Testosterone levels typically peak after an injection depending on the type of testosterone ester used:
- Testosterone Propionate peaks within 24 to 48 hours after injection.
- Testosterone Enanthate peaks within 24 to 72 hours.
- Testosterone Cypionate peaks within 48 to 72 hours, though some sources note it can peak as early as 10 to 12 hours in some cases.
- Testosterone Undecanoate peaks around 7 days after injection.
In general, for commonly used esters like enanthate and cypionate, testosterone levels usually reach their highest point roughly 2 to 3 days (48 to 72 hours) after injection. After peaking, levels gradually decline until the next dose is administered. This timing can vary based on individual metabolism, dosage, injection method (intramuscular or subcutaneous), and injection site. Therefore, the typical peak window after a testosterone injection is about 1 to 3 days, depending on the specific formulation used.
