Mastolab-100 by 7Lab Pharma – Fast-Acting Drostanolone Propionate for Lean Muscle and Definition

Brand: 7Lab Pharma, Switzerland

Substance: Drostanolone Propionate

Action of the Drug

Mastolab-100 is a fast-acting anabolic steroid that promotes lean muscle growth, hardness, and improved vascularity. It helps preserve muscle mass while reducing water retention and fat, making it ideal for cutting cycles.

Use in Sports

Widely used in bodybuilding, physique competitions, and strength sports to achieve dense, defined muscles and enhanced muscular separation during cutting phases.

Period of Drug Withdrawal

Drostanolone Propionate clears the system within 4-6 days after the last injection, allowing timely planning for PCT or competition preparation.

Rate of Suppression of Natural Testosterone Production

Mastolab-100 moderately suppresses natural testosterone production; post-cycle therapy is recommended to restore normal hormonal function.

What Should Be Used During and After Use

During use:

• Aromatase inhibitors if stacked with aromatizable testosterone
• Regular blood work to monitor hormone levels

After use:

• Clomid or Nolvadex for PCT
• Natural testosterone boosters (DAA, Zinc)

Combinations with Other Anabolic and Androgenic Drugs

Mastolab-100 stacks effectively with:

• Testosterone Propionate or Enanthate for cutting or mild bulking
• Trenbolone or Winstrol for enhanced definition
• Primobolan for lean muscle preservation

Possible Side Effects and How to Avoid Them

• Androgenic effects (acne, hair loss, aggression) – dose-dependent
• Minimal estrogenic effects – rarely requires AIs
• Injection site irritation – rotate injection sites
• Testosterone suppression – follow with proper PCT

Why We Recommend It

Our team recommends Mastolab-100 for athletes aiming for hard, lean gains with minimal water retention. It's ideal for cutting cycles and achieving defined muscle appearance without bulk.

Comparison with Other Drugs

Compared to Masteron Enanthate, Propionate acts faster and clears the body quicker, allowing more precise cycle control and shorter post-cycle recovery.

Main Properties

• Drying – Fat Loss: Preserves lean mass and enhances muscle definition
• Growth of Mass-Strength: Supports lean, hard muscle growth with strength improvements

Mastolab-100 is a reliable choice for athletes focused on definition, lean mass preservation, and clean cutting cycles.