Sustanonwas first developed by Organon as an ideal HRT (Hormone Replacement Therapy) solution. It was a general opinion during that period that the different esters will be able to provide a consistent release of Testosterone within a month or so. Sustanon is a mix of four estered testosterones: testosterone propionate, testosterone phenylpropionate, testosterone isocaproate, and testosterone decanoate in different proportions.

Sustanon is ideally the best product to enhance your natural testosterone levels and get all the advantages that come with it i.e. improved muscle mass and strength, enhanced endurance etc. Sustanon is a mix of testosterone esters with a purpose of providing consistent serum testosterone levels. It is the favored way of testosterone replacement in the United Kingdom as per the British National Formulary. Sustanon is quite common anabolic steroid product among those athletes and bodybuilders that use anabolic steroids for muscle building purposes and other enhancements.

In late 80s and till mid 90s, Sustanon was highly treated as a "superior" version of testosterone. It was well supported by a number of write ups by Dan Duchaine in his newsletters. Best part of this drug is that it can be injected once in a month, and the different esters according to their half life would provide different timed releases during that month. The patient would thus only need to go to the doctor once a month for his shot. For athletes or bodybuilders its dose may vary as per their requirements.

Sustanon helps in both muscle growth as well as fat loss. It tells muscle cells to store more contractile protein (called actin and myosin), thereby helping your muscles grow faster and steadier. It also helps in protecting your muscles from catabolic (muscle wasting) glucocorticoid hormones. Hence, It is often said that Sustanon is not only anabolic, but it is strongly catabolic. It not only ensures an increase in size of the muscle fibres (hyperfascia) but it also has the ability to change the appearance and the actual number of muscle fibres (Hyperplasia). Sustanon is capable of increasing erythropoiesis (red blood cell production) in your kidneys. A higher Red Blood Cell (RBC) count is bound to improve endurance by producing more highly oxygenated blood. More RBCs would also enhance recovery from strenuous physical activities. Any exogenous form of testosterone like Sustanon has an ability to increase aggression levels in the body. Sustanon increases muscle contraction by incrementing the number of motor neutrons in muscle and thus improves neuromuscular transmission. It also regulates glycogen synthesis.

Since Sustanon is simply a mix of 4 forms of testosterone, we must understand that administration of this compound will produce a dose respondent curve which simply means that the more you take, the more you can get. This is true of Sustanon as well as for every form of testosterone, up to a limit. As is evident, that solubility of different esters of a steroid compound like Sustanon is independent of each other. This property gives convenience of dissolution of 4 different testosterones in the body by requiring less amount of solubility enhancers.