Mastabol — Methyl Drostanolone

Pharmaceutical Form: Oral Tablets | Category: Anabolic Androgenic Steroid

Presentation

Each 10mg tablet is light blue, film-coated, round, and concave, with KF wording imprinted on one side. Supplied in plastic blister packs (3 strips × 10 tablets = 30 tablets per box). Each box comes with a 10-digit authentication code for verification.

About Mastabol

Mastabol is an anabolic androgenic steroid containing the active hormone Methyldrostanolone, a derivative of DHT (Dihydrotestosterone). It is structurally modified from Drostanolone with:

• A methyl group at the 17th carbon (C17-alpha alkylated) allowing oral bioavailability.
• An additional methyl group at the 2nd carbon, greatly enhancing its anabolic potency.

These modifications also reduce androgenicity compared to Masterbolic, making Mastabol more anabolic and less androgenic in nature.

Structural Ratings

• Anabolic rating: 400 (≈4× stronger than Masterbolic).
• Androgenic rating: 20 (very mild).
• Non-aromatizing: carries no estrogenic or progestin activity.

Effects & Benefits

• Significantly enhances protein synthesis and nitrogen retention.
• Promotes lean muscle growth or preservation during cutting phases.
• Increases red blood cell count, improving muscular endurance via better oxygen delivery.

Notes

While Mastabol is not unique compared to other anabolic steroids, its long history in the “grey market” gave it a distinctive reputation. It remains effective for supporting an anabolic environment, muscle preservation, and performance enhancement.