Androgenic         100

Anabolic              100

Estrogenic Tendency      Moderate

Progesterone Tendency          Low

Testosterone Propionate contains the male androgen Testosterone along with the propionate ester (propionic acid).  This ester is among the quickest releasing esters resulting in a short half-life and the need for more frequent injections to maintain a constant and therapeutic level of Testosterone in the body.  Normally, injections are required from every day (ED) to every other day (EOD) at the appropriate dose for each injection to equal the total desired weekly dose.

Even with its frequent injection schedule, many prefer Testosterone Propionate because it is considered to be the most mild form of Testosterone, giving the user less water retention and bloating.  Some even say it hardens the muscles as well. 

Estrogenic Side Effects

Testosterone is metabolized (aromatized) in the body by the aromatase enzyme into estrogen (estradiol).  Elevated estrogen levels cause side effects such as water retention, fat gains, and gynecomastia.  This phenomenon may require the use of an aromatase inhibitor such as Arimidex to stop the production of estrogen or anti-estrogens such as Clomid or Nolvadex to prevent or reduce these side effects.

Also, it should be mentioned that that the level at which these side effects occur is generally dose dependent.  In other words, the higher the doses the greater the chances of experiencing these effects.  Further, the higher the doses, the more severe the side effects may become.

Androgenic Side Effects

Testosterone is the compound responsible for maintaining the secondary male sexual characteristics such as facial hair, oily skin, acne, ect.  By introducing such high levels of testosterone into the body, these secondary male sexual characteristics can be greatly amplified.  In addition, those users with a predisposition to hair loss, may experience this at an accelerated rate.

Liver Toxicity

Hepatotoxicity (liver toxicity) is not associated with the use of testosterone.

Testosterone Suppression

Any anabolic or androgenic steroid administered in doses required to promote muscle growth will suppress the body’s natural testosterone production.  Thus, it is important to engage in a proper Post Cycle Therapy (PCT) after a cycle containing any form of testosterone.  The PCT should include some sort of testosterone stimulating compound and be designed to return the user’s natural hormone levels to normal in as short amount of time as possible.