Masteron (Drostanolone Propionate)
A profile on the classic pre-contest hardener, known for its anti-estrogenic properties and cosmetic finish.
Masteron (Drostanolone Propionate)
Masteron (Mast Prop) is the original and most common form of Drostanolone. It was historically used to treat breast cancer due to its anti-estrogenic properties before being adopted by bodybuilders as a premier cutting agent.
It is a fast-acting DHT derivative that excels at removing subcutaneous water and giving the physique a "hard," chiseled look.
Quick Specs
| Property | Value |
|---|---|
| Active Compound | Drostanolone |
| Half-Life | ~2.5 Days |
| Detection Time | ~3 Weeks |
| Anabolic/Androgenic Ratio | 62 : 25 (Functionally much more androgenic) |
| Chemical Family | DHT Derivative |
| Administration | Injectable (IM) |
Mechanism of Action
Drostanolone is Dihydrotestosterone with a 2-alpha-methyl group. This modification prevents it from being metabolized by the 3-hydroxysteroid dehydrogenase enzyme in skeletal muscle (unlike Proviron), allowing it to actually have an anabolic effect, though mild.
It binds strongly to the Androgen Receptor and has a negative affinity for the Aromatase enzyme.
Pharmacokinetics & Dosing
Half-Life: ~2.5 Days
- Frequency: Every Other Day (EOD) is standard.
- Purpose: Typically used in the final 6-10 weeks of contest prep or a summer cutting cycle.
Primary Effects
1. Cosmetic Finish
Masteron pulls water from under the skin, enhancing vascularity and striations. It shines when the user is already lean.
2. Strength Maintenance
It helps maintain strength while in a caloric deficit via CNS stimulation (high androgenicity).
3. Anti-Estrogen
It can lower the need for ancillary AIs (like Arimidex) when running moderate doses of Testosterone.
Side Effects & Harm Reduction
Use Case:
Body Fat Requirement: If you are over 15% body fat, Masteron is largely a waste of money. Its primary benefits are cosmetic hardening, which cannot be seen under a layer of fat.
1. Aggression / CNS Stimulation
As a short-ester androgen, it hits the system fast and can increase aggression and drive (useful for workouts, potentially bad for relationships).
2. Hair Line
Devastating to the hairline for those prone to MPB.
3. Injection Pain
Propionate esters can sometimes cause PIP (Post Injection Pain), though usually less than Test Prop.
Tracking Masteron Propionate
Using the Anabolic Tracker app:
- Inventory: Add Masteron (Drostanolone Propionate).
- Scheduling: Every Other Day.
- Site Rotation: Essential due to frequency. Use the visual body map to find fresh spots.
- Metrics: Track Body Fat % visually.
Disclaimer:
This guide is for informational purposes only. Masteron is a controlled substance. Misuse can lead to permanent health damage.