TestoFuel

TestoFuel claims that their blend of ingredients will help you naturally increase your testosterone level.

While both men and women produce testosterone (T), this hormone is produced primarily in the Leydig cells of the testes. Your T can positively affect muscle mass, body fat, bone density, heart health, and much more.

There is an age-related decline in T that often begins around the age of 40, though low T can affect both the young and old.

Deficiency can cause many unwanted effects like erectile dysfunction, fatigue, reduced muscle mass, and decreased bone density.

Testofuel claims that their T-boosting supplement can help you avoid these issues.

More specifically, they state that their anabolic support complex has been researched to ensure that you will:

• Naturally and safely boost testosterone
• Increase muscle size
• Increase strength
• Burn fat
• Improve your mood
• Boost self-esteem

But can this product really deliver on its claims?

In this article, we’ll help you figure out if TestoFuel can live up to the claims by highlighting any scientific support for the active ingredients.

Effectiveness of TestoFuel’s Ingredients

TestoFuel makes some pretty lofty claims. The proposed T-boosting and muscle-building benefits are possible by taking four capsules daily for at least 2-months, according to TestoFuel.

While many companies with similar products provide only the total amount of the entire proprietary blend, TestoFuel makes it a point to detail the amounts for each specific ingredient.

This is definitely a practice that works in their favor, as this makes it much easier to compare the ingredients to the available research.

In this section, we’ll share the results of our literature review to help you determine if TestoFuel lives up to the hype.

D-Aspartic Acid – 2300mg

Like other amino acids, D-aspartic acid is considered a building block of protein. It is deemed to be non-essential as the body can make D-aspartic acid on its own.

In healthy human subjects, 3.12g of D-aspartic acid daily enhanced the release of T when compared to placebo over 12-days.

These results were not confirmed in a later randomized study; 6g of D-aspartic acid daily was ineffective at increasing T in healthy, fit men over 3-months.

A recent review of 4 human studies found that doses ranging from 3ng to 6g led to inconsistent results.

D-aspartic acid’s ability to boost T is more consistent in animal studies; more long-term research with human subjects is needed to identify a possible role in dietary supplements.

As a dosing regimen that provided more than double the amount of D-aspartic acid was not effective, TestoFuel may not offer enough of this ingredient to help you get the results you want.

Vitamin D3 – 5000IU

As vitamin D deficiency is common, supplementation may be necessary for the maintenance of healthy bones and teeth. It may even help reduce your risk of developing cancer, type 1 diabetes, and multiple sclerosis.

In addition to its other vital roles, vitamin D may also help you elevate T levels.

In healthy overweight men, those that took 3,332IU of Vitamin D daily over 1-year boosted T levels 20% when compared to the placebo group.

Evidence that vitamin D is safe and effective in this long-term randomized study is promising as TestoFuel offers an even larger dose.

Zinc – 10mg

Zinc is an essential mineral that may limit the activity of 5-alpha reductase, preventing the conversion of testosterone to dihydrotestosterone (DHT).

Zinc deficiency was associated with a significant decrease in T levels in healthy, young men; zinc supplementation boosted T.

These findings were not supported in later studies, however.

Zinc did not improve muscle endurance, body composition, or T levels in healthy subjects treated with 30mg daily for 2-months.

Zinc at 30mg daily over 56 days did not increase T levels in healthy young men.

While laboratory studies have demonstrated a relationship between T and zinc, this has not been well supported in human subjects, even at doses nearly 3x larger than the recommended daily allowance (RDA).

Oyster Extract – 100mg

Thought to increase your libido, oysters may have a mechanism of action that involves Zinc.

This relationship was demonstrated when oyster extract boosted zinc levels in deficient mice. The role of oysters in boosting T in humans has not been well studied, however.

Ginseng – 100mg

This herb is native to Asia and has been used in natural medicine for many centuries.

While ginseng supplementation did increase T in human subjects, there are relatively few studies that have examined its reproductive effects.

Much more work is needed to determine a potential role.

Fenugreek – 100mg

This herb is often used in Indian cuisine and may support digestion.

Fenugreek is popular in T-boosting supplements. It is thought to block the conversion of T to DHT, though this proposed T-boosting mechanism is not well studied.

In a randomized trial, 500mg of fenugreek over 8-weeks significantly improved body fat composition and testosterone levels. In another study, 600mg of fenugreek over 6-weeks improved libido and other sexual health parameters when compared to placebo.

These results are promising, but more long-term research is needed to characterize the T-boosting effects of this herb fully.

Vitamin B6 – 5mg

Vitamin B6 is a common T-boosting supplement ingredient as it may enhance the proposed effects of zinc and also block the conversion of T to DHT.

These zinc-related effects were demonstrated in a laboratory study using human skin cells; vitamin B6 increased zinc’s ability to limit the conversion of T.

In a rat study, vitamin B6 blocked the conversion of T to DHT.

These benefits were not seen in human studies.

The addition of 11mg of vitamin B6 to 30mg of zinc did not improve muscle endurance, body composition, or T levels.

Though B6 may offer other health benefits, its potential role in boosting T is unclear, especially in human studies.

Magnesium – 200mg

Magnesium helps your body metabolize food, transmit nerve impulses, and boost calcium absorption for bone health.

It may also offer T-boosting benefits. Over one month, 10mg of magnesium daily boosted T in both sedentary adults and athletes.

Vitamin K2 – 18mcg

This rare nutrient works to improve blood clotting as well as bone and heart health.

In rats, vitamin K2 boosted T levels. Also, deficiency of this vitamin has been linked to T deficiency in rats.

Its potential role in humans has not been well studied, however.

Is TestoFuel Safe?

The ingredients included in supplements that claim to boost T naturally are generally safe for use. You should still be aware of the contents, however.

If you’re an athlete or in competition, it is a good idea to check the Controlled Substances Act for any banned substances your supplement may contain. It’s not worth missing a game over a dietary supplement.

The ingredients offered in TestoFuel are unlikely to cause you harm, especially when consumed as recommended. Excess amounts of these ingredients may be associated with digestive symptoms like stomach pain and diarrhea, however.

You may be more at risk for the unwanted side effects of elevated T, though there does not seem to be evidence that TestoFuel’s ingredients will boost T into an unsafe range.

Nonetheless, you should be mindful of the signs of elevated T:

• Facial and body acne
• Voice changes
• Excess body hair/ male pattern baldness
• Mood fluctuation

As hormone levels are tightly regulated by a variety of systems within your body, treating low levels should be done under the supervision of a medical professional.

If you think you are experiencing signs of low T, or if you feel you can benefit from a T-boosting dietary supplement, it’s safest to speak with a physician before use.

Pricing and Guarantee

You can purchase TestoFuel directly from their website; there are several options depending on your needs and budget.

When reviewing the table below, keep in mind that each box of TestoFuel contains 120 capsules - the equivalent of a 1-month supply.

While this supplement is relatively expensive, TestoFuel does offer the opportunity to save when you purchase more. For example, they’ll add two free boxes to your 4-box purchase, driving the price down to about $43/box.

They also try to ease any hesitation to purchase based on your budget by offering a 90-day guarantee on all purchases.

Alternatives

There is a wide array of T-boosting supplements available, and some even offer blends similar to TestoFuel.

Mega Men from GNC is a reasonably comprehensive supplement with 30 ingredients, some of which overlap with TestoFuel’s ingredients label.

In addition to vitamins D3 and B6, zinc, and fenugreek, you’ll get a variety of vitamins, minerals, amino acids, and extracts that work to offer support for your prostate, T levels, circulation, and brain. A 30-day supply is $79.99.

Lean Nutraceuticals offers a 1-month supply of their Natural Testosterone Booster for $23.75 on Amazon. Like TestoFuel, you’ll get zinc, fenugreek, and aspartic acid.

Another less convenient option would be searching the internet for TestoFuel’s ingredients to purchase individually. You’re less likely to save money, however.

The Bottom Line

TestoFuel includes several ingredients that are commonly found in T-boosting supplements. Unfortunately, many have limited or mixed support in human subjects.

Though these ingredients are likely safe when used as directed, excess T can cause a variety of unwanted effects. When you couple this risk with the fact that levels should be managed by a medical professional, it’s a good idea to speak to your doctor before use.

Also, these supplements tend to be pricey. A better starting point may be opting for natural means of boosting T like diet and exercise (we can link my other article once it is published).