TestoFuel is a natural testosterone booster that claims to increase muscle mass, reduce body fat, and improve energy levels. It is manufactured by Roar Ambition, a UK-based sports nutrition company that generally has a very good reputation in the industry.
The supplement is formulated from natural ingredients that are clinically proven to increase testosterone production and protein synthesis. Some of the key ingredients in TestoFuel include D-aspartic acid, panax ginseng, fenugreek, maca, oyster extract, magnesium, boron, zinc, and vitamin D3.
And the most important thing when it comes to looking at testosterone supplements, is that these ingredients are all dosed in their clinically tested effective ranges. This is actually rarer than you'd think (something that doesn't speak well of the supplements industry as a whole) and immediately makes Testofuel one of the better products on the market. For helping boost testosterone levels effectively.
As you'd expect for a brand endorsed by former Mr Olympia Robby Robbinson, TestoFuel really focuses heavily on the building lean muscle mass element of testosterone boosters, which is why it leans quite heavily into ingredients like DAA and vitamin D supplementation which have been shown to boost athletic performance and muscle mass regardless of their effect on testosterone levels. [1,2]
It does still function for other reasons why men would look to boost testosterone levels, and will have some improvements on mood and energy, however, muscle mass is where TestoFuel really shines, with a secondary focus on libido boosting ingredients.
For example, if you were looking for something that focused more around mood, you'd look for a Ginseng and Ashwagandha based testosterone booster like Prime Male, rather than just Ginseng in Testofuel. Or if you're looking for the suppression of estrogen levels a product like Hunter Test could be a better alternative due to the high dose of luteolin.
All of these ingredients would raise testosterone levels, but they have secondary functions as well which make them more suited to specific peoples goals.
In fact, we would go so far as to say if you're looking for a muscle building testosterone booster, then Testofuel is probably the best on the market right now.
TestoFuel works by stimulating testosterone production and protein synthesis in the body. It also regulates insulin and glucose, which are crucial to weight control. The supplement contains D-aspartic acid, which has been shown to significantly increase testosterone levels within 12 days of use.  It also contains panax ginseng, which improves libido and regulates dopamine, and fenugreek,  which boosts metabolism, physical strength, and energy levels as well as it's effects on increasing free testosterone levels.
TestoFuel also helps reduce body fat, including stubborn belly fat. It regulates glucose and insulin levels, which speeds up and sustains fat loss. It also enhances mood and self-confidence, without depending on stimulants like caffeine. Instead, it uses natural ingredients like maca and vitamin D3 to boost confidence and improve mood.
So, what do customers have to say about TestoFuel? According to reviews on the manufacturer's website and other online retailers such as Amazon, many users have experienced positive results from taking this supplement.
Most users report increased energy, strength, and muscle growth, while others have noticed improvements in libido, mood, and overall well-being. Many customers appreciate the all-natural ingredients and the lack of side effects compared to other testosterone supplements.
Considering that TestoFuel has been around for about a decade they have a long track record of positive reviews.
On top of that they have a celebrity endorsement from former Mr Olympia Robby Robinson, which as far as customer reviews go is a pretty good one.
The parent company Roar Ambition also have pretty good ratings on TrustPilot and BBB coming in at 4 stars which is incredibly rare for manufacturers of testosterone boosters and a credit to the company as a whole.
Vitamin D: This nutrient is produced in the body when it's exposed to sunlight and is essential for a variety of bodily functions, including bone health, immune function, and hormone production. Research has shown that vitamin D can boost testosterone levels in men with low levels of this hormone. 
D-Aspartic Acid: This amino acid is involved in the production of testosterone and other hormones in the body. Studies have shown that supplementing with D-aspartic acid can increase testosterone levels, improve sperm quality, and enhance muscle growth. 
Fenugreek: This herb has been used for centuries in traditional medicine to enhance libido and male fertility. Research has shown that fenugreek can increase testosterone levels, improve sexual function, and reduce body fat. It's also been shown to boost athletic performance and improve muscle building speed.[4.5]
Zinc: This mineral is essential for many bodily functions, including immune function, wound healing, and hormone production. Research has shown that supplementing with zinc can increase testosterone levels, improve sperm quality, and enhance muscle growth. Particularly in men with even a small zinc deficiency, supplementing with the essential mineral was shown to raise both free testosterone and serum testosterone levels. 
Magnesium: This mineral is involved in over 300 enzymatic reactions in the body, including muscle and nerve function, blood glucose control, and hormone production. Research has shown that supplementing with magnesium can increase testosterone levels, improve muscle strength, and enhance exercise performance. 
Vitamin K2: This nutrient is essential for bone health and has been shown to improve testosterone levels in men with low levels of this hormone. 
Maca: Whilst Maca doesn't effect testosterone production directly, it has been shown to be effective for symptomatic relief of low testosterone. Mostly as a libido booster (where it has the most studies to back it's use), it has also been shown to improve energy levels, mood and athletic performance, making it a common ingredient in higher quality testosterone boosters all the same. It has also been shown to boost sperm count. [9,10]
Oyster extract: Oyster extract has a couple of benefits, it's rich in zinc, it's been shown to be an effective libido booster, although it has limited effect on testosterone levels outside of the zinc, it's a novel and decent inclusion and contributes to testofuel testosterone boosters high score in the libido category. 
Panax ginseng: Panax (not to be confused with American Ginseng) has been shown to stimulate natural testosterone production in both men and women with test groups who supplemented the herb showing elevated saliva testosterone levels. The dosage in TestoFuel is of course the same as the dose that was used in these trials to achieve a testosterone boost. As such it's included in a lot of quality natural testosterone boosters. As an added benefit Panax Ginseng has also been shown to imrpove mood. [12,13]
vitamin B6: Vitamin b6 is essential for testosterone production, as the body doesn't store any a lot of testosterone boosters include the ingredient and it doesn't take up much capsule space so it's generally good to see included. 
Uses clinically relevant doses of boron, ginseng, fenugreek, DAA and vitamin D, which have been shown to perform well in studies.
Long track record
Positive customer reviews
Bulk orders come with a free workout plan.
Free shipping on all orders.
Buy three months and get one month free.
No money-back guarantee on opened products.
Not the cheapest testosterone supplements out there
|Contains DAA, Vit D, Fenugreek
|Maca, Fenugreek, Oyster
|Vit D, Vit B, Zinc, Ginseng
|Vit D, Fenugreek, Maca, DAA
Commonly Asked Testofuel Questions
While TestoFuel is generally considered safe and well-tolerated, some users may experience mild side effects such as stomach upset, headaches, or acne. If you experience any adverse effects from taking this supplement, discontinue use and consult your doctor.
Whilst you can get TestoFuel on Amazon in the USA, generally it's about $20/month cheaper from their website, and there's the fact that their bulk buy deals are only available direct.
It should be noted that unlike other supplement companies Roar Ambition have no reported history of unwanted billing issues on better business bureau or trustpilot meaning we'd recommend buying direct.
1 - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5340133/
2 - https://pubmed.ncbi.nlm.nih.gov/21154195/
3 - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5571970/
4 - https://www.nccih.nih.gov/health/fenugreek
5 - https://pubmed.ncbi.nlm.nih.gov/32048383/
6 - https://pubmed.ncbi.nlm.nih.gov/8875519/
7 - https://pubmed.ncbi.nlm.nih.gov/20352370/
8 - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3180407/
9 - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2928177/
10 - https://pubmed.ncbi.nlm.nih.gov/11753476/
11 - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7967744/
12 - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3861174/
13 - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7352699/
14 - https://pubmed.ncbi.nlm.nih.gov/6727359/