Testosterone propionate is an esterified form of the base steroid testosterone which gives a slows release of the steroid into the blood stream. Levels will peak after 24-36 hours and begin tapering from there on out, making the longest possible time-span between injections about 3 days. Most athletes will opt to inject 50-100 mg every day to every other day. It is certainly not the most user-friendly steroid. Frequent injections can be painful and is not that pleasant to inject. Injection-sites can become irritated and swell. This is a testosterone with a high risk of side-effects so the use of Nolvadex and Provironum are highly advised if you plan to see a cycle through. T- propionate can also be used in a cutting cylcle. By injecting every two or three days and using only 50-75 mg each time, no notable water builds up and no fat is deposited thus allowing a user to stay relatively lean. So this type of testosterone can be used to keep gaining or retaining mass until 2-3 weeks out of contest time with relatively little difficulty. Although most will choose to add Proviron (50-100 mg/day) out of precaution. Its best use is still in bulking phases to pack on mass.The site of injection is best rotated each time or problems can occur. Thid compound is irrigative and the damage to the skin and underlying tissue can cause some cosmetic problems if it becomes repetitive. For bulking purposes it is best stacked with a base compound such as Deca-durabolin (nandrolone) maybe also with the addition of Dianabol or Anadrol .For cutting, the best addition is that of Provironum which will reduce estrogen build-up and also increase the muscles hardness and strength . The use of anti-estrogens is advised. Should problems arise starting on 20-40 mg of Nolvadex until a while after problems subside should be sufficient for all intents and purposes. A post-cycle therapy with Nolva/Clomid and HCG is necessary. Usually one will start HCG the last week or two weeks of a stack and run it about 4 weeks. HCG shots of 1500-3000 IU given every 5th or 6th day. That means during the end of a cycle, one shot of HCG is given per two shots of testosterone. A user should also opt to wait on using clomid or Nolvadex until the androgen is cleared. One will then start on either 40-50 mg of Nolvadex or 150 mg of Clomid per day for a period of two weeks, and then follow it up with 20-25 mg of Nolvadex or 100 mg of Clomid per day for another two weeks. Post-cycle therapy will facilitate the return of natural testosterone and make it more likely for the user to retain most of the mass he gained while on the cycle.