Testosterone Propionate promotes nitrogen retention in the muscle, and the more nitrogen the muscles hold the more protein the muscles store, and the bigger the muscles get. Testosterone Propionate can also increase the levels of another anabolic hormone, IGF-1, in muscle tissue. IGF-1 is alone highly anabolic and can promote muscle growth.
500 mg/week is a reasonable minimum for muscle gains, except for an advanced trainer, who may need 1000 mg/week to make much further gains.
From the medical standpoint, 600 mg/week has been shown to be quite safe. Furthermore, in double blind studies and so forth, doses of less than 300 mg/week generally have resulted in nothing. These studies have usually been with athletes training the same during the cycle as they were beforehand. They’re generally useless for our purposes but they do make a point here. If the dose is 300 mg/week and an athlete trains and eats the same as before, no miracle results.
How to use:
For example, 100mg of Testosterone-Propionate administered on day one will fall to 50mg by day 4 and 25mg by day 8 and so on. Conversely, so that you may understand the significance, 100mg of Testosterone-Cypionate administered on day one will fall to 50mg but not until day 12 post injection. For this reason, in order to maintain stable and peak levels of the hormone in the body we must necessarily administer the hormone once every 3 days with every other day being optimal.