Testosterone Cypionate

Testosterone cypionate is testosterone bound to a cypionate ester, which slows its release after injection so levels stay relatively stable between doses. It has been the mainstay of testosterone replacement therapy for decades. It is given by intramuscular or subcutaneous injection on a schedule a provider sets from bloodwork. Because it supplies testosterone directly, it reliably raises levels, but it also signals the body to reduce its own production and can suppress fertility, which is the trade-off against upstream options like enclomiphene. Ongoing care includes monitoring testosterone, hematocrit and PSA. A licensed provider reviews baseline labs and history; dispensed by a US-licensed pharmacy. It is stored at room temperature, since cold can crystallize the oil.