Background
Testosterone was first synthesized by being isolated from bulls’ testicles in 1935. Many pharmaceutical forms and derivatives have been created since.
Testosterone Phenylpropionate was originally manufactured by the Sicomed Pharmaceutical house under the brand name, “Testolent.” For many years, Testosterone Phenylpropionate was difficult to obtain but has recently been made more available by underground labs.

Steroid Action
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 sex 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).

There are many possible side-effects associated with the use of Testosterone Phenylpropionate. This product also has a high level of aromatization into estrogen and coverts to DHT (dihydrotestosterone) as well. Conversion to estrogen, the female sex hormone, creates a high risk of gynecomastia (formation of breast tissue in males) and water retention.

Supplementing Testosterone into your body will result in the shutting down of the body’s natural production of the hormone. The severity of side effects depend mostly on the dose and duration of circulating free testosterone and its conversion to substrates. Testosterone’s anabolic/androgenic effects are dependant upon dosage, therefore, the higher the dose the higher the muscle building effect. Testosterone also promotes aggressive and dominant behavior.
Testosterone is possibly the best mass builder known to man and recommended as the base of any mass building cycle.

Technical Data
Testosterone’s anabolic/androgenic effects are dependant upon the dose administered; usually the higher the dose, the better the results (1). In a study done on Testosterone (Enanthate), a dose as high as 600 mg’s (per week) produced better results in subjects compared to those who received lower doses. At the highest dose, 600 mg/week, the greatest results were achieved in comparison to any of the lower doses studied. The highest fat loss, most muscle growth, and increased size and strength were achieved at the higher dose (2). In the same study, HDL cholesterol was lowered and the subjects experienced acne. There was roughly a 15% gain in Lean Body Mass from 20 weeks of 600 mg/week of Testosterone therapy.

Overall, the most common report by subjects using Testosterone Phenylpropionate was immense gains in strength (3) as well as alterations in size, shape, and appearance of the muscle (4).

Due to stimulation of the Androgen Receptors (either directly or as DHT), accelerated muscle gain, fat loss, increased muscle repair and growth was experienced (5),(6). Testosterone binds to the A.R. on fat cells; therefore, adipose (fat) tissue can be broken down more readily while new fat formation is prevented (7). Since the body is building muscle at an accelerated rate, more ingested food is shuttled directly to the muscle tissue (this is known as nutrient portioning) and away from fat. This is another indirect effect of testosterone on fat loss. Testosterone also promotes glycogen synthesis, which is activated by insulin in response to high glucose levels (8). Glycogen provides fuel to the muscle; therefore endurance and strength increases were reported during severe muscle breakdown in intense training and workouts.