!

D-Aspartic Acid TestoFuel ingredients

As D-Aspartic Acid is taking care of actually stimulating testosterone release from the testes, other ingredients in TestoFuel are preventing the decline in testosterone levels we usually see from intensive weight training.

Zinc, Magnesium, and Vitamin D

We’re, of course, talking about the Zinc, Magnesium, and Vitamin D servings.

It might sound unbelievable, but we are convinced that deficiencies in zinc, magnesium, and Vitamin D are the primary causes of low testosterone in young men today. Most of us work indoors, train indoors, and relax indoors. We eat a diet sparse in minerals like zinc and magnesium (unless your diet is all tree nuts, shellfish, and broccoli).

Zinc has a profound effect on testosterone levels. Studies have shown that zinc supplementation is able to prevent a decline in testosterone levels in men subjected to intensive weight training. As the researchers in this study state: “Findings of our study demonstrate that exhaustion exercise led to significant inhibition of both thyroid hormones and testosterone concentrations, but that 4-week zinc supplementation prevented this inhibition in wrestlers. In conclusion, physiological doses of zinc administration may benefit performance.”

Magnesium is absolutely vital for the proper synthesis of testosterone in humans. Lower magnesium levels correlate closely with lower testosterone levels. Conversely, higher magnesium levels usually correlate nicely with higher testosterone levels. This relationship has been observed in sedentary and trained men, and it seems particularly pronounced in older men (ref).

Like both magnesium and zinc, serum Vitamin D levels are very closely correlated with free and total testosterone levels in humans (ref). Indeed, Vitamin D acts much more like a hormone in the body than a vitamin – it modulates various bodily functions, such as bone formation, calcium absorption, and testosterone regulation. And like zinc and magnesium, most people in the West are deficient in Vitamin D (especially in the winter months).

TestoFuel provides good doses of these essential nutrients. Most guys will benefit greatly from supplementing with these nutrients on a regular basis, especially. If they are constantly doing heavy weight training?

Ginseng Root

Is it also worth mentioning the 100mg of Asian Red Ginseng?

Ginseng is a very hit-and-miss testosterone booster. Different types of ginseng seem to have different effects; some seem to increase testosterone reliably, and others seem to do nothing at all.

It also seems quite inconsistent across populations; some people get a lot from it, and others seem to be non-responders.

However, robust clinical trials have shown that Asian red ginseng supplementation significantly increases free serum testosterone (as well as other male sex hormones). As you’ll see if you read the cited study, Asian Red Ginseng supplementation seems to reduce prolactin, which is the hormone that tells the body to produce breast milk. If you’re a guy, you definitely want this reduced!

That TestoFuel provides some Asian red Ginseng and not another, less effective form of ginseng is a significant selling point. That said, we do think it could use more than 100mg. This brings us to our problems with TestoFuel!


Low doses in key areas

No aromatase inhibitor

Fenugreek boosts libido but not testosterone!

Despite the many strengths listed above, TestoFuel is not perfect. It is not market-leading; we think there are better testosterone boosters. The thing that most clearly separates it from the best, in our opinion, is the lack of an aromatase inhibitor.

Top quality testosterone boosters today often contain a natural aromatase inhibitor.

A handful of substances can reduce the action of the enzyme aromatase, which is responsible for the conversion of testosterone into estrogen. Your body likes to balance testosterone and estrogen – it doesn’t care about your gains, just about longevity and survival! By inhibiting aromatase, you slow down the testosterone conversion rate into estrogen, which means higher serum testosterone levels!

Many bodybuilders use synthetic, pharmaceutical-grade aromatase inhibitors. These come with serious health risks; most pro bodybuilders know this only too well, but they don’t care. While natural aromatase inhibitors lack the potency of synthetic drugs, they also lack the side effects!

You will see some cutting-edge products which contain known aromatase inhibitors. The most common one used today is luteolin. We think this has the most solid scientific backing of all the supposed aromatase inhibitors.

Luteolin structure

Another notable absence from TestoFuel is anything to bind to Sex Hormone Binding Globulin.

Allow us to explain.

Sex Hormone Binding Globulin is a protein that binds to estrogen, DHT, and testosterone. Once it has bound to these proteins, they cannot act on their respective receptors. This means that testosterone cannot exert any kind of androgenic effect on the body.

To put that another way, SHBG renders testosterone useless.

That is why some cutting-edge testosterone boosters today provide substances that preferentially bind to SHBG. In doing so, they ‘take the bullet’ for testosterone, as it were. The end result is more free testosterone and, by extension, increased strength, faster muscle gains, etc.

If you try to ramp up your body’s production of testosterone, it’s essential that you also try to minimize aromatase and SHBG activity. Both of these will render excess testosterone effectively useless.

The fact that TestoFuel lacks these increasingly commonplace ingredients is a major issue.

It is no doubt a result of the fact that TestoFuel was formulated a few years ago. It doesn’t make TestFuel a bad testosterone booster – it’s just that some products have a more rounded, comprehensive formula.

Fenugreek TestoFuel ingredients

The final weakness of TestoFuel’s formula is the use of Fenugreek.

You’ll find a lot of stuff written about Fenugreek online. 90% of the time, it’s all positive. There are lots of fitness and supplement review sites out there that claim that Fenugreek is a potent testosterone booster. They say that it can raise free testosterone levels in men in just a few weeks. You’ll often see them cite this study to back up these claims.

However, there’s a big problem here: that study found Fenugreek to be INEFFECTIVE FOR RAISING TESTOSTERONE!

Instead, the researchers found that Fenugreek increased sex drive. Without. Influencing hormonal parameters in any way?

The researchers in that study used what is supposedly the highest quality fenugreek extract available. They gave participants good doses, too – 600mg per day! Yet there was still no effect on testosterone levels?

The fact that it increases libido is not a bad thing. If you’re hammering the iron five days per week, then chances are you’re feeling pretty exhausted by the time you get home. If you work a full-time job and have kids, then sex might be the last thing on your mind when you hit the sack. So having something to boost your libido is definitely a positive?

It’s just that it doesn’t increase sex drive by elevating testosterone levels, which is what most people using TestoFuel want.


So we’ve been through the formula and highlighted all the main strengths and weaknesses.

But you might not really care about any of this.

At this point, some of you might be thinking: JUST TELL ME WHAT TESTFUEL DOES!

In practical terms, we think most people using TestoFuel will experience the following benefits, provided they take the supplement consistently for a couple of weeks at least:

A notable increase in lean muscle mass

Faster recovery post-training

Greater energy levels in the gym

Increased libido

Greater confidence and improved mood

If these are the kinds of things you’re looking for from a testosterone booster, then TestoFuel might be perfect for you.

>>>> Learn more from the TestoFuel website. <<<<


Independent user reviews are always of limited value when trying to judge a supplement. We have no idea whether or not the people behind the reviews are genuine; we don’t know if they used the product correctly; we don’t know what their diet was like; we don’t know what else they were using.

Basically, we don’t know a lot. There’s no guarantee that they were particularly scientific in their approach!

But, one thing user testimonials give us is an insight into how the product is supposed to work, what kind of benefits you can expect, and so on. An abundance of genuine reviews can sometimes tell us whether or not it is a total scam too, which is always useful.



Getting the most out of TestoFuel requires you to use it properly.

By that, we mean using it consistently, on a daily basis, for several weeks.

That is how the ingredients in TestoFuel work best; they take time to build up in your system, and it takes a little longer after that for their effects to become noticeable.

Many people will fail to get any good results from this or any other testosterone booster simply because they’re lazy, don’t take it every day, or give it enough of a chance. There is a reason why the money-back guarantee is 90 days and not 14 days!

So when should you take TestoFuel?

Pre-workout or post-workout? In the morning or at night?

To get the best possible results, we recommend splitting your daily dose of TestoFuel into four equal parts and consuming them at regular intervals throughout the day.

For example, your daily dosing schedule might look like this:

The first serving is at 8 am with breakfast.

Second serving at 1 pm with lunch

Third serving at 6 pm before hitting the gym

Final serving at 9 pm post training

We recommend doing this for a number of reasons.

For one thing, it keeps you nice and topped up with active testosterone-boosting agents all day long. Most of the ingredients in TestoFuel take a little while to really impact your test levels, but some do get to work right away. Splitting up your dose prevents peaks and troughs in testosterone levels.

Another big consideration is the side effects. If you take the total dose at once, any side effects you might experience will be more pronounced than if you’d split your daily serving into smaller doses. Of course, side effects will be rare, and when they do occur, they are usually pretty mild. But it’s definitely worth taking the extra precaution of starting small and making sure you aren’t allergic or overly sensitive to anything before taking a full day’s dose all in one go!


By far and away, the most important consideration for many of you is the safety of TestoFuel.

You probably came to this review looking for the answer to some straightforward questions:

Will TestoFuel cause side effects?

What about long-term safety?

In our opinion, TestoFuel is highly unlikely to cause side effects in most users.

It is made of all-natural ingredients which have been thoroughly tested in clinical trials and are both effective and safe for human consumption.

In studies carried out on the ingredients used in TestoFuel, there is never any mention of serious side effects. The only adverse effects we have ever encountered regarding these ingredients are things like digestive discomfort. Even then, the occurrence is quite rare.

So long as you use TestoFuel as directed, and you don’t have any allergies or pre-existing conditions which make it unsuitable, you should be fine.

That said, you must read the label carefully and ensure that you are not allergic or highly sensitive to any of the ingredients in TestoFuel. It is rare for someone to be adversely affected by the ingredients in this testosterone booster, but is it possible?

You need to talk to your doctor and ensure that TestoFuel will not interact badly with any medications you’re currently on, any other supplements you might be using, and so on.


You MUST be aware of the following things while reading our reviews:

We are not doctors

This isn’t medical advice.

We are simply presenting our opinion based on our own research and experience.

Your unique medical history is relevant to safety considerations. We don’t know you or your medical history. We are just presenting our opinion based on the average user, our experience, and our research. Just because TestoFuel looks safe for 99% of users doesn’t mean it will definitely be safe for you. Do you need to do your research carefully and get proper advice from your family physician before continuing?


TestoFuel is made and distributed by Roar Ambition. Is this a UK-based bodybuilding supplement brand?

Over the years, these guys have earned themselves a reputation as serious, trustworthy supplement manufacturers. They specialize in sports-specific supplements, focusing on bodybuilding and strength training products.

TestoFuel was their first product. It was launched several years ago and remains one of the most popular testosterone boosters in the UK today. The same goes for the rest of the world, actually!


In our opinion, TestoFuel is definitely worth the money.

The potential results from using this potent, reliable, and seemingly very safe testosterone booster are well worth the very reasonable $65.00/month supply price tag.

That works out at about €45, or around £40.

So for each day that you are using TestoFuel – even when you take the most expensive purchase option – it works out at around $2.09 per day for a 31-day month?

Of course, this gets an awful lot cheaper when you buy multiple boxes at once. If you opt for the Ultimate Mass Gainer Package – where you get four boxes plus a couple of eBooks – the price comes down to $48.75 per box.

That works out at about $1.50 per daily serving.

For the potential gains you’re looking at, that is an ABSOLUTE BARGAIN!

Buying the 4-box option actually makes TestoFuel significantly cheaper than most other testosterone boosters on the market today. It certainly makes it cheaper than the current market leaders.


Is it also worth considering the money-back guarantee?

TestoFuel comes backed by a 90-day money-back guarantee. Users who are not satisfied with the product can return it within 90 days and receive a full refund (terms and conditions apply).

That is how confident Roar Ambition is about its product.

This really makes the ~$48 per month price tag seem even more reasonable!



TestoFuel is made and sold by Roar Ambition. These guys are very reputable supplement manufacturers. They’ve been around for a good few years now. Unlike many other new starters in bodybuilding, they’ve managed to stick around! They are based in the UK, although their products are manufactured and shipped worldwide.


The ingredients in TestoFuel begin to work right away. The D-Aspartic Acid, for instance, will immediately begin to elevate testosterone production in the testes. You should see a rapid improvement in libido from the Fenugreek too. But you will not see optimal results for at least 30 days; most of the studies showing massive increases in testosterone from the substances in TestoFuel saw the most significant changes between 28 and 90 days.


Yes, absolutely. There is nothing remotely illegal about this testosterone booster. It is not an anabolic steroid. It contains no prohormones, controlled substances, or steroid analogs. TestoFuel is made in the UK by a UK-based company.


TestoFuel can only be bought directly from the manufacturer. We really respect this way of doing things. It guarantees quality control; third parties can ship faulty or damaged products, be late, or their customer service can be awful. There’s also the risk of over-charging. TestoFuel avoids all these problems by selling exclusively through its online store. You can pay in several different currencies, and they ship worldwide. So it doesn’t matter if you’re looking to buy TestoFuel in the UK, in Australia, or in the US – you use the same website to buy!


Yes, TestoFuel is absolutely PERFECT for bodybuilders! It is a sports-specific testosterone booster. This means it has been formulated with young, natural, drug-free bodybuilders in mind. The ingredients have been selected and dosed under the assumption that users want to maximize muscle growth, increase energy, and support an active sex life while undergoing heavy weight training. If you’re a bodybuilder, this is probably the ideal testosterone booster!


No. TestoFuel is a natural testosterone booster. It is absolutely no replacement for doctor-prescribed HRT or TRT. If your doctor has decided that you need hormone replacement therapy – or, more specifically, testosterone replacement therapy, then use the pharmaceutical-grade drugs he or she gives you. TestoFuel is not an HRT drug!


No. There are no banned substances in TestoFuel at all. The product only contains natural ingredients that could reasonably be found in the human diet. There are no synthetic prohormones, no stimulants, and nothing that could potentially even become a controlled substance. TestoFuel will not fail a drug test, and it is future-proof.


The lack of an aromatase inhibitor in TestoFuel might worry some of you. It might seem like TestoFuel is liable to cause gyno. However, we think this is extremely unlikely. TestoFuel increases the body’s natural production of testosterone. This can lead to increased conversion into estrogen, but it is important to remember that TestoFuel is not. An exogenous hormone – it isn’t steroids. Your body will not have a huge load of extra testosterone to convert to estrogen rapidly. Instead, it triggers a steady, gradual increase in testosterone production in the testes. There’s no sudden change in the body, so there’s no extreme reaction either?

If you do experience gyno while using TestoFuel, stop using it immediately and talk to a doctor. They’ll test your estrogen levels and see what can be done to keep your hormones in a healthy balance.


It should be theoretically safe for women to use TestoFuel. However, we don’t think women should use TestoFuel if they really want to see optimal results. We believe the results they get with TestoFuel are going to be significantly less impressive than those achieved by men who use this supplement.

TestoFuel is not designed for females. It has been specifically designed to take advantage of the testosterone production system in men. The way women produce testosterone is entirely different from how men produce this hormone. Some ingredients in TestoFuel have also been shown to decrease prolactin in men. These ingredients have not been thoroughly tested in women, but playing around with prolactin is not a good idea if you plan on breastfeeding any time soon.

Since the ingredients in TestoFuel are relatively untested in women, we advise serious caution!


TestoFuel is an excellent natural testosterone booster. There’s a reason that TestoFuel has remained one of the most popular and talked-about bodybuilding supplements; it really works! TestoFuel formula is comprised entirely of effective, proven natural ingredients. Together, they tackle multiple problems – vitamin and mineral deficiencies, low LH production, and more. The end result is a stack capable of reliably and quickly raising your free serum testosterone levels, which means faster muscle gains, faster recovery, and increased strength. Adding Fenugreek and Oyster Extract means that your hard training won’t put a dent in your bedroom performance – a lovely bonus!