Testosterone Enanthate 250mg/ml a long acting form of the parent hormone testosterone. In this particular case, the parent hormone has been attached to the Enanthate ester to delay its release into the bloodstream over several days. Background Testosterone was first synthesized by being isolated from an animal source in 1935. Many different esters, including enanthate, have been attached to the parent hormone since then. Testosterone Enanthate is the most popular form of testosterone prescribed everywhere in the world except for the United States, where the very similar Testosterone Cypionate is typically preferred. The most common form of Tesosterone Enanthate (other then generic or underground) available in the United States is called “Delatestryl.” Steroid Action Testosterone exerts both genomic and non-genomic effects in the human body. This means that while many of testosterone’s effects are mediated by the androgen receptor, and gene transcription, many also occur without such stimulation. Testosterone promotes health and well-being, enhances libido, increases energy and promotes fat loss. It can also boost immunity. Testosterone aids in gaining and preserving lean muscle mass. It prevents against bone loss as well as heart disease.