GP Mast 100 (Masteron)


GP Mast 100 (Masteron) – Manufacturer: Geneza Pharmaceuticals Pharmaceutical name: Drostanolone Propionate Pack: 10 ml/vial (


GP Mast 100 (Drostanolone Propionate) is a synthetic derivative of Dihydrotestosterone, displaying a potent androgenic effect that is responsible for increases in muscle density and hardness and a moderate anabolic effect that creates a positive nitrogen balance in humans and promotes protein synthesis. Since it is a derivative of Dihydrotestosterone, Drostanolone does not aromatize in any dosage and thus it cannot be converted into estrogen. Therefore, estrogen-related water retention is eliminated. Since Masteron is a predominantly androgenic steroid, the athlet


Athletes rarely experience any side effects with GP Mast 100, because Masteron is not hepatoxic so liver damage is quite unlikely. High blood pressure and gynecomastia are not a problem since neither water nor salt retention occurs and the estrogen level remains low. The main problem are acne, increased aggression and a possible accelerated hair loss since Dihydrotestosterone is highly affinitive to the skin’s androgen receptors, in particular, to those on the scalp.


GP Mast 100 results in a dramatically improved hardness and sharpness of the muscles. Make a distinction here since GP Mast 100 does not automatically improve the quality of muscles in everyone. A prerequisite is that the athlete’s fat content must already be very low. In this case GP Mast 100 can then be the decisive factor between a smooth, flat muscle or a hard and ripped look. For this purpose GP Mast 100 is often only used during the last four weeks before a competition so that the muscles get the last “kick.” GP Mast 100 is especially effective in combination with steroids such as GP Stan 10 (Stanozolol), GP Tren Hex 100 (Trenbolone Hexahydrobencylcarbonate), GP Prima 100 (Methenolone Enanthate), GP Oxan (Oxandrolone) and of course GP Test Prop 100 (Testosterone Propionate). Since the substance Drostanolone Propionate is quickly broken down in the body, frequent and regular injections are necessary. This fact makes GP Mast 100 a very interesting steroid when doping tests must be passed by a negative urine analysis. Since the Drostanolone Propinate does not remain in the body very long in a sufficient, detectable amount, athletes inject the compound with great success up to two weeks before a test.


The usual dosage taken by athletes is around 100 mg three times per week. Since Masteron is not administered in excessively high dosages and the intake, at the same time, GP Mast 100 is limited to a few weeks, the compatibility for the athlete is usually very good.