Like other AAS, drostanolone is an agonist of the androgen receptor (AR).  It is not a substrate for 5α-reductase and is a poor substrate for 3α-hydroxysteroid dehydrogenase (3α-HSD), and therefore shows a high ratio of anabolic to androgenic activity.  As a DHT derivative, drostanolone is not a substrate for aromatase and hence cannot be aromatized into estrogenic metabolites .  While no data are available on the progestogenic activity of drostanolone, it is thought to have low or no such activity similarly to other DHT derivatives.  Since the drug is not 17α-alkylated , it is not known to cause hepatotoxicity . 
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A Testosterone Propionate cycle during a cutting phase is an excellent way to ensure muscle mass isn’t lost during a diet. You will also find it enhances fat loss efficiency and produces a stronger more defined look. As with the off-season Testosterone Propionate cycle, the total stack and doses may need to be adjusted in order to meet your needs; again, this is a sample guide. It is also important you consult with your doctor to ensure you’re healthy enough for use. Important Note – This type of Testosterone Propionate cycle will not produce less or more water retention compared to plans that might contain Testosterone Cypionate or Testosterone Enanthate in the Propionate versions place. It’s often assumed by many steroid users that Testosterone Propionate will yield less water retention than the aforementioned versions but that’s a myth. Testosterone is testosterone and does not become active in the body until the ester has been removed. The reason many believe it leads to less water retention is a very simple one; most given extra attention to their diet and estrogen control during a cutting phase, and this will always lead to less water retention in a Testosterone Propionate cycle or any cycle.