RSP Nutrition Prime-T Testosterone Booster Review


My RSP Nutrition Prime-T Test Booster Review First Look:

It is 6am and I am staring at the screen.

I feel shattered, my body is drooping over the keyboard and I know tonight is weights night.

I just have to get through a day of work and what ever nonsense that may unearth before I can return later today to then do my laundry, wash the dishes, cook and then hit the iron.

However, right now, that does not seem appealing.

I feel low on energy and overall I just feel low on testosterone. The magic seems to have disappeared.

I can recall sometimes cycling 29 miles home after work before then smashing it up in the gym and cycling home after that in the pissing rain.

I never grumbled, I never felt horrifically exhausted. Not like I do now.

This is why I am looking at a bottle of Prime-T from RSP. I am hoping it can raise my testosterone levels and in turn my energy.

I have come across the ZMA from RSP a long time ago and it wasn’t too bad at all, and it encouraged sleep. The problem is, I do not need encouragement to sleep, I just need time to sleep.

This does follow the same format of design as the other RSP products which at least emits some sort of corporate family face; this can help instill some trust in a brand.

It looks professional, it looks reliable and good enough that on image alone you will hand over them dollar bills.

Ingredients: The Science

Vitamin D – D3 is a great Testosterone boosting vitamin that must be taken advantage of to trigger further production of Testosterone in your body. If you are looking for a testosterone booster ensure that it contains D3.

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

Most Western people are deficient in D3 and it is why TestoFuel includes a large dose.

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

Niacinamide (Vit B3) –  Higher amounts of niacin can supposedly improve cholesterol levels and lower the risks associated with the cardiovascular system and maybe symptoms for Alzheimer’s .

However, the jury is out on these real benefits as the results from studies are not entirely conclusive.

Folate – Being low on folate means you are unable to absorb nutrients properly from the bowel.

Vitamin B12 (cyanocobalamin) – Studies show that people who are anaemic tend not to have high levels of testosterone because they cannot absorb vitamin B12.

Gives you more energy and boost your metabolism, helping you shed unwanted pounds. Ensure you are not deficient in Vitamin B12 so you can do that quick 10 miler at 5am…

Magnesium – Research into magnesium supplementation also increased testosterone production in men. This is often found in the most effective natural T boosters.

Zinc – An aphrodisiac and Testosterone Booster.

Zinc is also very important for the functioning of the enzyme, hormone, and immune systems.

Studies demonstrate that 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.

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 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 to be effective.

Don’t buy a natural test booster without it!

Fenugreek – Fenugreek is a proven ingredient as found in our benchmark testosterone boosting product; Testofuel.

Research shows that a fenugreek seed extract can reduce daily fat intake in overweight men when taken by mouth at a dose of 392 mg three times daily for 2-6 weeks.

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 according the the studies commissioned.

Not one to help us at all.

DIM (Diindolylmethane) – Diindolylmethane appears to promote a healthy balance of testosterone in the body and is found in vegetables such as broccoli.

Safed Musli Extract (Chlorophytum Borivilianum) – Not a great deal of studies or evidence from studies on this ingredient is available.

What has been established is that a dose of 500mg for 12 weeks increased semen count significantly, there was a slight raise in testosterone but not by a great deal.

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.

Also helps raise testosterone levels.

BioPerineThe extract of piperine, called BioPerine®  in the patented form, has been clinically tested in the United States.

BioPerine®  significantly enhances the bioavailability of various supplement nutrients through increased absorption.


4 capsules per day which is an optimal amount. However, it is suggested all 4 are taken just before you go to sleep in the evening, or morning if you do shift work.

We would recommend that you 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.

With a daily dose of 4637.8mg you have an excellent amount for your body to work with.


There are some excellent ingredients here which are so often only found in the best testosterone boosters.

D-Aspartic Acid and D3 are the cornerstone of a testosterone booster which can elevate it from mediocre to good. These are key ingredients.

Then there’s B12, Magnesium and Zinc which again are key players due to being able to maintain and stimulate testosterone levels.

Fenugreek is another excellent addition and found in TestoFuel which I saw great results with.

DIM is essentially found in vegetables such as Broccoli, athletes are known to eat broccoli raw and daily as it prevents your estrogen levels getting too high.

NFL player David Carter eats broccoli as his meal plan.

Boron is another testosterone booster and it also prevents inflammation which can suppress testosterone production.

Too much (chronic) inflammation can also open the flood gates to obesity.

BioPerine or black pepper helps your body absorb the nutrients and Folate prevents loss of nutrients from the bowl.


I am surprised to see the omission of B6; B6 is the very foundations of a testosterone booster along with Magnesium and Zinc, this is known as a ZMA supplement.

It would also have been good to replace Maca, Safed and Niacin with ingredients that actually work and have studies to prove this with ingredients such as:

  • B6
  • Ginseng
  • K2
  • Oyster extract

It is unfortunate that RSP included a number of ingredients that are considered effective based on anecdote rather than scientific studies, this is why it does not come close to those test boosters in the top 3.

RSP Nutrition Prime-T Testosterone Booster Review Conclusion:

This is not a bad product at all.

It contains some of the most key and effective ingredients to stimulate more testosterone production.

It also has a great whacking daily dose as well to help things along.

However, it does have its flaws…

For all of its great additions it also contains 3 ingredients that have no conclusive scientific backing to their effectiveness.

Instead they should have included a couple more ingredients that are known to work and therefore they would have had a more complete supplement on their hands.

This is good, but it is not quite up there with the best just yet. That said, with a few minor amendments it would be.

Check out what the better options, here.

We Expose The Top 3 Testosterone Boosters

> Build Slabs Of Muscle

> More Energy

> Lose The Belly

> Increase Strength

> Improve Overall Well Being

READ: Read Which Products Can Benefit YOU

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