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Mastelad 100 mg/ml (Drostanolone Propionate) 10ml vial

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  • Stock: In Stock

  • Type: VIAL

Active Ingredient: Drostanolone Propionate

Type: Anabolic Steroid (DHT Derivative)

Form: Injectable

Carrier Oil: Sesame Oil

In Stock

  Security policy

Anonymous packaging (cosmetic company)

  Delivery policy

Delivery time to EU 5 - 10 business days. Delivery time to US 7 - 14 business days.


Drostanolone, commonly known as Masteron, is a potent anabolic steroid with high androgenic and moderate anabolic effects. It does not aromatize in the body and acts as a mild aromatase inhibitor. As a derivative of dihydrotestosterone (DHT), it shares similar biological actions. While it was initially used to treat breast cancer in women, its high potential for virilization has limited its current medical applications. Drostanolone’s lack of aromatase activity means it does not convert to estradiol.

Drostanolone binds strongly to androgen receptors in muscles, the prostate, and the scalp, which can lead to side effects such as baldness, prostate enlargement, and increased body hair. As a DHT derivative, it indirectly inhibits estradiol activity, displaying anti-estrogenic properties. Athletes on cutting diets often value Drostanolone for its ability to maintain strength and motivation, counteracting the decline in strength and psychological well-being due to carbohydrate deficiency.

In bodybuilding, Drostanolone is favored for promoting muscle definition without causing fluid retention. Its mild diuretic effect helps achieve a ripped, athletic look, and its fat-burning properties can reduce fat mass by 5-10%. However, its anabolic index is lower than testosterone, increasing the risk of androgenic side effects such as aggression, acne, baldness, prostate hypertrophy, and virilization in women.


The optimal effect of Drostanolone is achieved with a weekly dosage ranging from 300-500 mg. It can also be used in hormone replacement therapy to reduce sex hormone-binding globulin (SHBG) and increase free testosterone levels. Compared to other SHBG-reducing DHT derivatives like stanozolol, Drostanolone is considered more challenging to detect in doping tests. Dosages typically range from 75-200 mg per week, depending on the intended purpose. Common dosage ranges include:

  • Beginner: 50 mg every other day (EOD)
  • Average Dosage: 100 mg EOD
  • High Dosage: 50+ mg every day (ED)


  • Increased strength and lean muscle mass
  • Improved recovery
  • Enhanced fat burning
  • No aromatization

Side Effects

  • Suppression of endogenous testosterone production
  • Reduced fertility
  • Elevated hematocrit levels
  • Increased blood pressure
  • Acne
  • Baldness
  • Adverse effects on lipid profile


  • Half-Life: 20 hours
  • Injection Frequency: Every 1-2 days

Drostanolone Propionate is formulated as an oily solution for intramuscular injection.


  • Pregnancy
  • Known or suspected prostate or breast carcinoma
  • Breastfeeding
  • Hypersensitivity to the active substance or any excipients
  • Elevated blood calcium levels

Storage Instructions

  • Keep out of reach of children
  • Store in a cool, dry place away from direct sunlight
  • Store at room temperature
  • Do not use after the expiry date