TestoGen 250 is form of testosterone that has been modified by the attachment of a carboxylic acid ester to the 17-beta hydroxyl group. This has the effect of slowing the release of testosterone into the bloodstream by sustaining it for approximately 2 weeks.
TestoGen is primarily incorporated into bodybuilding bulking cycles when addition of raw muscle mass and a large increase in strength is the goal. It can be used alone or stacked with other anabolic/androgenic steroids to increase its effects. Additionally, it is also effective in cutting cycles when lean muscle retention is desired.
It remains the most widely prescribed form of testosterone in a clinical setting and is used to treat low libido, muscle wastage, diminishing energy levels. It is the main component in testosterone replacement therapy (TRT).