Doctor Recommended Supplements X-Calibur Testosterone Support Review

Doctor Recommended Supplements X-Calibur Testosterone Support Review

Doctor Recommended Supplements X-Calibur Testosterone Booster First Look:

What does ‘Doctor Recommended’ really mean?

And who is this Doctor?

Doctor WHO?

I mean, even Jeremy Clarkson has been awarded an Honorary Doctorate and I will barely listen to what he has to say about cars.

So I find it interested to hear there’s a supplement called X-Calibur of all names that seems to be recommended by a Doctor when it sounds like it would be more suited to a game of Warhammer.

Let’s be honest, it doesn’t exactly look like something your Physician would prescribe and say, in your ear, under a hushed tone, “I recommend this bad boy”.

Other than that, having excitedly eaten 4 chocolate brownies and a load of potato chips today I decided that I need to smash the gym tonight and see where it gets me.

I am really down with my last few months on a volume program because even my girlfriends parents said I look like I have lost weight…uh oh.


D-Aspartate, DAA – D-aspartic acid is one of two forms of the amino acid aspartic acid. The other form is L-aspartate. The benefits of D-AA are specific to it, and do not extend to aspartic acid or L-aspartate. D-AA can be used as a testosterone booster for infertile men, and by athletes as a temporary booster.

D-AA works in the central brain region to cause a release of hormones, such as luteinizing hormone, follicle-stimulating hormone, and growth hormone. Importantly, unlike some pro-hormones and steroids, it does not raise estrogen levels.

A dose of 2000-3000mg is required.

Calcium is added to help with solubility, thus we get Calcium D-Aspartic Acid.

Velvet Bean (Macuna Pruriens) – This is actually good for treating people with Parkinsons. There’s a mixed bag of results for testosterone but look mainly positive.

Results have shown an increase in testosterone levels in infertile men, however, results are very limited for fertile men.

It is effective to reduce cortisol levels – high stress levels can harm testosterone production.

Horny Goat Weed – Epimedium, the suspected active component of horny goat weed, appears to act as a phosphodiesterase inhibitor, similar to some drugs used for erectile dysfunction.

It does not, however, stimulate testosterone production.

Paullinia Cupana (AKA Guarana) – Studies note that 75mg guarana (9mg caffeine) was able to enhance cognitive scores related to memory and reaction time with a subsequent dose-response study noting that 75mg was more effective than higher (150-300mg) and lower (37.5mg) doses.

Vitamin D3 – Vitamin D is a great Testosterone boosting vitamin that must be taken advantage of to trigger further production of Testosterone in your body.

However, there are two types of Vitamin D. There’s calciferol (vitamin D2) and cholecalciferol (vitamin D3) – we are only interested in cholecalciferol which is D3; this is the type our skin synthesizes from the sun and becomes a hormone which results in the increases in our testosterone.

Research by the US Library of Medicine has shown that testosterone productions are increased with Vitamin D3 supplementation.

Zinc – An aphrodisiac and Testosterone Booster, but it will only raise testosterone levels if the user is deficient in zinc.

Zinc is also very important for the functioning of the enzyme, hormone, and immune systems.In very high doses, zinc can act as an aromatase inhibitor and reduce estrogen levels.

It is also a potent antioxidant and can provide benefits for prostate issues.

Vitamin K2 K2 has been shown to help maintain plasma and testes levels of testosterone.

Tongkat Ali – Eurycoma (LongJack) is a pro-fertility agent and aphrodisiac that appears to have a large body of evidence supporting this role and some evidence suggesting it may be an anti-estrogen and pro-erectile agent.

However, there is a lack of evidence for testosterone boosting in humans, although some very limited evidence in animals.

Maca Root – This Peruvian strain of ginseng is great for lifting libido and mood, however, when it comes to raising testosterone levels it has no effect at all.

No significant influences on testosterone in any tested demographic I’m afraid.

L-Arginine – This is found in many pre workout supplements or products designed to make you more vascular.

L-Arginine opens up the blood vessels and arteries to assist with blood flow, nothing really to do with testosterone but may assist with any impotency issues that are not helping you attain that hot chick in the gym who is 15 years your junior.

However, you will require 5g per day alone!

Panex Ginseng – This form of Ginseng is the most highly researched. There’s lots of evidence which suggest cognitive function, mood and immunity is increased. There is evidence for better erections and an increase in testosterone production for infertile men.

Astragalus – Bit of an all-rounder, this antioxidant helps protect the body against various stresses, including physical, mental, or emotional stress.

Tribulus – Once marveled, now known to have no effect on testosterone levels, by now supplement manufacturers should really let go.  Avoid like a medieval plague if you are looking for muscular gainz.

Boron – Boron is great for the older lifter or those doing high weight low rep work as it helps to reduce inflammation, something that is found in PrimeMale, which I am a fan of.

Lutein – Used to prevent eye diseases including age-related macular degeneration (AMD), cataracts, and retinitis pigmentosa.

studies suggest that people who consume higher amounts of lutein in their diet have a reduced risk of developing AMD.


3 capsules a day which is on its way to becoming an optimal dose

It is recommended that we have at least 4 tablets spread evenly across the day, as per the best testosterone booster on the market.

This way your body has a constant trickle of the ingredients to work with in order to stimulate testosterone.

Each daily servings consists of 2275.09mg which is getting competitive with the top testosterone boosters on the market.

Effects & Benefits:

There’s a whopping 15 different ingredients here.

Too much inflammation can help the development of chronic diseases. Astragalus and Boron is good for reducing inflammation.

Pananx Ginseng can also help with testosterone levels, as will DAA, Zinc, D3 and K2.

Velvet Bean has uses for reducing cortisol, which is essentially stress. High levels of stress inhibit testosterone production. As a direct testosterone simulator Velvet Bean seems to be effective for men who are infertile.

L-arginine is good for blood flow but much higher amounts are required than what is found here.

Guarana is dose sensitive for its effectiveness, therefore, if it is over or under-dosed it may as well not be included.


Due to the high number of different ingredients and not a huge mg content, they have diluted anything that is effective.

For example, L-Arginine requires a dose of 5000mg to work yet they have only given us 250mg which renders its inclusion as worthless.

The proprietary blend also makes me lose further confidence in a product that I thought would not be so brilliant in the first instance.

While we have 10 effective and useful ingredients, that leaves a third of them as pointless additions.

Ingredients such as Tongkat Ali, Maca, Tribulus, Horny Goat Weed and Lutein are not exactly conclusive.

We’re not dosed as much D3 as TestoFuel either and we have no idea how much DAA is included which also needs to be 3000mg. Yet, the DAA is within a proprietary blend of just 1015mg.

Let’s also factor in the RRP $89.95

Doctor Recommended Supplements X-Calibur Testosterone Support Conclusion:

It seems very unlikely a Doctor would recommend this, even if he was as unqualified as Jeremy Clarkson.

The blend conceals the exact breakdown of each ingredient. However, we do know it will be under-dosed for the vital D-Aspartic Acid. We can only assume it will be the same for Guarana which is also sensitive for correct dosing.

The D3, while excellent isn’t dosed as much as competitors and Arginine is at a woeful level that will have no effect whatsoever.

Then consider that a third of this will have no positive effect at stimulating testosterone production.

In many respects it has the right elements, but it just isn’t cobbled together correctly. You could give a blind man all of the right parts required to build a plane, but would you fly in it when complete..?

It starts to make for grim reading and too much of a risk.

Take a look at what works to maximize your workouts.



Our Favorite Test Boosters

> Increase Natural Testosterone Production

> Build Slabs Of Muscle

> More Energy

> Increase Strength

> Improve Overall Well Being


Ben BA(Hons), PGCert

Ben established this site to be a free resource in 2015. Since then it has gained over half a million visits. He has always been interested in sport and he started playing rugby at the age of 6 represented his town, county and school. Ben also enjoys cycling, has started skiing and is in the Army Reserve representing his Regiment as part of the 150 Regimental Shooting Team. He holds a bachelor's and postgraduate degree in sport exercise & nutrition.

Leave a Reply

Your email address will not be published. Required fields are marked *

Verified by MonsterInsights