Mastabol 100mg – SIS Labs


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  • Drostanolone Propionate 100mg/ml


  • 10ml Sterile Multidose Vial


Mastabol 100mg, also known as Drostanolone Propionate, is a synthetic anabolic-androgenic steroid (AAS) derived from Dihydrotestosterone (DHT). It is known for its powerful androgenic properties with moderate anabolic effects. Manufactured by SIS Labs, a reputable name in the pharmaceutical industry, Mastabol 100mg is designed to help athletes achieve a lean, hard physique without the risk of water retention.

Mastabol Effects

The appeal of Mastabol lies in its unique ability to offer several key benefits to bodybuilders and fitness enthusiasts:

  • Enhanced Muscle Hardness and Definition: Due to its androgenic nature, Mastabol helps in increasing muscle density and hardness, making it a favorite during cutting phases.
  • Fat Loss: While not a direct fat-burning agent, Mastabol aids in the reduction of body fat percentages when combined with a proper diet and exercise regimen.
  • Strength Gains: Users often report significant improvements in strength, allowing for more intense and productive workouts.
  • Minimal Estrogenic Effects: Unlike some other steroids, Mastabol does not convert to estrogen, minimizing the risk of gynecomastia and water retention.

A Mastabol 100mg Cycle

A typical Mastabol cycle lasts between 6 to 10 weeks, depending on the individual’s goals and experience with AAS. For beginners, a lower dosage and shorter cycle are recommended to gauge the body’s response. It’s often stacked with other steroids like Trenbolone or Testosterone Propionate to maximize effects while minimizing side effects.


The recommended dosage of Mastabol for men is between 300mg to 400mg per week, divided into two to three injections. For female athletes, a much lower dose of up to 100mg per week is suggested due to its strong androgenic effects.

Side Effects

While Mastabol is considered safer than many steroids, potential side effects can occur, especially at higher doses:

  • Acne and hair loss due to its androgenic nature
  • Increased aggression and libido changes
  • Possible negative impacts on cholesterol levels
  • Liver toxicity is less of a concern with Mastabol compared to oral steroids, but caution is still advised.


Feedback from users typically highlights the effectiveness of Mastabol in achieving a lean, defined physique, with many noting significant improvements in muscle hardness and strength without the addition of unwanted water weight. However, experiences can vary, and it’s crucial to consider personal health and goals when evaluating user reviews.