Testosterone Propionate is the shortest-ester testosterone steroid. It's an injectable compound with a slower rate of release than un-esterified Testosterone, but a faster rate of release than all the rest of esterified testosterone. There are some advantages and disadvantages to the short-acting ester. The major disadvantage is that users have to inject Testosterone Propionate at minimum every other day throughout the cycle to get proper results. The advantages, however, are easier control and prevention of potential side effects. Also because there is less ester per vial, there is more actual testosterone per injection, which produces better results. The Propionate ester expands Testosterone's half-life to about 4 and a half days.
Testosterone Propionate is one of the most popular anabolic steroids even today - 80 years after it's invention. It is widely used by bodybuilders and athletes for the purpose of physique and performance enhancement. Testosterone itself is considered the most natural and safest anabolic steroid a person can use. The Propionate ester is suggested for any first-time steroid user.
It can be injected into any muscle (if the muscle is big enough). The most popular being buttocks, shoulder or even triceps.
There are principally two desirable effects of Testosterone:
- physical / athletic performance enhancement (endurance, strength, faster regeneration)
- physique enhancement (muscle buildup, fat loss)
The primary side effects of Testosterone Propionate surround its ability to aromatize into Estrogen. Testosterone itself possesses a moderate level of Estrogenic activity - it holds a moderate affinity to bind to the aromatase enzyme (the enzyme responsible for the conversion of Testosterone into Estrogen). Because of that, a moderate level of aromatization is expected from Testosterone use. To counter this problem there are two solutions:
- Selective Estrogen Receptor Modulators (SERMs) like Tamoxifen Citrate (Nolvadex) or Clomifene (brand names: Androxal, Clomid and Omifin) function by binding to the estrogen receptors - filling them and preventing actual estrogen from binding.
- Aromatase Inhibitors (AIs) like Anastrozole (Arimidex) function by inhibiting the aromatase process and even lower the body's own estrogen levels. Aromatise Inhibitors are far more effective than SERMs.