Comparing Testosterone Cypionate vs. Enanthate

Many healthcare providers regard testosterone cypionate and testosterone enanthate as interchangeable, but each has differences in their ingredients and duration of action. These differences influence how the injectable drugs are delivered, the conditions they can treat, and who can and cannot use them.

Testosterone cypionate (sold under the brand name Depo-Testosterone) and testosterone enanthate (sold under the brand name Xyosted and others) are modified forms of testosterone used primarily to treat male hypogonadism (low testosterone).1

While similar in action, both have slight differences in their molecular structure—testosterone cypionate has eight carbon atoms while testosterone enanthate has seven—which affects how the drugs are absorbed and metabolized (broken down) by the body.23

The biggest difference is the carrier oil each is made with. This can affect the rate of absorption in tissues and how the drugs are administered.

Differences in molecular structure also affect how quickly testosterone cypionate and testosterone enanthate are metabolized and remain active in the body. This is described by the drug half-life, meaning the time it takes for drug concentrations to drop by 50% after the initial dose.