Testosterone Enanthate 10ml vial, 250mg/ml (Swiss Pharm). Testosterone enanthate is an anabolic steroid with extremely high anabolic and androgenic effects. It is a long acting injectable testosterone that is widely used amongst athletes. Testoviron depot is currently the most popular testosterone ester available to athletes. Testosterone is still number one steroid for building mass and can help anyone to within a short time increase his strength and weight. It aromatizes in high dosages therefore it is wise to use it with Proviron, Nolvadex or Arimidex. Testosterone enanthate is long acting - up to three weeks but for bodybuilding, weightlifting, power lifting purposes weekly injections are the way to go.