Classification: Anabolic-androgenic steroid

Active substance: Testosterone

Half-life: approximately 5 days

Detection period: approximately 3 months

Dosage: 250-1000mg / week

Aromatisation: Yes

Reduction: Yes

HPTA blocking: Yes


For a long time testosterone cypionate has been a very popular steroid among American athletes. While enanthate is produced worldwide, cypionate is practically exclusively in the USA. There is a common opinion among local players that cypionate gives a slightly greater “kick” than enanthate, but causes a slightly more pronounced retention of water. However, looking at this issue completely objectively, cypionate shows properties very similar to enanthate, they are actually substitutes. Both preparations are long-acting testosterone esters, in an oily solution that maintains high testosterone levels in the blood for about 2 weeks. However, enanthate may be slightly more effective in releasing the hormone, due to the fact that it is 1 carbon atom lighter than cypionate (remember that the ester is included in the total, milligram weight of the agent). Even so, cypionate has become the most popular testosterone ester available on the US black market. It is worth noting that testosterone is the oldest steroid. Since its invention, many other steroids have become available, and yet testosterone is still considered to be the best muscle mass builder.




Like all injectable testosterones, cypionate provides significant gains in muscle mass and strength during the cycle. Testosterone easily converts to oestrogen, hence the muscle mass gained on it may not be of the best quality due to water retention. Therefore, cypionate is not the best means during periods of work on the definition, before competitions. In addition, excess oestrogen can cause the development of gynaecomastia. As soon as the user notices itching or the appearance of a lump under the nipples, he should start using Nolvadex immediately. An even better solution will be an aromatase inhibitor used from the beginning of the cycle. Nolvadex and/or Proviron are probably enough for people without a predisposition to experience side effects typical of estrogens.


Testosterone cypionate remains active in the body for 2 weeks, although the injection is given once or twice a week. This allows to maintain a stable concentration of the agent in the blood. 250 mg to 800 mg per week will be sufficient. Taking a dose above 1000 mg of cypionate per week is not necessary, on the contrary. Such large amounts without the use of IA will cause a very clear water retention, contribute to the complete loss of muscle definition. Other side effects are then also highly likely. Moreover, such a high dosage is unprofitable (price / effectiveness ratio). Stacks with oral agents such as Dianabol and Anadrol are often used. On the other hand, players who care more about the quality of gained mass will combine it with injectable anabolics – Deca-Durabolin or Equipoise. In most cases, combining testosterone with another AAS lowers its required, effective doses.