For the purpose of performance and physique enhancement, Deca is usually used by beginners in the range of 300 – 500mg per week. Intermediate users normally do not have to venture above the 500mg mark within that beginner range, especially when Deca Durabolin is stacked with other compounds such as Testosterone and/or another oral compound as a kickstarter. Advanced users should likewise have no major requirement to veer outside this dose range, but should an advanced user require a higher dose to elicit gains, a range of approximately 600 – 800mg or greater should suffice, especially if Nandrolone is the primary anabolic compound of a cycle and Testosterone is simply run as a supportive compound at TRT (Testosterone Replacement Therapy) doses.
If you compare this to testosterone, you will notice that the methyl group on C10 has been removed and the oxygen on C3 has been reduced to a hydroxyl (-OH) group. These two changes reduce the number of bonds on all the carbons, so aromatization occurs, and alternating double bonds form. In order for aromatase to function and aromatize a steroid, the steroid must have a methyl group attached to the C10. This is another example of the lock and key model. For this reason, Nandrolone does not aromatize and is not converted to an estrogen. It does not have the methyl group.
In terms of how NPP compares to testosterone, it’s more anabolic, but not by much. To put it into perspective, testosterone has a 125 rating, while testosterone has a rating of 100. It’s much less androgenic than testosterone, with a rating of 37. Testoesterone rates 100. Decreased androgenic properties are because Nandrolone reduces to DHN instead of reducing to DHT. For this reason, NPP is easier for males to tolerate in high doses, versus testosterone. DHN stands for dihydronandrolone and DHT stands for dihydrotestosterone.