from the BD website
Mastabol 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, dromastanolone does not aromatize at any dosage and thus it cannot be converted into estrogen. Therefore, estrogen-related water retention is eliminated. Mastabol 100 is relatively fast-actiing and fast-clearing because of the attachment of the propionate ester to the base molecule.
Anabolic steroids such as Stanabol are synthetic derivatives of the male hormone testosterone. Stanozolol has a pronounced anabolic effect with fewer masculinizing side effects than testosterone and some other synthetic anabolic steroids. Anabolic steroids are used in stimulating appetite and increasing weight gain, strength, and vigor. They should be used as a part of an overall program with other supportive and nutritional therapies.
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