Anabolic Steroids

Primobolan – Methenolone

Primobolan containing the main substance Methenolone is a very effective anabolic steroid. That’s despite its weakness on the paper. The compound is considered fairly weak and mild because the numbers on paper in terms of anabolic : androgenic ratings are low. Nonetheless, this shouldn’t fool you. Primobolan (Methenolone) must be respected as a very effective steroid.

In fact, Primobolan (Primo) is considered among the most popular injectable steroids for cutting purposes. Trenbolone may be the only injectable that may be more popular for cutting purposes.


Primobolan is so popular because it is considered very effective and rather safe. In addition to that, Primo used to be one of the favorite anabolic steroids to old school bodybuilders. It was mostly used for cutting cycles, of course, but is sometimes added in bulking ones too.

  • PS: Primobolan (Methenolone) was also highly favored by Arnold Schwarzenegger too.

Primobolan Profile (Methenolone)

Primo is far from the most powerful steroids but is still more powerful than Masteron. Anyway, this makes it a poor choice for growing muscle mass.

That’s why, if Primo is added to the bulking cycle, then only alongside other bulking steroids. Yet, Primobolan gained huge popularity as a cutting steroid. One of the reasons is because Methenolone is having a huge advantage compared to other steroids. It has a very strong binding affinity to androgen receptors.


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Methenolone is a dihydrotestosterone (DHT) derived steroid and as you can guess – it doesn’t aromatize. Therefore, you do not need an AI or SERM to use with Primo. And is also an amazing compound for aiding fat loss and keeping muscles during low calorie diets.

Methenolone is amazing at increasing nitrogen retention. So it is not very anabolic (not going to grow too many muscles) but is anti catabolic so won’t allow you to lose muscles. That’s in the time that you burn fat. Plus, as mentioned, Methenolone doesn’t aromatize (in fact, it can help deal with some aromatization) – back in the days, it was used as an anti gyno compound.

In short, Primobolan won’t allow you to lose muscles during low calorie diets. That’s while would greatly boost the efficiency of other steroids. And lastly is going to help reduce some estrogen too. You get a much harder appearance with more muscles that are drier and less body fat.


Primobolan Injection Vs Oral

Primobolan can be referred to as both an injectable and oral version.

Methenolone Enanthate is the injectable version of Primo and Methenolone Acetate is the oral version.

Despite the fact that it is easier to use oral tablets, most people still prefer injectables. So injection Primobolan is most popular.

That’s because injection has a very long half life (7-10 days) while oral has half life of only about 4-6 hours. Plus to that, you need higher doses of oral Primo to make it effective. But oral Primo is hepatotoxic.

Primobolan Side Effects

The side effects of Primobolan are no different from other steroids. However, since Primobolan is safer – the side effects are milder if they occur and have fewer chances of occurrence.

  • Oral Primobolan (Methenolone Acetate) is liver stressful but the injectable version (Methenolone Enanthate) is safe for your liver.

None of them would cause estrogenic related issues (in fact, the steroid may help reduce them).

Androgen related issues may occur but they are not as bad as with other steroids. However, you may still expect hair loss, acne, oily skin, etc.

Testosterone suppression for men and virilizing side effects for women, as with any steroids out there – poses some risks.

That’s why women shouldn’t go for an injectable version (takes too much to get out of the system in case something goes wrong) and men should always implement a PCT plan after a Primo cycle.

Primobolan Dosage

  • Oral Primobolan dosage ranges between 50 mg and 100 mg a day. Split up the total daily dose in 2 halves.
  • Injectable Primobolan dosage ranges between 500 mg and 1000 mg per week. Split up the weekly dose in 2 halves.
  • Women Primobolan dosage is 10-20 mg a day. Only oral.


Men may stack Primo with other compounds. For men, Primo stacks very well for other cutting compounds (like Tren, Winstrol) and as a base compound – Testosterone.

Women usually run it solo or with Anavar.

Primobolan Cycle


The Oral Primo cycle shouldn’t be used for longer than 8 weeks to keep your liver safe.

Injectable Primobolan cycle can be run for about 12-14 weeks.

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Example of Primobolan cycle:

Week 1-12 Testosterone Cypionate 250 mg a week; Primobolan (Methenolone Enanthate) 600 mg a week. First 6 weeks 50 mg a day of Winstrol.

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