Background
Testosterone was first synthesized in 1935. Many pharmaceutical forms have been created since. Most major pharmaceutical houses such as Organon and UpJohn, manufacture Testosterone Cypionate, as do many underground labs.

Steroid Action
When this long-acting version of testosterone is injected, it becomes stored in what is known as a depot in the body, and slowly released over a short period of time. Peaking within 1-2 days after injection, the testosterone is then steadily released over the next 12 days and completely tapers out after approximately 3 weeks.

Testosterone is responsible for promoting health and well being through enhanced libido, energy, immunity, increased fat loss, gaining and maintaining lean muscle mass, preventing Osteoporosis (loss of bone density), and possible protection against heart disease. Testosterone is also responsible for normal growth and development of male sex organs and maintenance of secondary sex characteristics. Secondary s ex characteristics are specific traits that separate the two sexes, but are not directly part of the reproductive system, for example: chest and facial hair, a distinguished jaw line, broad shoulders and increased muscle mass. Testosterone binds to the Androgen Receptors (AR), which thus causes accelerated muscle gain, fat loss, and muscle repair and growth. These mechanisms are stimulated by activation of the Androgen Receptors (either directly or as DHT), as well as through a hormonal cascade.

There are many possible side effects associated with the use of Testosterone Cypionate. This product has a high level of aromatization into estrogen and coverts to DHT (dihydrotestosterone) as well. Estrogen is the female sex hormone, and too much of it can cause a high risk of gynecomastia (formation of breast tissue in males), water retention, and other undesirable side effects. DHT can cause male pattern baldness as well as acne.

Also, supplementing Testosterone to your body will result in the shutting down of the body’s natural production of the hormone. The severity of side effects depends mostly on the levels and duration of circulating free testosterone as well as its conversion into other hormones. Testosterone’s anabolic/androgenic effects (as well as side effects) are dependant upon dosage, and the higher the dose the higher the muscle building effect.

Testosterone Cypionate is one of the best mass building anabolics known to man and is a highly recommended as the base of any mass building cycle. An effective dose of this drug for a man is between 200-2000 mg per week. An effective dose for a woman (wanting to become a man) is similar. Other women (i.e. those not wanting to become a man) should avoid this compound.