RSP Prime-T

RSP Prime-T


tl; dr ... Short and to the Point
Who is this article aimed at?
Anyone looking to boost their T without breaking the bank and considering RSP Nutrition's Prime-T.
I am busy - summarize it for me

Prime-T certainly hasn't gone overboard in the packaging design department, but have they saved the best for inside the bottle? Our review has everything you need to know about this booster before you put your hand in your pocket.

Our Supplement Rating
  • Ingredients :
  • Price :
  • Trust :
  • Testimonials :
  • Company :
  • Overall Score: 8.4/10
  • Positive

    • Several good T boosters in active doses
    • No proprietary blends
    • Reasonably priced
    • Reputable company
  • Negative

    • Missing a couple of key ingredients
    • Anti estrogen profile needs to be stronger
    • Just one serving a day

Prime-T Review

Remember that Simpsons where the Mafia and Yakuza end up fighting on the family’s front lawn? Remember Homer is watching a quiet little guy who hasn’t done anything because he’s sure he’s sure something cool will happen?

Always the quiet ones

That’s a little how I feel about Prime T by RSP Nutrition. In a market of bold claims and loud packaging, there’s something refreshing about a no frills brand that doesn’t feel the need to jump off the shelf at you.

Of course it could just be the company are a bit cheap and have cut as many corners on marketing as they have the formula. There’s only one way to find out.

RSP Prime-T

Prime-T promises you;

  • Support for free and serum testosterone
  • Greater lean muscle
  • Stronger libido
  • Better T and estrogen balance
  • Sustained prostate health

In a further show of confidence, we got all the individual dosages right there on the label in plain sight. No proprietary blends, which is great.

So as far as we’re concerned Prime-T stands for Prime Target for reviewin’. Let’s check it out

How Does It Work?

At a Glance

  • Vitamin D3 & D-Aspartic Acid to boost T
  • DIM to limit estrogen
  • Fenugreek to balance blood sugars
  • B vitamins to help with energy
  • Maca to boost libido
  • Boron to improve hormonal balance

We’ll breakdown everything you need to know after the scores

The Scores

The Scores

Active amounts of Vitamin D3,  D-Aspartic Acid, boron and fenugreek give Prime-T in a stronger base than a lot of boosters and ensure it will be of some use to most. Zinc though is disappointingly light and though the B vitamins help with energy and overall health, they don’t do much for T.

The anti-estrogen profile could also be stronger and just one serving a day means for all Prime-T’s plus points it won’t be as effective as it might have been.


Around $30 a month is no small ask of your wallet, but in reality it’s about average for this kind of booster. Given then that though it’s not perfect, Prime-T is an above average product, it’s probably pretty good value. So if the really top quality options are a little out your price range for the moment, then this is potentially a pretty good stop gap.


Trust is not an issue with Prime-T really. It’s from a well-established company, so isn’t any kind of money making scam. It’s produced in the U.S so has to comply with GMP regulations and there are no proprietary blends keeping us out the loop on ingredients. There are a few issues however.

One or two components aren’t maybe as strong as they’re presented and suggesting that just one serving a day is optimum is pushing it.


Prime -T is generally very strongly reviewed on the retail sites where it’s available. Great as that is, we always say user feedback of this sort is usually short of details and usefulness. We’re not saying all these positive experiences are fake, just that, without the depth of dedicated individual testimonials it’s difficult to make a properly informed choice.


RSP Nutrition was founded in 2009 in Miami Florida by student athletes to help support a variety of fitness goals naturally.

Since then they have gone on to produce many supplements covering nearly all aspects of a healthy lifestyle. Their products are popular and we couldn’t find any major scandals. A bit more company background would be nice but that’s a small thing.

How Do I Take It?

Users take 1 serving of 4 capsules 30-60 minutes before bed.

Boosters that do this are really head scratchers. Not only is just one serving going to sustain things for a few hours at the most, is bed time when you need high T the most?

Well, if it is, lucky you, but a lot of need T for our busy day.

Any Prime-T Side Effects?

In rare cases there have been reports of saw palmetto causing headaches, dizziness and stomach upset, but aside from that very slim possibility, there’s really nothing that gives us cause to worry.

Where Can I Get Prime-T?

Prime-T is on sale from in U.S for a $35, getting you a month’s supply and £25 in the U.K from iherb.

Ingredients – In Detail


Vitamin D3

Naturally we draw most of our vitamin D3, which is proven to stimulate T, from the sun, but as that’s not always readily available supplementing is a good idea.

To send your T in the right direction you need at least 3000IUs (ideally more – 500IUs and new research is suggesting even higher). Prime-T just makes it home with exactly that amount, though some boosters play it safe and go way higher.

Vitamin B3

All B vitamins are good news for the body, but only some specifically for T. B3 isn’t one of those. It’s more focused on heart health for example. Still, I suppose if your heart’s not pumping neither is your T…

Vitamin B12

Vitamin B12

Vitamin B12 can aid with general energy levels but frankly with such a small amount here it’s probably of limited use.

Folic Acid

Folic Acid helps you keep what your T has earned and keep you going to build on it. It helps to maintain muscle by repairing damaged muscle tissue and promoting key DNA and RNA synthesis. It also raises nitric oxide, increasing blood flow and energy.



Zinc is kind of a must for any natural T booster. It’s key for some of the vital building blocks of healthy male hormone and is hard to get enough of from diet. So supplementing will help your follicle stimulating hormone, luteinizing hormone and growth hormone. Just 12mg is disappointing though, a safe daily tolerance is around 30-40mg.


D-Aspartic Acid

This amino acid is another must have cornerstone for a quality booster. Not only does it boost a lot of the same key precursors as zinc – LH, FSH and GH – it may also remove rate limits in the testes on how much T is produced. Doing this though needs a hefty dose of 3000mg and over. Luckily, Prime-T has that.



Diindolylmethane is a nutrient found in green leafy veg which some studies show may reduce the female hormone estrogen. However it’s not as clinical solid as some other natural options for this, and trials show it isn’t an estrogen blocker so much as a modulator as it can move levels up or down.



Fenugreek helps us on a number of levels. For one thing it’s an aphrodisac and can help put us in the mood. Also it stimulates androgens needed for T production. But even beyond that it can help balance blood sugar which regulates insulin and stops it negatively affecting T output.



Purely a libido booster with no real help for T. It’s only here in a small amount but probably still could’ve been used better. It all counts.

Safed Musli Extract

Rat studies do point to some promise in helping to reduce stress, raise libido and erection strength but that is at a much higher dose than we’ve got here. So don’t get your hopes, or anything else, up here.



Strong choice to end on. Studies have shown boron can not only raise T but lower estrogen also, all with a modest dose. With 5mg, Prime- T is in with a shot of helping your balance.

Anything Missing?

Vitamin B6 would strengthen the anti-estrogen credentials of this booster and a strong amount of magnesium would help to raise free T. There’s a bit of filler here that could certainly be substituted.


All in all Prime-T is a solid product. It has a lot of the basics of a top quality booster at a reasonable price. Although it is missing one or two touches and takes it’s eye off the ball from time to time.

So if you can afford better, there is better but for those on a tight budget this is decent.

Studies Quoted in the Review

  1. Pilz, S et al. Effect of vitamin D supplementation on testosterone levels in men.  Medical University of Graz, Austria (2011)
  2. Blond E, Rieusset J, Alligier M, Lambert-Porcheron S, Bendridi N, Gabert L, Chetiveaux M, Debard C, Chauvin MA, Normand S, Roth H, de Gouville AC, Krempf M, Vidal H, Goudable J, Laville M Nicotinic acid effects on insulin sensitivity and hepatic lipid metabolism: an in vivo to in vitro study. Research Centre in Human Nutrition Rhône-Alpes and CENS (Centre of -European Nutrition Safety and Health), Hospices Civils de Lyon, Pierre Bénite, France. (2014)
  3. Böger RH, Bode-Böger SM, Thiele W, Creutzig A, Alexander K, Frölich JC. Restoring vascular nitric oxide formation by L-arginine improves the symptoms of intermittent claudication in patients with peripheral arterial occlusive disease. Institute of Clinical Pharmacology, Hannover Medical School, Germany. (1998)
  4. Stanhewicz AE, Kenney WL Role of folic acid in nitric oxide bioavailability and vascular endothelial function. A.E. Stanhewicz and W.L. Kenney are with the Noll Laboratory, Department of Kinesiology, The Pennsylvania State University, University Park, Pennsylvania, US (2017)
  5. Kilic, M et al. The effect of exhaustion exercise on thyroid hormones and testosterone levels of elite athletes receiving oral zinc. Selçuk University, Konya, Turkey (2006)
  6. Topo E, Soricelli A, D’Aniello A, Ronsini S, D’Aniello G. The role and molecular mechanism of D-aspartic acid in the release and synthesis of LH and testosterone in humans and rats. Stazione Zoologica Anton Dohrn, Napoli, Italy (2009)
  7. Hong C. Bcl-2 family-mediated apoptotic effects of 3,3′-diindolylmethane (DIM) in human breast cancer cells Department of Nutritional Sciences and Toxicology, University of California (2002)
  8. Kochhar A, Nagi M. Effect of supplementation of traditional medicinal plants on blood glucose in non-insulin-dependent diabetics: a pilot study Punjab Agricultural University, Ludhiana, Punjab, India (2005)
  9. Dording CM, Fisher L, Papakostas G, Farabaugh A, Sonawalla S, Fava M, Mischoulon D. A double-blind, randomized, pilot dose-finding study of maca root (L. meyenii) for the management of SSRI-induced sexual dysfunction. Depression Clinical and Research Program, Department of Psychiatry, Massachusetts General Hospital, Boston, MA 02114, USA (2008)
  10. Rowland W Rees, David J Ralph, Michael Royle, Salvador Moncada, and Selim Cellek Y-27632, an inhibitor of Rho-kinase, antagonizes noradrenergic contractions in the rabbit and human penile corpus cavernosum The Wolfson Institute for Biomedical Research, University College London, Gower Street, London WC1E 6AE (2001)
  11. Naghii MR, Mofid M, Asgari AR, Hedayati M, Daneshpour MS. Comparative effects of daily and weekly boron supplementation on plasma steroid hormones and proinflammatory cytokines University of Medical Sciences, Tehran, Islamic Republic of Iran. (2010)
tl; dr ... Short and to the Point
Who is this article aimed at?
Anyone looking to boost their T without breaking the bank and considering RSP Nutrition's Prime-T.
I am busy - summarize it for me

Prime-T certainly hasn't gone overboard in the packaging design department, but have they saved the best for inside the bottle? Our review has everything you need to know about this booster before you put your hand in your pocket.

Our Supplement Rating
  • Ingredients :
  • Price :
  • Trust :
  • Testimonials :
  • Company :
  • Overall Score: 8.4/10

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