Masteron Propionate 100mg/mL is a drostanolone propionate injectable formulation in MCT oil supplied in a 10mL vial. Manufactured for consistency, stability, and research applications.
Format10mL Vial
Concentration100mg/mL
CarrierMCT Oil
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Drostanolone Propionate, widely known by its pharmaceutical brand name Masteron, is a short acting anabolic compound derived from dihydrotestosterone (DHT) with a pharmacological profile that distinguishes it meaningfully from most other injectable anabolic compounds in research. CSD’s formulation delivers 100mg/mL in a 10mL multi dose vial using MCT (medium chain triglyceride) oil as the carrier base. A well suited pairing for a short acting compound requiring every other day administration, where MCT oil’s ultra low viscosity minimizes injection site discomfort across the frequent administration schedule that propionate ester protocols demand.
The propionate ester gives Masteron a half life of approximately 2–3 days, requiring every other day administration in documented research protocols to maintain stable blood concentration levels; an administration frequency shared with other propionate and acetate ester compounds like Testosterone Propionate and Trenbolone Acetate. This short active window demands greater logistical commitment than long acting ester alternatives but offers researchers precise control over compound levels and fast clearance upon discontinuation, making it well suited to protocols where adjustability is a priority variable.
Masteron’s most distinctive research characteristic is its interaction with estrogen at the receptor level. As a DHT derived compound it does not aromatize, but beyond simply not converting to estrogen, Drostanolone has documented activity as an aromatase inhibitor directly competing with aromatase enzyme binding and reducing estrogenic conversion from other compounds present in the research environment. This anti estrogenic mechanism makes Masteron a uniquely positioned compound in androgen research, studied not only for its anabolic activity but for its role in modulating estrogenic activity within combined compound protocols. A research characteristic shared with no other injectable anabolic compound in CSD’s range.
Every batch of CSD’s Masteron Propionate is third party lab tested for concentration accuracy and purity prior to release, with COA documentation available on request. Canada Steroid Depot has supplied Canadian customers with consistently verified, accurately dosed compounds for years, and Masteron Propionate is a consistently sought after product across our injectable anabolic range. All orders ship discreetly across Canada in plain, unmarked packaging with no identifying information on the exterior.
Store at room temperature away from direct light and heat. Do not freeze. Intended for research purposes only.
Commonly researched alongside a testosterone base compound. Browse CSD’s full injectable range and PCT compounds for complete protocol sourcing.
Masteron Propionate (Drostanolone Propionate) is the short acting ester of Drostanolone; a DHT derivative with strong androgenic properties and moderate anabolic activity. It does not aromatize to estrogen and demonstrates anti estrogenic properties through androgen receptor competition with oestrogen — making it one of the most researched compounds for cutting protocols where estrogen management and muscle hardness are priorities. Masteron Propionate is studied for its ability to harden muscle tissue, improve vascularity, reduce subcutaneous water retention, and provide anti estrogenic effects, and is most commonly researched in cutting stacks alongside Testosterone Propionate and Trenbolone Acetate.
Masteron Propionate has a half-life of 2–3 days requiring every other day administration, while Masteron Enanthate has a half-life of 8–10 days allowing twice weekly administration. The Propionate ester produces faster onset and faster clearance, making it the preferred option for shorter research cycles and cutting protocols where rapid response assessment, tighter plasma level control, and faster post cycle clearance are priorities. When stacked with other short acting esters such as Testosterone Propionate and Trenbolone Acetate in a cutting protocol, Masteron Propionate maintains pharmacokinetic consistency, all compounds can be administered on the same EOD schedule and discontinued simultaneously.
MCT oil is one of the lightest and lowest viscosity carrier oils available for injectable formulations, flowing freely through fine gauge needles at room temperature without pre warming. This is particularly relevant for Masteron Propionate given its every other day administration requirement, injection comfort becomes a significant practical consideration when administering a compound three to four times per week throughout a research cycle. The MCT carrier minimizes injection site discomfort and preparation time for each EOD administration compared to heavier traditional carriers.
Due to its 2–3 day half-life, Masteron Propionate requires every other day (EOD) administration, Monday, Wednesday, Friday, Sunday being the most common research schedule. Common research doses range from 100–150mg per injection (300–450mg per week total). At 100mg/mL, a 1mL EOD injection delivers 100mg per administration. This 10mL vial provides sufficient compound for 10 EOD injections, approximately 3 weeks of a standard EOD protocol. Multiple vials are typically required for a full cutting research cycle.
Yes! This batch has been independently HPLC tested by an accredited third party laboratory confirming concentration accuracy at 300mg/mL and compound identity as Boldenone Undecylenate. A certificate of analysis is available.
