TestoFuel Review – The best testosterone booster?

Author: Greatest Physiques

June 22nd 2021

TestoFuel is Roar Ambition’s premium testosterone booster supplement. With its scientifically-backed 100% natural nutrient profile; it helps you build lean muscle mass or lose stubborn belly fat – achieving the dream body you’ve always wanted. How does it work and is it effective?

We find out in this TestoFuel review.

TestoFuel Pros and Cons



  • Optimally dosed ingredients
  • 100% natural nutrient profile
  • No side effects
  • Over 1 million bottles sold
  • Helps to boost T
  • Elevates energy and performance
  • Works to improve muscle mass
  • No proprietary blends – made in FDA approved facilities


  • Premium price – the best products never come cheap, and you get what you pay for.
  • Can only buy from the official site

What is TestoFuel?

TestoFuel is a natural testosterone booster designed to help users raise levels of T naturally, pack on more muscle, boost confidence and achieve optimal health. These T-boosting pills claim to hold every ingredient needed to raise your testosterone levels and keep it at peak levels, so you can build your dream physique and feel your best too.

Who makes TestoFuel?

TestoFuel is made by the experienced heads at Roar Ambition, a global,  leading supplement company founded in 2014.

These guys develop some of the most popular supplements on the market, from test boosters to fat burners, they know their stuff. You may have heard of them if you’ve used their famous fat burner Instant Knockout Cut.

We are fans of the products Roar Ambition brings to market. The company is committed to delivering high-grade, effective formulas and stay one step ahead in terms of nutritional research.


How does TestoFuel work?

TestoFuel tablets are packed with a blend of plant-based ingredients that work to improve the natural production of testosterone in your body. It should complement your regular training routine and healthy diet to help you reach optimal health and build a physique you can be proud of.

Each capsule works to deliver:

  • Enhanced muscle growth and recovery – with muscle building compounds like D-AA to help you pack on muscle and build a bigger physique
  • Better energy levels – using natural energy enhancers and mood lifters so you can power through workouts
  • Optimal health – ensuring you have normal levels of T flowing so you can perform and feel at your best
  •  Boosted libido – better T levels mean you can enjoy the sexual stamina you had when you were younger

What can you expect from TestoFuel?

The all-natural formula contains specific ingredients proven to make a positive difference to your testosterone levels, meaning you can:

  • Gain lean muscle mass – Fill your shirts out and be admired for your physique.
  • Get rid of belly fat – Lose your stubborn fat and reveal the 6-pack men and women want.
  • Feel happier than before – Increased self-confidence and value leads to better quality of life.
  • Raise your libido – Feel your sex drive go through the roof again.

 TestoFuel ingredients

What TestoFuel does better than anyone else is use the right ingredients, with the right doses, to optimize your T levels.

Keep reading our TestoFuel review to discover what’s inside and how the ingredients work.

1. Vitamin D3

Known as the sunshine vitamin, D3 is technically a hormone… and an important one too when it comes to stimulating androgen production.

The ‘sixth steroid hormone’ is one of the most extensively researched nutrients out there.

It’s been shown to improve everything from bone, muscle and vascular health, to mood, brain power and immune system efficiency, vitamin D3 really is one of the best supplements out there.

When it comes to testosterone, vitamin D3 has been found to have a direct influence. In one study, a daily dose of 3,332 IU resulted in over a 25% increase in androgen levels [1].

And another study found that older men with low vitamin D levels were much more likely to have lower free testosterone levels – as well as a significantly higher risk of bone problems [2].

2. D-Aspartic acid

This amino acid is used to synthesise new protein cells.

As a neurotransmitter, D-AA as it’s commonly known, has been shown to help boost muscle mass and power output, speed up fat loss – and most of all, increase testosterone levels.

It does this by triggering the release of the androgen precursor called luteinizing hormone. This hormone carries messages from the brain to the testes, essentially working like an alarm clock to wake up testosterone production.

The research is beyond conclusive.

For example, one study reported that in as little as 2 weeks, D-AA ramped up anabolic hormone levels by nearly 50% – and by a massive 60% in 12 weeks [3].

3. Oyster extract

What’s the first thing that comes to mind when you think about aphrodisiac foods? 

That’s right – oysters. For many years this food has been considered to be the absolute best libido-boosting tonic around.

The problem is though that not only are they hard to get hold of, oysters don’t always taste that great either. They are a pretty acquired taste – and for some, just not nice at all.

But that’s where oyster extract comes in. It’s the best natural source of zinc you’ll find – and as such, have been found to effectively treat low mood, brain health, obesity and hormone levels.

When it comes to optimizing androgens, zinc-rich supplements have been shown to elevate T levels even during exhaustive exercise – in both elite level cyclists [4] and football players too [5].

4. Fenugreek

So far, we’ve covered the ingredients that directly increase testosterone levels by stimulating production.

Fenugreek though, attacks your hormones from a different angle. This gives you a double-barrelled assault on your hormone levels.

That’s because this sweet and aromatic Mediterranean herb acts like a defensive wall against SHBG – a type of protein that swallows up testosterone and makes it unusable.

When 30 regular gym-goers were given 500 mg of fenugreek each day for 8 weeks, a number of significant benefits occurred [6].

  • A sharp increase in total and free testosterone
  • Muscle mass increased and fat decrased
  • Bench press and leg press strength improved

5. Ginseng

This mildly spicy, bitter herb has long been thought of as a libido enhancer as well as potent aphrodisiac. But it’s much more than that.

Ginseng boosts cognitive ability and brain power [7], meaning you can channel your energy into more productive gym workouts.

The result? More muscle, more strength.

Ginseng also plays a part in regulating your insulin sensitivity, meaning you’ll find it easier to curb your food craving and shred fat whilst on a weight cut.

But the real benefit here is the effect of ginseng on testosterone levels.

That’s because much like fenugreek, this Asian herb has the power to kick your luteinizing hormone into action – remember, this hormone is the one that slaps your testes into pumping out more testosterone.

And as an added extra, ginseng  has also been shown to have a direct action on androgen production too – ramping up both testosterone and its derivative hormone DHT in as little as a few weeks [8].

6. Zinc

We’ve already talked about the power of zinc when we introduced you to oyster extract. But it’s such a potent mineral that TestoFuel have added another 10 mg just to make sure your low androgen levels have no where to hide.

Men with low zinc levels are pretty much guaranteed to have low serum testosterone levels [9].

It really is that important!

This essential mineral stimulates testosterone directly by putting the brakes on aromatization – the process by which high levels of testosterone get converted to the female hormone estrogen [10].

So while other commanding TestoFuel nutrients work hard to up your androgen levels, zinc works even harder to make sure these sky high levels remain elevated.

7. Magnesium

Another essential mineral – magnesium – is responsible for managing hundreds of biological reactions in the body.

Magnesium is the chemical version of the traffic officer – guiding your enzymes to the right places in order to optimize health and performance.

From ensuring good sleep quality, to regulating your metabolic rate; magnesium is one of the most important minerals you’s want to find in a high-quality testosterone-boosting supplement like TestoFuel.

When it comes to boosting hormone levels, this chemical element is a fast-acting, dynamic and forceful mineral that has been shown to elevate testosterone in as little as 4 weeks [11].

8. Vitamin K2

There’s the brash and powerful potency of D-AA and there’s the strong and reliable sturdiness of vitamin D3 in TestoFuel.

Together, they form a full on assault on your low hormone levels.

But there’s also the silent confidence of nutrients such as vitamin K2 – a fat-soluble compound known as menaquinone. 

That’s because K2 supports vitamin D3 in its testosterone-boosting role, giving it a helping hand in ramping up your androgen levels.

Vitamin K2 has even been seen to lead to 70% increases in testosterone over less than 6 weeks too, when supplemented on its own [12].

While D3 might steal the limelight, K2 is definitely a formidable supporting player.

9. Vitamin B6

Last but not least, there’s B6 – a water-soluble vitamin known for its ability to regulate energy by controlling and supporting your metabolism.

Much like zinc, B6 hacks away at aromatization, helping you to keep hold of your newly acquired sky-high testosterone levels – by as much as 30% in some studies [13].

It also boost other androgens that support testosterone as well.

It’s a great all-rounded and helps to keep this fantastic supplement grounded and formidable.




Supplement Facts

Main Ingredients

  • Vitamin D3 – A hormone synthesized from sunlight, an optimal 5,000 IU dosage is proven to raise your testosterone production and boost sexual health.
  • D-Aspartic Acid – Shown to increase testosterone by 46% in 13 days, DAA supports optimal test levels while keeping estrogen low, in effective dosages over 2,000mg.
  • Fenugreek Seeds – This herb has been used for centuries, due to its ability to raise your libido and testosterone levels. It’s also shown to be effective from 50mg, making it one of the most efficient nutrients.

How To Take TestoFuel

TestoFuel comes with a suggested serving size of 4 capsules per day (with 30 servings per container).

This is the optimal dosage that keeps your body powered with the nutrients it needs – to increase testosterone production naturally.

Why Do You Need a Testosterone Booster?

As a man with high testosterone levels you ooze masculinity.

From your chiseled jaw and broad shoulders, to your muscular frame and unrelenting athleticism. Even your assertive, confident personality tells a story of a man that knows what he wants in life – and gets it too.

This naturally-occurring androgenic, anabolic hormone is what makes you a man – a strong and powerful man.

But it doesn’t last forever.

That’s because while your hormones can be sky high throughout your twenties, your testosterone levels begin to plummet as you reach thirty – by as much as 1-2% per year.

By the age of 45, as many as 40% of men have clinically low hormone levels – what’s known as hypogonadism.

And by 60 years old, that figure is well over 50%.

Why is low testosterone bad?

You enjoyed the benefits of high testosterone as a young man – the confidence, the lingering looks from the girls, and the endless hours of bedroom time with your partner.

But as low testosterone levels kick in you found a change in both your physical and mental abilities.

  • Increased risk of disease – you’re much more likely to suffer metabolic, vascular and cognitive illness.
  • Belly fat – your muscle mass is quickly replaced by unsightly fat stores around your abs and chest.
  • Loss of energy, libido and stamina – whether it’s in the gym or the bedroom, you’re endurance just isn’t what it used to be.
  • Low mood – combine a lack of energy with the frustrations of anxiety and depression and you’ll soon lose that spark and vigor.

But all is not lost – testosterone is a dynamic hormone. Work with it and you’ll soon get those levels back to what they were.

That’s where an effective testosterone booster will help you…



Benefits of TestoFuel

One overarching aim of TestoFuel is to improve testosterone levels, naturally. With that comes many health benefits, including:

Heightened muscle growth

Research suggest that testosterone is the missing link to muscle growth. That’s why TestoFuel is packed with natural ingredients including vitamin D, and D-AA that have evidenced to help your body release testosterone, increase the rate of protein synthesis and promote muscle growth.

Increased libido 

Testosterone is important for sex drive as well as sexual performance. TestoFuel contains ingredients like oyster extract which is thought to improve reproductive function and keep testosterone firing on all cylinders.

Better mood and motivation

TestoFuel may elevate your motivation levels with the addition of natural mood enhancers like Ginseng. This ancient herb has long been known for its cognitive boosting effects. It’s common knowledge that men with more testosterone feel more confident too. By boosting your motivation and mood, you’ll be more inclined to smash your workouts.

What do people say about TestoFuel?

TestoFuel is popular with thousands of men worldwide. It’s used by world-class bodybuilders and pro strength training athletes, with 4 times Mr. Universe and 5 times Mr. Olympia, Robby Robinson a big advocate too.

Because it’s so popular, it’s not hard to find a multitude of positive reviews. Many customers praise it for its ability to heighten their physique, with the formula helping to improve muscle growth and strength, mood and performance. Some users claim it’s been a key supplement to helping them feel their best and has helped push them emotionally and physically.


Is TestoFuel safe?

As TestoFuel is an all-natural testosterone booster, you won’t suffer from any side effects. This means, you’ll never be at risk from experiencing gynecomastia (man boobs) or other negatives associated with other products.

However, TestoFuel does contain oyster extract, so it’s worth mentioning; especially for those that are allergic to this nutrient (but not many are).


There’s no denying that TestoFuel comes with a bigger price tag than other test boosters available ($65 for 30 servings).

But adding more effective ingredients in optimal dosages raises the cost of production.

For this reason, it’s only natural for TestoFuel to be priced higher than other products that contain less effective nutrients in smaller dosages.


How to get the best out of TestoFuel

The creators advise taking this supplement every day to maximize results. They also claim supplementing with it for 2 months will help users feel the full benefits.

Follow our top tips to get the best out of this supplement:

  • Take consistently and give it time to get to work – 2 months should be the minimum
  • Use TestoFuel alongside a healthy diet and regular strength training routine
  • Take with your meals to increase ingredient absorption


Where to buy TestoFuel

One bottle of TestoFuel provides 120 capsules, which is enough to last you 30 days.

One bottle costs: $65 / £39 and is available from the official website.

Right now, the manufacturer’s are running a variety of bulk-buy deals to help you save money. For instance, when you purchase three boxes, you get 2 FREE and free worldwide deliver. If you decide this is the test booster for you, this could be a better value deal.


Editor’s Verdict on TestoFuel

That concludes our TestoFuel review! If you’re looking for a supplement to help you build lean muscle or lose belly fat – then TestoFuel is the best on the market.

However, this isn’t a cheaper option that contains lower dosages of less effective nutrients. But it’s worth cutting down on junk food for.

Ultimately, if you want an all-natural test booster that keeps you safe from man boobs, you’ll benefit from Roar Ambition’s premium supplement.

To Buy or Learn More Details, Visit The Official Site:


  1. Pilz, S et al. Effect of vitamin D supplementation on testosterone levels in men. Horm Metab Res. 2011; 43(3): 223-225
  2. Bischoff-Ferrari, HA et al. Additive benefit of higher testosterone levels and vitamin D plus calcium supplementation in regard to fall risk reduction among older men and women. Osteoporos. 2008; 19(9): 1307-14
  3. D’Aniello, S et al. D-aspartate, a key element for the improvement of sperm quality. Adv. Sex. Med. 2012; 2: 47–53
  4. Neek, SL et al. Effect of zinc and selenium supplementation on serum testosterone and plasma lactate in cyclists after an exhaustive exercise bout. Biol Trace Elem  Res. 2011; 144(1-3): 454-62
  5. Brilla, LR et al. Effects of a novel zinc-magnesium formulation on hormones and strength. J Exerc Physiol. 2000; 3(4): 26-36
  6. Wilborn, C et al. Effects of a purported aromatase and 5α-reductase inhibitor on hormone profiles in college-age men. Int J Sport Nutr Exerc Metab. 2010; 20(6): 457-65
  7. Hye-Bin, Y et al. Effects of Korean red ginseng on cognitive and motor function: a double-blind, randomized, placebo-controlled trial. J Ginseng Res. 2012; 36(2): 190-197
  8. Salvati, G et al. Effects of panax ginseng C.A. Meyer saponins on male fertility. Panminerva Med. 1996; 38(4): 249-54
  9. Prasad, AS et al. Zinc status and serum testosterone levels of healthy adults. 1996; 12(5): 344-8
  10. Netter, A et al. Effect of zinc administration on plasma testosterone, dihydrotestosterone, and sperm count. Arch Androl. 1981; 7(1): 69-73
  11. Cinar, V. Effects of magnesium supplementation on testosterone levels of athletes and sedentary subjects at rest and after exhaustion. Biol Trace Elem Res. 2011; 140: 18–23
  12. Ito, A et al. Menaquinone-4 enhances testosterone production in rats and testis-derived tumor cells. Lipids Health Dis. 2011; 10: 158
  13. Symes, EK et l. Increased target tissue uptake of, and sensitivity to, testosterone in the vitamin B6 deficient rat. J Steroid Biochem. 1984; 20(5): 1089-93

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Been taking Testofuel for 4 weeks and feel great! Libido is high and made some gains, what more can I ask for? Bit pricey though so 4 star…but ultimately worth it.

Not only does this product work for building muscle, it also works for libido and a general feeling of wellbeing. Awesome for us 40 somethings.

somewehre alng the line i jst lost my mojo. im known as spunk to my friends cos’ im usually upbeat bt was jst feeling low on juice. found out i was low on vit d3 from the docs so went looking for supps and found this. now i feel alpha again and i want to be called testofunkie!