Testosterone was first synthesized by being isolated from an animal source in 1935. Many different esters, including enanthate, have been attached to the parent hormone since then.. Testosterone Enanthate is the most popular form of testosterone prescribed everywhere in the world.
Testosterone induces changes in shape, size and also can change the appearance and the number of muscle fibres. Androgens like testosterone can protect your hard earned muscle from the catabolic (muscle wasting) glucocorticoid hormones, thus inhibiting their ability to send a message to muscle cells to release stored protein. Remember, Testosterone sends a message to muscle cells to store more contractile protein (called actin and myosin); glucocorticoid hormones send the opposite message. In addition, Testosterone has the ability to increase erythropoiesis (red blood cell production) in your kidneys, and a higher Red Blood Cell (RBC) count may improve endurance via better oxygenated blood. More RBCs can also improve recovery from strenuous physical activity. Agression levels often rise dramatically with the use of exogenous testosterone.
The longer the ester on the testosterone is, the longer the steroid is active in your body, and the less actual test you get. This is because, for every 100mgs of testosterone cypionate you inject, only 69.90mgs of it is actually testosterone, the rest is the cypionate ester, which must be removed. On the other hand, with the propionate ester you´ll get 83.72mgs of Testosterone! The advantage to longer esters is that they need to be injected less frequently (test prop needs to be injected every other day while you can shoot test cyp once a week). The disadvantage to long estered steroids is that they contain less actual steroid. Anecdotally, however, most people who have tried differing esters on their various cycles agree: Testosterone Propionate causes the least side effects and the least bloating. For this reason, it´s often the testosterone of choice in cutting cycles. Testosterone levels when you´re using injectable testosterone propionate begin to decline sharply after the second day of use. Obviously this is not the drug of choice for those who are squeamish about injections, you´ll be shooting this stuff every other day at least.
Also, as with most steroids, injected testosterone will inhibit your natural test levels and HPTA (Hypothalamic Pituitary Testicular Axis). A mere hundred mgs of test/week takes about 5-6 weeks to shut the HPTA, and 250-500mgs shuts you down by week.
Realistically, every cycle should contain testosterone. Go back and read that sentence again. A beginners´ dose of testosterone (i.e. someone on their first or second cycle of AAS) would be in the 250-500mgs range.
What stacks well with testosterone propionate? Everything! Many people´s favorite´s are Boldenon (Boldenone undeclyenate) or Deca (Nandrolone decanoate), but really, anything will stack well with test prop. Parabolan, Masteron, and/or Winstrol are also favorites for many on a cutting cycle, myself included. It´s important to remember that since test prop has such a short ester, most people stack it with other short estered drugs, the rational being that they need to endure frequent injections for the test prop to be effective, so they may as well be using other drugs requiring the same dosing protocol.
Finally, it´s worth noting that sometimes a strategy known as "frontloading" is employed with testosterone propionate, this is where double or triple the intended dose for the cycle is injected for the first two weeks, then the user switches to a longer ester. The reasoning behind this is presumably to get the blood levels of the drug up quickly in the hopes of seeing results more quickly.
Effective Dose (Men): 350-2000mg+ week.
Effective Dose (Women): 50-100mgs/week
Active life: 2-3 days
Detection Time: 2-3 weeks
Anabolic/Androgenic ratio:100/100.
Store in temperature not exceeding 77oF(25oC), in a dark place.