Please see the profile on Testosterone Enanthate for a general discussion of all testosterones.

Testosterone is the king of all anabolic/androgenic steroids. It was the synthetic development of this naturally occurring hormone for medical (and later athletic) purposes that was the dawn of the development of all AAS. Testosterone is now the baseline for measuring the efficacy of numerous other steroid products. The use of testosterone for athletic performance probably equals the use of all other performance enhancing products combined.

Since free testosterone in the body will only last a few hours esters are added to the testosterone molecule in order to slow the absorption of this compound by the body. A number of different esters can be added thereby affecting the rate of absorption of testosterone. Propionate is the shortest ester available for combination with testosterone. The propionate ester slows the absorption of bio-available free testosterone in the body although testosterone propionate is still metabolized quickly in comparison with other estersized testosterones like enanthate and cypionate. The plus side of this fast acting ester is two-fold. One, test prop makes for a good way to kickstart a steroid cycle as an athlete will have bio-available testosterone in their system much faster than with other test esters. Secondly, the propionate ester is the shortest ester available which means that more testosterone per mg will be available since less molecular weight will be taken up by the ester itself.

There is some indication that users of testosterone propionate experience fewer side effects and less bloating than users of longer acting testosterone esters. Therefore, testosterone propionate may very well be the only testosterone considered for cutting cycles where test prop may be combined with other fast acting injectables. The downside for many users however is the fact that more frequent injections are necessary to maintain steady blood concentrations of testosterone when administered via testosterone propionate. Also, testosterone will undoubtedly inhibit the natural HPTA and be partially converted to both estrogen and dihydrotestosterone. As a result, side effects like, acne, hair loss, gynecomastia and water retention are all possible even likely with continued use. On the positive side again, the fact that testosterone propionate leaves the system quickly (blood levels drop significantly after the second day of use) means that you can begin to recover from side effects more quickly.

Preferred dosages appear to range from 50mg-150mg/day or every other day. Because prop leaves the system fairly quickly, women will administer this compound as well however with a typical dose of 25-50mg every 5-7 days. Good stacking options appear to be stanozolol, trenbolone and oxandrolone for "quality" muscle gains, nandrolone, oxymetholone or methandrostenolone for mass, or just as an addition to any cycle as a kickstart.

Testosterone Propionate is produced by many reputable pharmaceutical companies such as Geneza Pharmaceuticals (GP Test Prop 100), Sciroxx (Testodex Propionate 100), Axiolabs (Testaplex P 100), British Dragon (Testabol Propionate).