GP Mast 200


Manufacturer: Geneza Pharmaceuticals
Substance: Drostanolone Enanthate 150 mg,
Drostanolone Propionate 50 mg
Package: 10 mL vial (200 mg/mL)



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GP Mast 200 by Geneza Pharmaceuticals is an injectable steroid which contains a blend of Drostanolone Enanthate and Drostanolone Propionate hormones. GP Mast 200 combines the fast-acting Propionate form with the longer acting Enanthate form. Each GP Mast 200 10ml multidose Vial contains :

  • 50 mg/ml Drostanolone Propionate.
  • 150 mg/ml Drostanolone Enanthate.

GP Mast 200 is used by bodybuilders who are in the cutting phase of training and dieting. While only mildly anabolic, this steroid extremely androgenic and because of this, brings about a very pronounced amount of hardness and definition to the muscles. On top of this, GP Mast 200 is also noted as being an effective estrogen blocker, and also binds to SHBG, making it possible for other steroids being used to bind more easily to their respective receptors, thus making their presence in the body much more effective.


Bodybuilders looking to incorporate GP Mast 200 into a cycle might stack it with other steroids such as Trenbolones (GP Tren Hex 100, GP Tren Acetate 100, GP Tren Enanth 200), GP Test Prop 100, and oral compounds such as GP Stan 10 (Stanozolol) or GP Halotest (Halotestin) to bring about an even more pronounced amount of definition and hardness leading up to a contest.

Common androgenic side effects are possible with GP Mast 200, such as oily skin and increased libido. Due to its extremely androgenic properties, this drug is not a favorite among women bodybuilders, although most serious competitors still choose to use GP Mast 200 due to its effectiveness as a pre-contest drug. Males typically use a dosage of this steroid ranging from 300-600 mg/week while women typically prefer a dosage range of 100-300 mg/week. This drug is often injected once every 2-3 days to help maintain consistent blood levels.

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