Sustanon

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Sustanon 250

Sustanon 250 is a trade name owned by Organon Pharmaceuticals for an oil-based injectable blend of four esterized testosterone compounds:

Sustanon 100 was similar, though with three esters. This smaller dose was usually for pediatric use.

  • 20 mg testosterone propionate
  • 40 mg testosterone phenylpropionate
  • 40 mg testosterone isocaproate

Sustanon 100 has not been produced since 2009.[1]

The different testosterone esters provide for different half lives. Esterization of the testosterone molecules provides for a sustained (but non-linear) release of testosterone from the injection depot into the blood plasma.

While the intention of the mixed testosterone esters in Sustanon is to provide more stable serum testosterone levels, a single long-ester testosterone, such as testosterone cypionate or testosterone enanthate, may actually provide more stable serum testosterone levels.[medical citation needed]

Sustanon is the preferred method of testosterone replacement in the UK as detailed in the British National Formulary.[citation needed] There was a brief shortage of Sustanon 250 during late 2011, due to licensing problems[2] and a further shortage in mid-2012 due to manufacturing problems.

This form of testosterone is a popular choice of anabolic steroid among bodybuilders and athlete.

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