TestoFuel vs Prism Naturals Testosterone Booster [Which Is Best?]


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TestoFuel vs Prism Naturals Testosterone Booster

It’s time for our TestoFuel vs Prism Naturals Testosterone Booster review. This brings together two big sellers online.

But TestoFuel seems to have gone down a more challenging route and do not rely on the likes of Amazon as Prism Naturals has.

That’s still doesn’t tell us which is the better product though, after all, that’s what we are looking to discover. Here at CLM, we’re only interested in proven ingredients that really work. The dosages being all important for ensuring a supplement will really get your T levels rocketing.

What exactly do we want from these products then? Like with any quality T booster, we want:

  • More Strength
  • Enhanced Libido
  • Elevated Mood
  • Increased Energy

So, which of our TestoFuel vs Prism Naturals Testosterone Booster products can deliver? Let’s get to know them a little better first.

TestoFuel vs Prism Naturals Testosterone Booster: Who Makes These Products?

Roar AmbitionTestosterone Booster - TestoFuel box bottle

The people behind TestoFuel are this UK based company.

They have a loyal following with many people taking to the net to post their before and after profiles.

Part of their success is down to the way they treat their customers. They have a money back guarantee and they check and amend their ingredients and dosages regularly. This means the customer is always getting the best possible version.

Shipping directly from the UK and USA they make all their products to please both the GMP and FDA regulations.

In terms of endorsements, theirs are as good as any. None other than former Mr. Universe Robby Robinson puts his name to this product.

Roar Ambition also makes a fat burner called Instant Knockout. This is endorsed by UFC fighter Diego Sanchez who uses it to make weight before a bout.

Prism Naturalsprism-naturals-testosterone-booster

The second company here are not as open and easy to find out about.

We know what we do because of Amazon and a few bits of information. This makes the fact that it sells well on Amazon a little baffling. People are buying this without knowing more about who makes it first.

We know they make a beard growth support supplement!

They make a few general promises regarding this T booster. Increased T is there but so is fat loss support and more stamina. We will see if they can do any of these things well.

It is made in the USA in FDA approved facilities.

TestoFuel vs Prism Naturals Testosterone Booster: Ingredients

This is where we can really see which is the better product. The early signs favor TestoFuel for sure. This is because Prism Naturals Testosterone Booster is made up of one proprietary blend. All their ingredients are in it and it only totals 900 mg.

This means we cannot see the dosages of any ingredients making it difficult to see if they will be effective or not.

The suggested servings are also better in TestoFuel. They advise taking one capsule 3-4 times a day. This will really spread out the T boosting effects. Compare this to Prism Naturals Testosterone Booster who advise taking 1-2 capsules a day and you can see why TestoFuel are right.

Mutual Ingredients


The only mutual ingredient.

TestoFuel has gone for the Siberian variant, whilst Prism Naturals have included Asian Red Ginseng Extract.

It is a traditional ingredient that you will see in a T booster thanks to its ability to help the body deal with the effects of stress.

Since stress is a known killer of T, anything that can protect you from it will mean your testosterone levels will not be negatively affected.

It is also good for keeping prolactin levels down. Studies have shown that people with higher prolactin levels tend to have lower T.

There is one study that shows how rats with 5% Panax Ginseng in their diet for 60 days have shown significantly increased blood testosterone levels. We’re not really into studies that don’t involve human trials but it sounds promising.

Ginseng is even thought to be an effective libido enhancer so it is ticking a lot of boxes.

TestoFuel has gone for 100 mg which will give you a nice top up. Prism Naturals? We have no idea as it is in the proprietary blend.

Individual Ingredients


Vitamin D3

One of the most important T booster ingredients around.

Low levels of D3 are linked to low testosterone so keeping it topped up is vital. So many of us are deficient in the western world making it an important ingredient.

Our bodies actually create their own when our skin is exposed to direct sunlight. The problem is that we clearly aren’t getting enough rays!

Such an important ingredient gets a huge 5,000 IU from TestoFuel, an optimal and safe dosage.

Vitamin K2

You will often see this alongside Vitamin D3.

This is because it prevents the calcification of the arteries that could occur when taking D3. Examine.com advise that taking both together actually increases the effects of each.

This is the version of the K vitamin that is absorbed the quickest and at 180 mcg, you are getting all you need.

Vitamin B6

Through stimulating androgen receptors, this ingredient gets you producing more T.

It also inhibits the Sex Hormone Binding Globulin. This is what binds your T so you cannot use it. By reversing this it means you are freeing up T and are able to put it to use.

Not done yet, B6 also supports your immune system and cannot be stored by the body. This means supplementing it is important.

At 5 mg, you are getting an optimal dosage again.


A great ingredient for your T.

You will find plenty of ingredients in a good T booster that inhibits SHBG, Magnesium is another.

The Journal of Pharmaceutical and Biomedical Analysis advise that men with more magnesium in their blood tend to have higher levels of free T.

Another trait of magnesium is that it helps the body cope with the effects of aging and exercise.

We are getting 200 mg from TestoFuel, another great dosage.


Up there with the best ingredients for a T booster.

Our bodies cannot create more T without it so you can see why.

Zinc is good for stimulating the luteinizing hormone. This communicates with the testes to create and release more testosterone. It is also good for ensuring your body does not deplete it’s T levels during an intense workout.

The 10 mg in TestoFuel, as well as the Oyster Extract (which is high in Zinc),  means you are getting an optimal dosage.

D-Aspartic Acid

A very effective and fast working ingredient.

This is backed up by various studies including one that shows it to increase T levels by 50% in under 2 weeks!

DAA also stimulates the luteinizing hormone and increases the Human Growth Hormone level in the body.

As well as all this it puts your protein to work – towards your gains.

To give you an indication as to how well they have dosed it. TestoFuel have included 2,300 mg which is an optimal amount and way more than the whole of the total ingredients (900 mg) in Prism Naturals. An optimal and safe dosage.


A traditional ingredient and one of the better libido enhancers.

This is the kind of trait we are after in a T booster and it is also an aromatase inhibitor.

Good for lowering estrogen then. This is important as it means your T has more room to thrive.

There are also many studies backing its ability to stabilize blood sugar levels. This is great because when the balance of your blood sugar is fluctuating, your testosterone levels suffer.

The 100 mg is a great top up of an effective ingredient.

Oyster Extract

We mentioned this was high in Zinc but it is a useful ingredient in other ways.

It contains numerous trace elements that are great for your body. A good way to end the ingredients in TestoFuel.

Prism Naturals Testosterone Booster

A decent ingredient, this amino acid gets more important to us the older we get.

It is thought to be useful for testosterone support and it increases the blood flow to the testes. This is good for their health and it results in your T being transported around the blood a lot easier.

WebMD advises that it converts into nitric oxide in the body. This causes blood vessels to open wider for improved blood flow.

A good addition to this product but the ideal dosage is between 300 – 600 mg. Given the overall blend total, it is unlikely that we are getting enough.

Horny Goat Weed

A decent ingredient in that Examine.com says it is a traditional Chinese medicine and a famous aphrodisiac. Libido-boosting should be one of the benefits for a T booster.

Examine does go on to say that it has shown promise for increasing T in research animals. This isn’t a bad thing of course but we will wait until there have been human studies to back this up before we get excited.

We need at least 200 mg for the above benefits to be felt. The proprietary blend lets the product down once again.

Saw Palmetto Berry

Without successful studies on humans, an ingredient cannot be labeled a proven T booster.

This is an ingredient that doesn’t have the backing it needs. Instead, a lot of maybes as WebMD advises that it might prevent testosterone from being converted to dihydrotestosterone (DHT). This would be good if it was proven to be true. DHT is linked to baldness.

However, we want more testosterone here. We would need 150 mg to get the above and we have no idea if it’s in this product.

Muira Puama Extract

There are some that believe this is a T booster but those that advise against this seem to be the majority.

According to Examine.com it is traditionally used as an aphrodisiac. However, according to them, it is lacking in terms of human trials and sexuality trials.

Examine do say that it has been shown to be quite effective as a cognitive enhancer.

More at place in a nootropic, it would seem.

Then there is the recommended dosage which at 1,200 – 1,500 mg is more than the entire contents of a daily serving here. Underdosed then!

Ginkgo Biloba Extract

Another more suited to a nootropic.

It is used in supplements to improve memory so we have no idea why it is here.

It appears they have gone for a very general approach to this product. Although they said this supplement would help you burn fat, we have seen no evidence of that!

According to Examine.com the brain-boosting effects are not reliable anyway.

How much space is this wasting? We’re not sure because of the proprietary blend of course!


A good idea to include it.

Well, a good idea if the other ingredients are proven T boosters. This is because BioPerine enhances the capabilities of the other ingredients it is consumed with.

Derived from black pepper it is only worth bringing out the best in a good ingredient, otherwise, it is a waste.

TestoFuel vs Prism Naturals Testosterone Booster Side Effects

The good news is that neither product has anything in each serving to worry about.

TestoFuel uses proven ingredients at optimal and safe dosages. Prism Naturals have gone for some decent ingredients and the dosages are not going to be high enough to worry about.

As always, if you have allergies, check the label.

TestoFuel vs Prism Naturals Testosterone Booster Pros and Cons

TestoFuel Pros

  • 100% Natural Ingredients
  • No side effects
  • Plenty of great reviews
  • Reliable Testosterone booster
  • No proprietary blends
  • Reputable company

Prism Naturals Testosterone Booster Pros

  • Ginseng and BioPerine are good ingredients

TestoFuel Cons

  • Only available online

Prism Naturals Testosterone Booster Cons

  • Ineffective ingredients
  • Proprietary blend
  • Underdosed ingredients
  • Suggested serving not ideal

TestoFuel vs Prism Naturals Testosterone Booster Conclusion

Winner: TestoFuel

TestoFuel Reviews Conclusion

Read our full TestoFuel Review

Buy TestoFuel from: www.testofuel.com

(Clean Lean Machine tip: Take advantage of their free 1 month supply when you order 3 boxes whilst the offer is still available!)

A worthy winner, it tops the list of our best T boosters for a reason.

Sure, the opposition today ended up being weak by comparison but don’t let that take anything away from TestoFuel. It is hard to find a T booster that has some many top ingredients and optimal dosages.

The main thing is – it works! I mean, it really works. So many testimonials have proven this and we have used it many times to get our T on the rise in the most effective way possible.

All you can ask is for a safe and effective supplement. TestoFuel does all that and goes beyond.

Buy TestoFuel from: www.testofuel.com

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