GP Prima 100


Manufacturer: Geneza Pharmaceuticals
Substance: Methenolone Enanthate
Package: 10 mL vial (100 mg/mL)



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GP Prima 100 is an injectable steroid produced by Geneza Pharmaceuticals containing 100 mg/ml of the hormone Methenelone attatched to the Enanthate ester and available in a 10 ml multi dose vial.

GP Prima 100 is a very popular steroid amongst bodybuilders who are in the cutting phase of their training and dieting. This steroid is very mild in its nature and seems to work exceptionally well with calorie restricted diets. Bodybuilders with reasonably low bodyfat will notice an increase in definition and lean muscle mass.

Methenolone Enanthate is a DHT based anabolic steroid, known under the brand name of Primo. When it interacts with the aromatase enzyme it does not form any estrogens. It is used by people who are very succeptible to estrogenic side effects, having lower estrogenic properties than Nandrolone. The injection is naturally regarded as having a higher bioavailability. Its an enanthate ester which is quite long-acting. Because it by-passes hepatic breakdown on the first pass, it also has a higher survival rate. Arnold Schwarzenegger is rumored to have introduced Methenolone to the American bodybuilding community.


GP Prima 100 is considered one of the safer steroids, meaning it has a very little side effects. GP Prima 100 will not aromatize in the body, therefore estrogenic side effects such as bloat should not be a concern and its effects on cholesterol levels are minimal. In doses of 200 mg or less blood pressure is rarely altered. However effects may vary from person to person. Individual results depends on doses and tolereance.

GP Prima 100 is also not overly suppressive of the HPTA axis, although how suppressive is debatable. For this reason, many bodybuilders use it in between steroid cycles during their “off-time” to help maintain their gains and strength. The long term safety of such a practice possibly dangerous and can lead to permanent suppression of the HPTA.


Bodybuilders looking to use GP Prima 100 in a cycle might stack it with a low dose of a Testosterone (GP Test Cyp 250 or GP Test Enanth 250) and an oral such as GP Stan 10 or GP Oxan. GP Prima 100 is also a very popular steroid with women bodybuilders. Possibly one of the safer anabolic steroids for females due to very low androgenic effects in short term usage, where its mild nature makes it a very safe choice for women to use. Male bodybuilders often use GP Prima in a dose of 300-800 mg a week, while women find that a dosage 50-100 mg will generally yield desirable results.

GP Prima 100 in doses of 200 mg or less rarely alteres blood pressure. However effects may vary from person to person. Individual results depends on doses and tolereance.

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