Description
What is Testosterone Propionate?
Testosterone Propionate (Short-acting esterified testosterone (injectable)) is a testosterone propionate ester — C₂₂H₃₂O₃, MW 344.5. The 200mg/mL high-concentration formulation provides a higher dose per mL injection volume. Rapid-onset ester with peak ~24–36h and active window ~2–3 days. Free testosterone activates the androgen receptor (AR). Aromatases to oestradiol via CYP19A1.






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