Chemical name: (2α,5α,17β)-2-Methyl-3-oxoandrostan-17-yl propanoate
Formula: C23H36O3
Anabolic activity index: 62%
Androgenic activity index: 25%
MASTABOL 100 10ml VIAL – SIS LABS
Description: Mastabol 100 by SIS Labs is an injectable anabolic steroid containing the active substance drostanolone propionate. Known for its potent androgenic and anti-estrogenic properties, Mastabol 100 is highly valued in the bodybuilding and athletic communities for its ability to enhance muscle hardness, density, and definition without significant water retention.
Key Features:
- Muscle Hardening and Definition: Mastabol 100 is renowned for its ability to promote a lean, hard, and defined physique. It is particularly popular among bodybuilders during cutting cycles, where the goal is to maintain muscle mass while reducing body fat.
- Anti-Estrogenic Effects: Drostanolone propionate has strong anti-estrogenic properties, which help prevent estrogen-related side effects such as water retention and gynecomastia. This makes it an excellent choice for athletes looking to avoid the bloated appearance often associated with other anabolic steroids.
- Enhanced Athletic Performance: Mastabol 100 can enhance athletic performance by increasing strength and endurance without significant weight gain. This is beneficial for athletes in sports where power and speed are crucial.
- Short Half-Life for Flexible Dosing: Due to its propionate ester, Mastabol 100 has a relatively short half-life, requiring frequent injections to maintain stable blood levels. This allows for flexible dosing schedules and easier management of blood hormone levels.
Dosage and Administration: The typical dosage of Mastabol 100 for male athletes ranges from 300 to 500 mg per week, divided into two to three injections. Due to its short half-life, injections are usually administered every other day or three times per week. For female athletes, a lower dosage of 50 to 100 mg per week is recommended to minimize the risk of virilization.
Precautions and Side Effects: While Mastabol 100 is generally well-tolerated, it may cause side effects in some individuals, including:
- Acne and oily skin
- Increased body hair growth
- Male pattern baldness
- Elevated cholesterol levels
- Suppression of natural testosterone production
Female athletes should use Mastabol 100 with caution due to the risk of virilization, which can include symptoms such as deepening of the voice, menstrual irregularities, and increased facial hair growth.
Conclusion: Mastabol 100 by SIS Labs is a powerful injectable anabolic steroid containing drostanolone propionate, ideal for athletes and bodybuilders aiming to achieve a lean, hard, and defined physique. Its anti-estrogenic properties and ability to enhance muscle density and performance make it a popular choice for cutting cycles and competitive preparations. As with all anabolic steroids, responsible use and adherence to recommended dosages are crucial to minimize the risk of side effects and achieve optimal results.
Spencer Holloway –
Excellent experience from beginning to end. The product arrived safely, the vial was perfectly sealed, and every injection was smooth. My muscles looked harder, leaner, and much more defined without unwanted water retention. I’ll definitely be ordering Mastabol 100 again for future cutting cycles.
Logan Prescott –
Mastabol 100 became one of my favorite additions during contest prep. The improvements in muscle density and overall conditioning were easy to notice by the fourth week. I stayed strong in the gym, recovered quickly, and never had any issues with the product. Highly recommended for experienced athletes looking for a quality compound.
Darren Whitlock –
Fantastic product that delivered exactly what I expected. I appreciated the smooth injections and consistent performance throughout the cycle. My shoulders and arms looked noticeably more defined, and I experienced very little injection discomfort. SIS Labs continues to produce dependable products that I trust.
Caleb Merrick –
This was my first experience with Mastabol 100, and I’m extremely satisfied. My physique gradually became drier, vascularity improved, and I maintained my strength despite being in a calorie deficit. Recovery between workouts was also noticeably better. The vial was securely packaged and looked very professional.
Trevor Langford –
I wanted a lower-concentration option so I could fine-tune my dosing, and Mastabol 100 worked perfectly. The oil was clean, injections were painless, and I started seeing improved muscle hardness after a few weeks. It paired well with my cutting phase, helping me maintain lean muscle while improving overall definition. Excellent quality from SIS Labs.