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BioPrimo® (Primobolan) + Tight® (RAD 140): All the Benefits of Testosterone without the Shutdown

by Cecilia Lodi on July 13, 2023

Ronnie Coleman, an eight-time Mr. Olympia and 90s bodybuilder, had a 58" chest and 24" biceps in his prime. A physique that embodies the "Perfect" Male Aesthetic, consisting of: 
  • Body fat less than 5%
  • Muscle bulk and definition
  • A powerful athleticism behind them

We will not discuss the coveted golden ratio or the Adonis index that professional physique builders strive for because we have a wide range of body types that can be perfect in their own right.
However, one theme that is frequently described as ideal is the "athletic" physique, which includes people with the mesomorph somatotype, who have a natural ability to gain muscle while minimizing fat accumulation. And while some sports individuals are prone to fat buildup while others struggle to develop muscle bulk, the Era of anabolic steroids was born.


If you are someone who is committed to attaining physique perfection, and has been pounding the gym for some time, or someone who plays competitive sports, you may have used or are currently integrating anabolic compounds to your training regimen.

You may also be familiar with Primobolan Enanthate, an injectable version of the steroid methenolone. Methenolone enanthate with an impressive half-life of 10.5 days, offers a similar pattern of steroid release as testosterone enanthate, with blood hormone levels remaining markedly elevated for approximately two weeks. Methenolone (Primobolan)  itself is a moderately strong anabolic steroid with very low androgenic properties making it safer to use compared to other anabolics, and with the right dose, may not even cause testosterone shutdown.

BioPrimo® (Primobolan) works superbly when used during cutting cycles and phases of fat loss. Due to its moderate anabolic strength rating, it is often stacked with more powerful compounds such as Testosterone and other anabolic substances to boost muscle hypertrophy.

Don't get me wrong, BioPrimo® does well on its own and you can still gain quality lean muscle mass without the added water retention or possible fat gain/retention. Remember, it is a DHT derivative, so it can't be aromatized into estradiol which causes all the fluid retention, gynecomastia or the doughy muscles.


The question is, what is the best compound to stack with BioPrimo® to maximize muscle development while cutting fat and avoiding water retention?

Testosterone is the common answer, with an anabolic and androgenic rating of 100, it is truly a powerful compound; but, more importantly, testosterone use, especially in the world of Sports and Bodybuilding, can cause severe consequences when misused – which is most often the case. And even with a moderate dosage, it can still produce Testosterone shutdown with prolonged supplementation. Other side effects include:


  • acne
  • pain and swelling at injection site
  • hair growth
  • gynecomastia (breast enlargement)
  • more frequent erections
  • erections that last longer than normal
  • mood swings
  • headache
  • decrease in sperm count when the drug is used at high doses  


Thus far, you got to know the significance of testosterone and its effect on male physiology. You've also discovered that, while Testosterone is a potent hormone to fast-track your muscle-building goals and enhance your athletic prowess, there is solid evidence that Test users are vulnerable to serious health consequences.
The Scientific community has come up with a new class of investigational compounds known as Selective Androgen Receptor Modulators, or SARMs, that provide the same benefits as testosterone without the negative side effects. These novel compounds are highly selective, interacting only with the androgen receptors of muscles, bones, and other musculoskeletal connective tissues. This explains why SARMs have no negative effects on the liver, prostate, or heart – organs that are commonly harmed when using synthetic anabolics or steroids.


Tight® (RAD 140)


When it comes to increasing muscle mass, RAD140, also known as Testolone or Tight®, has quickly become a favorite among bodybuilders, athletes, and physique enthusiasts because it is one of the strongest SARMs available and is comparable to the strong androgenic effects of testosterone and dihydrotestosterone.

It is also currently integrated  to alternative to hormone replacement therapies in men with low hormone problems, and a popular staple among professional bodybuilders, and athletes who want to improve their performance. The main reason is that you get the effects of a testosterone boost without the risks of developing benign prostatic hypertrophy, heart problems and the shutdown of your endogenous testosterone production.  

We've established that RAD-140 has anabolic, muscle-building, and power-boosting properties that are nearly identical to testosterone. Because of its impressive safety profile, other seasoned bodybuilders and athletes would stack RAD 140 with Primobolan enanthate and a Testosterone ester to bolster the effects of testosterone and other AAS without incurring any side effects. This is a proven stacking technique you can adopt before a competitive event.  

And just like testosterone's ability to improve spatial cognition and working memory, I'd like to highlight RAD- 140's neuroprotective properties. Many studies showed how testosterone plays an important role in a person’s focus and motivation. Tight® (RAD 140) has been shown to improve memory, reduce amyloid-beta buildup, and increase brain cell growth, sustaining the efficient firing of neurons for mental acuity and alertness. A separate research also demonstrated that both Tight® (RAD 140) and testosterone were equally effective in protecting the brain against neurotoxins.


Our Elite Recommendation for Significant Results (with minimal to no side effects)


BioPrimo® (Primobolan)

Tight® (RAD 140)


.5 ml 2x/wk (MTh)

1ml once a day


.25 ml 2x/wk (MTh)

.5 ml once a day




Anabolic steroids are not dangerous when used in moderation and under medical supervision.

However, as with any artificial supplement, they can be dangerous or even fatal if used in excess or for an extended period of time.
Before you add steroids to your workout routine or simply want to increase muscle mass, consult with a doctor. AAS and other anabolic compounds produce the best results when the dosage is customized for your body by a medical professional.