Testosterone cypionate is a long-acting version of the parent
hormone testosterone with an attached cypionate ester to delay its
release into the body. Testosterone is the most potent, naturally
occurring androgen that is formed in the human body. It is
responsible for characteristics specific to males and their sexual
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.
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.
Overall, the most common effect reported by subjects using
Testosterone Cypionate was gains in strength (1). Alterations in
size, shape, and appearance of the muscle were reported (2).
The degree of effects typically experienced with Testosterone use
depends on dosage. Generally, the higher the dose used, the better
the results, yet more potential for side effects due to higher
amounts of androgens in the body. (3). Its been suggested strongly
through studies, that doses as high as 600 mg per week produce
greater results verses those who received lower doses. At the
highest dose, (600 mg/week), the best results were achieved. At
this dosage, results reported were: fat loss, muscle growth,
lowered HDL cholesterol and increased size and strength (4). There
was (roughly) a 15% gain in Lean Body Mass achieved through 20
weeks of 600 mg/week of Testosterone therapy.