Primox Biosira (Methenolone Acetate) 100tabs




Primobolan (methenolone acetate)

(Methenolone Acetate).

Primobolan is an oral anabolic steroid that is a bit unique compared to many oral anabolic steroids. Before we go any further, it’s important to distinguish between primobolan and primobolan depot. Primobolan Depo is an injectable version of the hormone that is attached to a large/long ester of enanthate. Primobolan consists of the same active steroid hormone as Methenolone; however, it is attached to a small / short ester of acetate and is intended for oral administration.

The hormone Methenolone was first released in 1962 by Squibb in both oral acetate and injectable enanthate forms. Both hormone compounds went by the name Nibal, Nibal and Nibal Depot, but were very short-lived products. In the mid-1960s, the giant German pharmaceutical company Schering obtained the rights to the hormone Methenolone, introducing it under the name Primobolan. Since then, Primobolan has been known as the European anabolic steroid. It has never been manufactured in the United States since Squibb’s time.


An interesting note regarding methenolone acetate compound, although primarily an oral steroid, Schering once produced it as an injectable. However, the injectable version was discontinued in 1993. Any injectable form of acetate will be strictly found in clandestine labs, but even then it will be rare. Most clandestine labs producing the acetate version will do so in oral form. Many, however, just stick to the large depot version for injection.

Primobolan is considered one of the safest anabolic steroids on the market and has an excellent safety rating to back up this claim. In fact, this steroid has been successfully used to treat underweight and premature babies without injuries. It is also prescribed for osteoporosis and sarcopenia. However, the main purpose of Primobolan is to treat muscle atrophy and prolonged exposure to corticoid hormones. It has also proven to be extremely effective in the treatment of malnutrition.

Playing an important role in therapeutic treatment plans, primobolan is a very popular anabolic steroid among performance enhancing athletes. However, the injectable version of Depot is much more popular as the oral version has much weaker effects. For bodybuilders, the preferred form is injectable methenolone acetate, but it is very difficult to find a quality injectable acetate version. In addition, the methenolone hormone itself, although limited in oral form, is one of the most commonly counterfeited anabolic steroids. It is also quite expensive in many underground markets. This hormone is known as one of Arnold Schwarzenegger’s favourites. How much truth there is to this only he can say, but this story is enough for many to make inaccurate assumptions about his feelings about the hormone and how he used it. What we do know is this.

Important note on request; Demand for this steroid is also high due to the fact that it is very female friendly. It is one of the few anabolic steroids that women can use successfully. Steroids like Primobolan and Anavar have a very low virilisation rating, making them ideal for women to use.

Primobolone Functions and Traits:

Methenolone is a derivative of dihydrotestosterone (DHT) or, more specifically, a structurally modified form of DHT. A double bond on the first and second carbons is added to the DHT hormone, which in turn greatly increases the anabolic nature of the hormone. It also carries an added 1-methyl group that protects it from liver damage. The addition of acetate ester further protects it from being metabolised in the liver.

As an oral steroid, primobolan is one of the few oral steroids that is not a C17-alpha-alkylated (C17-aa) steroid. The lack of a standard C17-aa structure also means that oral primobolan is not toxic to the liver. However, while this is a bonus, most will find oral primobolan to be a relatively mild steroid or even a weekly steroid compared to many others in terms of performance enhancement. Men will not experience the same level of anabolic activity as many anabolic steroids. Make no mistake, Primobolan has its place in performance, but most men will find the Depot version more suitable. As for women, this meekness partly makes it a fantastic choice.

The hormone Methenolone has a number of properties similar to many other anabolic steroids. This hormone enhances protein synthesis (to some extent) and may have a moderate effect on increasing red blood cell counts. However, the steroid has three important characteristics that set it apart more than anything else. Primobolan will significantly improve nitrogen retention. This avoids a catabolic state and is also great for building muscle tissue. However, as mentioned, this steroid will not be a great size, keep that in mind. The hormone has also been shown to have an extremely strong binding affinity to the androgen receptor. Strong binding to the androgen receptor has been linked to direct lipolysis. Almost all anabolic steroids increase metabolic rate, but Primo, as it is often called, supports direct fat loss.

The last important feature of primobolan is its effect on the immune system. The hormone methenolone has been shown to significantly boost the immune system. In fact, it has been successfully used to treat AIDS patients. For such a person, not only does he or she receive an immune boost, but also direct protection from the muscle wasting disease. The same immune enhancement will be very useful for athletes enhancing performance during the drying phase.

Additional information

active substance


Amount of substance, mg


release form


1 Tablette, mg




order size

Pacchetto (100 tablets)


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