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Molecular structurePubMed
injectableandrogen
Testosterone Propionate
Test PProp
100
Anabolic Ratio
100
Androgenic Ratio
2d
Half-Life
Short-ester testosterone requiring every-other-day (EOD) or even daily injections. Faster onset, shorter clearance time — popular for shorter cycles or pre-contest use.
Mechanism of Action
Identical mechanism to other testosterone esters. The propionate ester releases testosterone rapidly after injection, producing quicker peak levels but requiring more frequent dosing.
Typical Dosing
200 mg
low / week
400 mg
moderate / week
700 mg
high / week
⚠ Warning Flags
- •Requires frequent EOD injections — injection site irritation common
Effect Profile
Muscle Protein Synthesis7High
Nitrogen Retention7High
Strength Gains7High
Red Blood Cell Production5Moderate
Fat Loss5Moderate
Glycogen Storage6Moderate
Recovery Speed7High
Collagen Synthesis5Moderate
Side Effect Profile
Hormonal Suppression8Very High
Estrogenic Effects5Moderate
Androgenic Effects6Moderate
Cardiovascular Strain5Moderate
Liver Stress1Minimal
Insulin Resistance2Minimal
Mood Changes5Moderate
Prostate Risk5Moderate
Research Studies
Effects of androgenic-anabolic steroids in athletes
Hartgens F, Kuipers H. · 2004
Comprehensive review confirming testosterone propionate's efficacy for strength (+5–20%) and lean mass (+2–5 kg) gains across multiple short-cycle studies.