Testosterone Propionate (test prop 100mg) is a fast-acting ester of testosterone, commonly used in performance enhancement, cutting cycles, and sometimes TRT (though less common due to frequent injections).
Pros Vs. Cons
✔ Pros:
Faster results (due to quick release)
Less water retention (compared to long esters like cypionate/enanthate)
Easier to adjust/correct sides (exits system quickly)
✖ Cons:
Frequent injections (can lead to scar tissue)
More post-injection pain (PIP) due to solvent concentration
Not ideal for beginners (requires strict pinning schedule)
Common Uses
Cutting cycles (often stacked with trenbolone, masteron, or Winstrol)
Kickstarting cycles (while waiting for long esters like Test E/C to take effect)
Pre-contest prep (due to minimal water retention)
Side Effects
Androgenic: Acne, hair loss (if prone), oily skin
Estrogenic: Gynecomastia (if estrogen isn't controlled)
Injection Pain: Higher PIP than Test E/C (can be reduced with proper technique)
Injection Tips
Needle: 25G (IM) or 27–30G
Best Sites: Delts, quads, glutes (rotate frequently)
PIP Reduction: Warm oil before injection, massage afterward, or dilute with sterile oil
Comparison to Test Cypionate/Enanthate:
Feature |
Test Propionate |
Test Cypionate/Enanthate |
|---|---|---|
| Ester Length | Short (2–3 days) | Long (~7–10 days) |
| Injection Freq | EOD/Daily | 1–2x per week |
| Water Retention | Lower | Higher (due to slower release) |
| PIP | More common | Less common |
Production Overview
1. Raw Materials & Equipment Needed
Testosterone Propionate (Raw Powder) – Must be ≥99% purity (HPLC-tested).
Solvents & Carriers
Benzyl Alcohol (BA) – 1–3% (preservative, helps dissolve hormone).
Benzyl Benzoate (BB) – 10–20% (co-solvent, reduces crystallization).
Carrier Oil – Typically MCT oil, grapeseed oil, or cottonseed oil (sterile-filtered).
Equipment
Magnetic Stirrer/Hotplate – For dissolving hormone evenly.
Sterile Glass Vials & Seals – Autoclaved before use.
0.22μm Syringe Filters – For sterilization.
Syringes & Needles – For transferring solutions.
2. Step-by-Step Production Process
Step 1: Weighing & Mixing
Measure raw Testosterone Propionate (e.g., 10g for 100mL at 100mg/mL).
Add solvents:
2% BA (2mL per 100mL solution).
20% BB (20mL per 100mL solution).
Add carrier oil (e.g., MCT oil) to reach final volume (100mL).
Step 2: Heating & Dissolving
Heat mixture to 50–70°C while stirring until fully dissolved (no visible particles).
Avoid overheating (can degrade hormone).
Step 3: Sterile Filtration
Pass solution through a 0.22μm syringe filter into sterile vials.
Seal vials with crimped caps.
Step 4: Quality Testing (Optional but Recommended)
HPLC Testing – Verifies concentration and purity.
Sterility Testing – Ensures no bacterial contamination.
Particle Testing – Confirms no undissolved crystals.
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