Deca is superior to NPP for bulking, actually NPP sucks compared to real deca, for ME...although.some love the shit. I just know deca makes me grow better- There was actually a study showing that when choosing nandrolone for muscle growth your best off
1. Choosing the longest ester possible (deca durabolin over NPP)
2. Injecting the highest concentration possible per shot
3. Injecting into the gluteal muscle