Regardless of your purpose, possible side-effects may occur, but with responsible use, they are very easy to avoid. First and foremost, if you are a healthy adult male who supplements with responsible doses you will in most all cases be completely fine. To add protection, supplementing with an Aromatase Inhibitor can be extremely useful, as many of the testosterone based side-effects are aromatase based. Of course, if your dose goes to an extreme level, the higher it goes the greater the risk of adverse side-effects, and this is something you must keep in mind. If you're a healthy adult male and supplement with a dosing of 100mg every other day, you will rarely have a problem. If you are a healthy adult male looking for a really big cycle, if you supplement with 200mg every other day along with the use of an Aromatase Inhibitor such as Arimidex of Letrozole, and live a lifestyle that promotes health, you will be in the clear almost each and every time. The only reason we cannot say each and every time and must add the word "almost" is because individual genetic response is impossible to predict. For example, some people cannot take Aspirin, but most can. In any case, smaller or larger doses Aromatase Inhibitors are advised, as for with this alongside responsible use you can enjoy all the benefits of Testosterone-Propionate.
It should be remembered that muscle growth is dependent not only on the protein synthesis, but also on other factors such as the delivery of nutrients to the tissue and protein breakdown. In order to get the fullest possible picture of this process, it is necessary to consider the interaction of androgen in combination with all the other factors. Recent studies suggest that testosterone does not lead to increased tissue additions to amino acids. This may explain the total combined effect of insulin – a hormone that significantly affect the nutrient delivery to muscle cells. This feature noted by many athletes in recent years. As for the breakdown of proteins, it seems to us, the second a long way possible effects of androgens on muscle mass.
Think about this, if you poke yourself three times per week on a typical eod schedule, you are barely getting 200mg of testosterone in your system for the week (68 x 3 = 204). If you took 3cc’s of either phenylprop or prop per week you would be getting 204mg of pure test from the phenylprop and 252mg from the prop. The names sound very similar, they act with the same speed of release, but their potency is totally different. The 48mg difference (252-204=48) per week represents roughly 24% of the total phenylprop and 19% of the prop amount of pure testosterone in your system. In functional terms what this means is that using two drugs which are suppose to be similar actually equate to a 1/5 difference on the low end and a ¼ difference on the high end with respect to your total weekly dosage. Don’t you think increasing your dosage by 20% is significant? How about getting a minimal of a 20% DECREASE------YIKES. We all know decreasing dosages is so much fun----YEAH RIGHT!! But this is what happens if you take equal amounts of these two drugs. You will get about 20% more active, pure testosterone in an equal amount of testosterone propionate than testosterone phenylpropionate. I hope we are all on the same page, this will be a recurring theme on this site due to its importance.