The search to find the best muscle-building supplement is a popular one. With so many options claiming to get you the results you want, it's hard to make the right decision.

One of the best options we have found is TestoFuel, a muscle-building supplement designed for men, but also works for women. We completed in-depth research on this supplement to find out if it's worth your time and money. Read below to see what we found out.

What Is TestoFuel?

TestoFuel was founded in 2014 by Roar Ambition and to this day is still one of the leading testosterone boosters. Roar ambitions produces sports performance supplements using local suppliers and high-class facilities in the USA and UK.

This supplement was designed to naturally increase your testosterone levels, considered the 'missing link' needed to build muscle. They claim that this exhaustively researched, all-natural supplement can create real muscle growth, increase strength, reduce body fat, improve your libido, and boost self-esteem. The supplement is also an anabolic support complex, meaning it has ingredients that help with the growth and repair of muscle tissue. 

Whether you are suffering from the health effects of low testosterone levels in the body, or yo just want a boost in your performance, this product can be a very useful choice compared to synthetic testosterone options. 

Ingredients and Science Behind TestoFuel

You might be wondering if TestoFuel capsules are actually worth all the hype they get. We’ve taken a look at the ingredients, research and science behind this supplement to see how they impact the natural production and release of the testosterone levels in your body. The main ingredients included in TestoFuel include:

Vitamin D3 4000IU

This nutrient is produced when the body comes in contact with UV rays from the sun. But, most people are not getting enough sunlight, so a supplement is a must. Numerous clinical trials have proved that vitamin D can increase testosterone levels [1].

Vitamin K2 18mcg

This vitamin is often found in foods with higher fat contents, so supplementation is the way to go. It complements vitamin D3, resulting in more testosterone release [2]. It has also been found to directly increase testosterone production on its own [3].

Vitamin B6 5mg

Regular supplementation of this vitamin has been found to stimulate androgens, like testosterone [4]. It simultaneously reduces the build-up of testosterone's arch-nemesis, estrogen [5]. Additionally, it improves the health of your skin, eyes, hair, and liver.

Magnesium 200 mg

This mineral works as a co-factor in the body, meaning it regulates many enzymatic reactions including those that regulate the brain, bones, and heart. Its multitude of benefits includes supported physical endurance, increased metabolism, enhanced recovery from workouts, boosted sleep quality, and improved lean muscle mass. It has even been found to increase testosterone levels as well [6].

Zinc 10mg

This mineral boosts luteinizing hormone levels in the brain which tells your body to produce more Testosterone [7]. Not only does it help with androgen receptors efficiency to produce more testosteron, but it also decreases the process where testosterone converts to Estrogen, known as aromatization [8].

D-Aspartic Acid (DAA) 2300mg

DAA is an important amino acid that regulates hormone release, especially luteinizing hormone which tells your body to produce more testosterone. It helps with growth hormone production and muscle mass [9]. 

Asian Red Panax Ginseng 100mg

This herb has been known to improve mood, cognitive ability, and the immune system. It has recently been found to directly influence testosterone levels as well [10]. Additionally, ginseng increases nitric acid levels in your blood allowing for greater muscle pumps and it improves insulin sensitivity which can help you to lose body fat and stay lean [11].

Fenugreek (seed) 100mg

Found in Mediterranean climates, this herb contains zinc, magnesium, and selenium which decreases sex hormone-binding globulin. This hormone decreases 'free' testosterone in the bloodstream. Studies have shown even a small amount of this herb can increase both total and free testosterone levels [12].

Oyster Extract 100mg

Research has shown that zinc-rich foods can elevate testosterone levels. As oysters are the best source of Zinc, many studies have found oyster extract improves reproductive function and increases testosterone production. It also inhibits aromatization, the process that converts testosterone to estrogen [13].

TestoFuel Benefits

This 100% natural, highly effective testosterone boosting and muscle building supplement has several benefits, which include:

Increased testosterone

Recent scientific discovery proves a connection between certain nutrients and boosted testosterone production. Through 'compound' nutrition, TestoFuel ensures your body has the nutrients it needs for maximum testosterone production.

Muscle growth and repair

Testosterone stimulates protein synthesis and causes muscle growth by binding to androgen receptors in the muscle cells. It also enhances the natural production of other hormones to prevent catabolism, or muscle tissue breakdown. They may also be effective in improving the recovery process and reducing muscle soreness after a workout. 

Increased libido

Many of the ingredients that are found in this supplement are well-known for their ability to boost your sex drive, allowing you to enjoy more sexual desire and be more satisfied in the bedroom. 

Increased metabolism

Higher testosterone levels also means higher metabolism rates. Having a higher metabolism means your body can burn more calories. A higher metabolism does not only keep the fat off your body, but it also increases your energy and immune system strength.

Improved mood and boosted self-esteem

Testosterone is known to improve mood, reduce stress and help you stay motivated. Welcome more motivation that can help you reach your exercise goals and make a pleasant weight loss experience. With a stronger, slimmer body and a boosted mood, you will experience a heightened level of self-esteem too.

Pros & Cons


  • Increases natural testosterone production
  • Supports muscle growth and increases strength
  • Elevates energy, libido, and mood
  • All-natural, high-quality, researched ingredients
  • Safe and transparent formula
  • Over 1 million bottles sold


  • Premium pricing, but considerably cheaper when buying in bulk
  • Can only be found on official website
  • Not vegan-friendly

Potential Side Effects

Most people associate the word anabolic with steroids. Fortunately, TestoFuel does not contain actual testosterone, but it helps your body to release more of its own testosterone. This makes the supplement much safer to use.

Since this supplement is 100% natural and does not contain any harmful additives, the chance of experiencing side effects is very low. Some possible side effects include insomnia, headache, and nausea.

Always read the labels and ingredients list before consuming and contact your doctor if you have any concerns.

When to Take TestoFuel

TestoFuel comes in a bottle with 120 capsules, which is enough for 30 days.

For best results, take 4 tablets daily, one with breakfast, one with a morning snack, one at lunch, and one at dinner. Always take each capsule with food.

Price and Offers

TestoFuel has a premium price, set for its high-quality ingredients and high-standard production and manufacturing process. Although you may be paying more for TestoFuel than other muscle-building supplements, know you are purchasing clinically proven ingredients that are proven to work.

One bottle costs $59 USD, but if you buy 2 bottles, you get 1 free, and if you buy 3, you get 2 free! This takes the price down to $35.40 USD per bottle. This is a great price and you will have a 5-month supply.

If you want to get a 12 month supply, you will get 30% off your order - that's over $200 USD in savings.

Note that TestoFuel does not accept returns for any used or opened items. To return unused and unopened items, contact within 30 days for US/Canada and 14 days for the UK/rest of the world.

Customer Reviews

With many reviews, customers seem to confirm the brand's claims about TestoFuel. Check out some of these genuine testimonials from customers below:

After starting to take TestoFuel, Ian noticed more muscle connection as well as improved moods in the weight room and the bedroom. As someone who had tried multiple muscle-building supplements, Ian claims his new body and self-confidence are well worth the price and has no plans to ever switch to another product.

Ian - Florida, US

Cyrus decided to try out TestoFuel because he wanted to be more muscular, energetic, and increase his sexual desire and confidence. Within the first week, he started to feel more active and motivated. He quickly started to notice results, which made going to the gym and keeping at it that much easier. After 2 months, Cyrus has dropped 3.5 inches around his waist and simultaneously gained 5kg of muscle. Cyrus now feels confident in the gym, on the beach, and in the bedroom.

Cyrus - Copenhagen, Denmark

After consistently working out since the age of 20 and trying multiple supplements, protein shakes, and pre-workouts, Kashif was not seeing the defined body he wanted. He decided to try out TestoFuel because it does not contain actual testosterone. Kashif has not been disappointed with the results and has been ordering ever since he started.

Kashif - UK

Getting The Best Results

Taking your doses spread out across the day is the best way to see the best results from TestoFuel, including muscle building and fat burning results. The manufacturer recommends that you take one tablet first thing in the morning with breakfast, one with a morning snack, and one at lunch and dinner. Always take the capsule with food.

Eating well: The food that you eat while taking TestoFuel will have the best effect on helping you get the results that you want. Eat a diet that is rich in foods that are going to support your muscle gain including leafy greens, and high-protein food like eggs, fish, lean meat, avocado, nuts and seeds.

Working out: TestoGen will only help you get the results that you want when you are combining it with an effective workout plan for improved muscle gain and testosterone levels. You should train well to get the best results especially when it comes to compound movements like pull-ups, push-ups, squats, lunges and bench presses.

Conclusion: Is TestoFuel Worth It?

Based upon our research of this product and the feedback we have reviewed, TestoFuel is safely a recommendable muscle-building supplement.

The ingredients are 100% natural and clinically proven to work. This supplement can elevate testosterone production, increase muscle growth, enhance mood/motivation, and speed up metabolism.

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Frequently Asked Questions

Is TestoFuel approved by the FDA?

TestoFuel is made in FDA-approved and Good Manufacturing Practice (GMP) certified facilities in the USA, which means this product is monitored and produced to international quality standards.

The capsule itself does not need FDA certification because it is a natural supplement, not a drug or medication.

How soon can I expect to see results?

If you follow a balanced diet and regularly work out, you can start to see results in 1 to 2 weeks. Most people can see real results within the first couple of months. The longer you take it the better results you will see as this is not a magic pill or quick fix.

Are muscle-building supplements useful?

Muscle-building supplements can be useful to improve physical performance and can help stimulate muscle growth. It is important to choose one that fits your needs and to combine it with a balanced diet and regular physical activity.

Is TestoFuel vegan?

No, TestoFuel is not vegan. The supplement includes oyster extract and the capsules use gelatin, which are both non-vegan.

How many servings are in one bottle of TestoFuel?

One bottle of TestoFuel contains 120 pills, which is enough for 30 days if you take the recommended four capsules per day.

Do I have to diet and exercise while using TestoFuel?

To get the best results, it's highly recommended that you combine TestoFuel with an overall healthy lifestyle, including a balanced diet and regular workouts.

Is TestoFuel safe for women?

Excess testosterone can have negative effects on women, so check with your doctor before starting to take any supplements.


1. Pilz, S et al. Effect of vitamin D supplementation on testosterone levels in men. Horm Metab Res. 2011;43(3):223–225

2. Ushiroyama, T et al. Effect of continuous combined therapy with vitamin K2 and vitamin D3 on bone mineral density and coagulofibrinolysis function in postmenopausal women. Maturitas. 2002; 41; 211-221

3. Ito, A et al. Menaquinone-4 enhances testosterone production in rats and testis-derived tumor cells. Lipids Health Dis. 2011; 10: 158

4. 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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8. Netter, A et al. Effect of zinc administration on plasma testosterone, dihydrotestosterone, and sperm count. Arch Androl. 1981; 7(1): 69-73

9. D’Aniello, S et al. D-aspartate, a key element for the improvement of sperm quality. Adv. Sex. Med. 2012; 2: 47–53

10. Salvati, G et al. Effects of panax ginseng C.A. Meyer saponins on male fertility. Panminerva Med. 1996; 38(4): 249-54

11. Pitteloud, N et al. Relationship between testosterone levels, insulin sensitivity and mitochondrial function in men. Diabetes Care. 2005; 28(7): 1636-1642

12. 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

13. Matsuda, Y et al. Effects of oyster extract on the reproductive function of zinc-deficient mice: bioavailablity of zinc contained in oyster extract. Congenit Anom. 2003; 43(4): 271-9

About the Author

Steven has been into health, nutrition, and fitness for over 10 years, and has a degree in Physical Education and Coaching. He is an expert in supplements and is devoted to helping his clients achieve their fitness goals and live their best lives.

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