Anavar has a much higher potential to promote anabolic effects on the human body such as an increase muscle size, strength, nitrogen retention, reduce fat deposition and induce protein synthesis compared to testosterone. While testosterone will also promote androgenic affects, Anavar was designed to lessen the unwanted androgenic effects and promote more anabolic properties.
Anavar has much higher anabolic activity compared to testosterone. Anavar has an anabolic: androgenic ratio of 10:1 and a higher steroid protein activity level (SPAI) of 2.8. Testosterone on the other hand has an anabolic: androgenic ration of 1:1 and an SPAI of 1.