Testosterone Isocaproate is a form of the male hormone testosterone. It is used to make sustanon and most commonly known as Nebido. After an application the isocaproate ester releases a long lasting effect of testosterone into the bloodstream, lasting approximately 10 days depending on the users metabolism and initial hormone levels. To maintain the physiological levels of the testosterone in the body it is necessary to receive applications every 10 days to maintain hormone levels.
Testosterone Isocaproate is a modified form of the male hormone testosterone. It is an ester of a carboxylic acid bound to the 17-beta hydroxyl group. These modified forms of testosterone are not as polarized as free testosterone which generates slow absorption from the injection site. Once the testosterone isocaproate is in the bloodstream, the isocaproate ester separates from the testosterone making it free and active. This type of esterified steroid is designed to prolong the effect of the testosterone in the body, requiring less injections compared to other steroids that are not esterified. Testosterone isocaproate has a half life of approximately 10 days.
All types of testosterone have the ability to aromatize in the body due to an ester called aromatase, this is also responsible for the conversion of testosterone into estrogen. Due to the prolonged effect of testosterone isocaproate, hormone levels tend to fluctuate after every application increasing the risk for higher estrogen levels in the bloodstream. It is essential to use antiestrogens to control estrogen levels and to decrease the risk of gynecomastia, water retention and body fat gain. These type of products have no hepatotoxic effects compared to other oral substances. Like all other anabolic androgenic steroids, testosterone has the ability to reduce the production of endogenous testosterone. Prolonged use could cause hypogonadism which could cause an excessive loss of muscle mass and an anabolic and catabolic hormones at the termination of testosterone treatment. It is important to complete a proper post cycle therapy to stimulate the production of endogenous testosterone to avoid losing significant muscle mass during a short period of time.
Testosterone Isocaproate is a fine white powder, easy to compress, stable at normal environmental conditions and has a low melting point compared to other substances.
Testosterone Isocaproate is an oil base that is generally a very light yellow to transparent in colour. In high concentrations testosterone isocaproate does not crystallize within the vial. The viscosity in comparison to other substances is high and it is uncommonly found on its own. Generally it is found amongst the four testosterones used to make sustanon.