Megagrisevit-Mono (Clostebol Acetate)

ALTERNATIVE STEROID NAMES: Megagrisevit, Megagrisevit-Mono, Clostebol, Clostebol Acetate
ACTIVE SUBSTANCE: Clostebol Acetate
Strength Gains: Strength gains 1/10
Mass & Weight Gains: Mass & Weight gains 1/10
Fat Burning: Fat burning 0/10
Cutting/Definition: Definition gains 2/10
Side Effects: Side effects 1/10
Ability to keep Gains: Ability to keep gains 4/10
Usual dosages: 10 – 20 mg per day
Detection time: NA
Best combined with:
Bulking: NA
Cutting: NA
Beginner Use: Use for beginners 3/10
Female Use: Female use 5/10
Pros: Low side effects.
Cons: Low effect, hard to find, daily 3 ml injections.


Megagrisevit-Mono is a rare german made steroid. Due to it’s weakness it is rarely used in bodybuilding. Usual dosage would be 10-20 mg injected every day.


Megagrisevit-Mono is the Germany trade name for the anabolic steroid clostebol acetate, a derivative of testosterone (most specifically 4 chloro-testosterone acetate). This compound is prepared in both injectable and oral form, the injectable (made only in Germany) being the preferred form of administration due to higher bio availability and easier use. In this product 10 mg of steroid is contained in 1.5 ml of solution (in a multi-dose vial), accompanied by a 1.5 ml glass ampule of B vitamins. The vitamins may prove useful for appetite/energy stimulation. but is best put aside for a latter date (too much injection volume).

The action of Megagrisevit-Mono is that of a low strength anabolic, with minimal androgenic potency. While side effects are possible with any anabolic/androgenic steroid, this compound overall is extremely mild. Due to 4-chloro substitution in the A ring this form of testosterone additionally does not aromatize, so there is little worry of developing noticeable water retention or gynecomastia during use. The substance is also not c-17 alpha alkylated, so those experimenting with the oral need not fear liver toxicity. The hydrogen substitution at the 4 position does not greatly enhance the oral efficacy of this drug however, and therefore the injectable is much more potent on a milligram for milligram basis.

As mentioned, the androgenic activity of this steroid is also very low. Related side effects such as oily skin, acne, body/facial hair growth and male pattern hair loss are therefore not commonly associated with use unless higher doses than normal of the drug are taken. Likewise Women have little risk of developing virilization symptoms provided they remain reasonable with the dosage. The fact that Megagrisevit-Mono is commonly used in German medicine with geriatric patients makes clear the real mildness of this anabolic. The side effects of anabolic/androgenic steroid use seem to become much more pronounced in patients as they age, so typically very weak androgens are shown to be the most tolerable in such cases. Although a derivative of the potent androgen testosterone, clostebol is certainly far removed from its parent in action.

The anabolic effect of this drug is also very weak, so Megagrisevit-Mono is really only utilized in combination with other steroids. The general application is to use it for contest preparations with other non-aromatizing anabolics such as Winstrol or oxandrolone. Here a daily dose of 20 mg (2 vials) Megagrisevit-Mono added in with an average dose (20-30 mg) of the oral anabolic should provide the user a nice muscle building effect without any water retention. Here the effect of clostebol would be somewhat similar to that seen with the old Primobolan acetate ampules, although Megagrisevit-Mono is admittedly weaker in effect (injectable Primobolan acetate being a sorely missed product). We could also use this compound in addition with strong non-aromatizing androgens such as trenbolone, Halotestin or Proviron. Here the result can be an even more pronounced effect of muscle definition, although this will be accompanied by a much stronger set of side effects. As discussed women will also find this drug favorable, of course here a lower dosage would apply. This would perhaps mean using more than one 10 mg vial per day (1.5 ml), perhaps even every other day to help avoid any buildup of steroid in the blood.

Overall we can say that while this compound can provide benefit to many cycles, it’s effect is clearly too weak to warrant using it alone. This however will be a moot point for most readers, as Megagrisevit-Mono is not even common on the European black market (it is likewise extremely rare in the US). On the off instance it is located one could assume it to be real, as no counterfeits are currently known to exist. With the low demand of this compound it is doubtful that an underground organization would want to invest in duplicating it.

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