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HomeCompoundsMasteron Propionate

Masteron Propionate (Mast P)

Injectable steroid

Mast P · Drostanolone Propionate

Masteron Propionate = short ester, fast effects. Ideal for the last 4-6 weeks before competition. EOD injection. Almost identical profile to the Enanthate but with faster peaks and finer control.

Half-life

2–3 jours

Detection

3 semaines

Anabolic ratio

62

Androgenic ratio

25

InjectablePCT required

Dosages

Beginner200–300 mg/sem
Intermediate300–400 mg/sem
Advanced400–600 mg/sem
Female50-75 mg/week (virilization risk)

Frequency : EOD

Effects

  • Hardness
  • Vascularity
  • Estrogen control (anti-E2 properties)
  • Libido ++
  • Cutting

Side effects

  • Hair loss (if DHT-prone)
  • Acne
  • Mild aggression
  • HPTA shutdown

Support supplements

Finasteride (if hair loss, but mind the side effects)Omega-3TUDCA

Synergies & stacks

TestosteroneTrenboloneWinstrolAnavar

Avoid

  • DHT-sensitive users prone to alopecia
  • BF > 15% (reduced aesthetic effects)

AnaProtoKol is a health and performance tracking tool. This information is provided for educational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any protocol.

Sources

Studies and scientific publications this guide relies on.

  1. Chowdhury MS, Banks AJ, Bond WH, et al. (1976). A comparison of drostanolone propionate (Masteril) and nandrolone decanoate (Deca-durabolin) in the treatment of breast carcinoma. Clinical Oncology. pmid: 1036981

    Essai contrôlé comparatif chez patientes en cancer du sein avancé : drostanolone propionate IM 100 mg 3×/sem montre une activité antitumorale palliative significative et un profil de tolérance globalement comparable à la nandrolone décanoate — démonstration historique de l'activité clinique du composé.

  2. Saartok T, Dahlberg E, Gustafsson JA (1984). Relative binding affinity of anabolic-androgenic steroids: comparison of the binding to the androgen receptors in skeletal muscle and in prostate, as well as to sex hormone-binding globulin. Endocrinology. doi: 10.1210/endo-114-6-2100

    Étude de référence : la drostanolone (dérivé 2α-méthyl-DHT) montre une affinité modérée au récepteur androgène et une forte liaison à la SHBG, ce qui augmente la testostérone libre — base mécanistique du callout « masteron déplace la testostérone de la SHBG ».

  3. Kicman AT (2008). Pharmacology of anabolic steroids. British Journal of Pharmacology. doi: 10.1038/bjp.2008.165

    Revue de pharmacologie : le drostanolone (5α-réduit DHT-dérivé) n'est pas substrat de l'aromatase, présente une activité anti-œstrogénique au niveau du tissu mammaire — d'où son usage historique en oncologie mammaire — et un effet « dur, sec » caractéristique en bodybuilding.

  4. Pope HG Jr, Wood RI, Rogol A, et al. (2014). Adverse health consequences of performance-enhancing drugs: an Endocrine Society scientific statement. Endocrine Reviews. doi: 10.1210/er.2013-1058

    Énoncé Endocrine Society : les dérivés DHT (masteron, primobolan, anavar, winstrol) ne s'aromatisent pas mais conservent une activité androgénique cutanée et capillaire — risque d'alopécie androgénétique et d'acné chez prédisposés, sans bénéfice du finastéride (composé déjà 5α-réduit).

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AnaProtoKol is a health and performance tracking tool. This information is provided for educational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any protocol.